mobile qa engineer / software test engineer

lead backend engineer

mobile qa engineer / software test engineer Jobs in Istanbul

principal engineer - data infrastructure Jobs in Istanbul

principal engineer - data infrastructure

senior web frontend engineer Jobs in Istanbul

senior web frontend engineer

service engineer

software engineer

Medsien Inc.

<div><p>Medsien is the leading provider of scalable remote care management for a quality patient experience. Hundreds of organizations trust Medsien's unparalleled technology solutions to implement exceptional remote care management programs, personalize every interaction, and improve the lives of the people who need it most. Based in San Francisco and venture-backed by top-tier investors, Medsien was founded to reimagine remote care management.</p>
<p>
More than 60% of all U.S. adults&mdash;over 150 million people&mdash;live with at least one chronic condition, which requires dedicated, ongoing medical support outside the four walls of their doctor's office. And yet, only 20% of these patients have access to remote care from the comfort of their homes, putting their health at significant risk. Together, we can save lives and create a real impact.</p>
<p>
Medsien is a venture-backed healthcare SaaS company experiencing rapid growth and looking to expand our team. We're looking for a passionate <b>Mobile QA Engineer / Software Test Engineer</b> to join our team and play a key role in delivering a high-quality mobile application. You'll own the testing efforts for our new mobile product while occasionally supporting our web application initiatives.</p>
<p><b>
As a Mobile QA Engineer / Software Test Engineer, you will:</b></p>
<ul>
<li><b>Design, develop, and execute comprehensive test plans and test cases for iOS and </b><b>Android applications.</b></li>
<li>Build and maintain automated test suites using <b>Appium.</b></li>
<li>Collaborate closely with developers, product managers, and designers to ensure quality throughout the development lifecycle.</li>
<li>Identify, document, and track defects to resolution.</li>
<li>Perform functional, regression, performance, and usability testing.</li>
<li>Contribute to web application testing efforts when needed.</li>
<li>Continuously improve testing processes and advocate for quality best practices.</li>
</ul>
<p><b>Please apply if you have:</b></p>
<ul>
<li><b>2+ years of experience in</b> <b>mobile application testing</b> (iOS and Android).</li>
<li>Having worked in a dynamic, agile environment with minimal supervision,</li>
<li>Experience with <b>mobile test automation frameworks</b> (Appium or similar).</li>
<li>Solid understanding of mobile testing frameworks, tools, and methodologies.</li>
<li>Experience with <b>bug tracking and test management tools </b>(Jira).</li>
<li>Familiarity with <b>CI/CD pipelines and integrating automated tests.</b></li>
<li>Familiarity with <b>Gen-AI and AI-assisted testing tools.</b></li>
<li>A creative and driven mindset with experience navigating through ambiguity and a desire to work in a fast-paced, results-driven environment,</li>
<li><b>Perfect English skills</b>; both written and oral,</li>
<li>Excellent communication and collaboration abilities.</li>
<li>Bachelor's Degree or higher in Computer Science, or a related field of study,</li>
<li>Proven experience in <b>Agile/Scrum methodologies.</b></li>
<li>ISTQB or similar certification.</li>
<li>Residence in <b>Istanbul city center</b>.</li>
</ul>
<p><b>For this position, we offer:</b></p>
<ul>
<li>competitive USD salary and stock options,</li>
<li>Flexible vacation and PTO policies,</li>
<li>Fully remote work opportunities,</li>
<li>Training, mentorship, and coaching from leadership.</li>
</ul>
<p>Please bear in mind that:</p>
<ul>
<li>This is a <b>permanent-term contractor</b> job opportunity with Medsien Inc.
</li><li>Due to in-person collaboration requirements, <b>candidates based in Istanbul are preferred.</b></li>
<li>All interviews will be conducted in English and the candidates having less than advanced level of English will be directly eliminated from the process regardless of their technical skills and expertise.</li>
</ul>
<p><b>Our Process</b></p>
<p>
We will review your application along with all the others we receive and pick the top profiles for a screening call. In many cases due to time constraints and our candidate volume, only the short-listed candidates are contacted but we do consider each application carefully. If you have been selected as a short-listed candidate, we will contact you for a short screening call to get to know you better. If you don't get a call, please don't be disappointed! We receive many applications for each role and must prioritize who we speak to.</p>
<p>
Employment at <b>Medsien</b> is based solely on a person's merit and qualifications. We are committed to providing equal employment opportunity regardless of sex, age, race, color, national or ethnic origin, religion, marital status, pregnancy, sexual orientation, gender identity or expression, disability, age, citizenship, veteran or military status, and other legally protected characteristics.</p>
<p><b>
Thank you for taking the time to apply for a position at Medsien!</b></p>
<p>
Please visit the below links for GDPR details:</p>
<p>
https://www.medsien.com/legal/employee-candidate-information-notice</p>
<p>
https://www.medsien.com/legal/employee-candidate-explicit-consent-statement</p></div><p></p>

Mobile QA Engineer / Software Test Engineer

Commencis

<div><div>We are looking for a highly motivated and experienced <b>Lead Backend Engineer</b> to join our team.</div>
<div></div>
<div><b>Lead Backend Engineer</b> is responsible for designing, developing, and maintaining scalable backend systems that power our products and services. In this role, you will translate business and product requirements into robust technical solutions, ensuring high performance, reliability, and security across backend services.</div>
<div></div>
<div>As a technical leader, you will collaborate closely with cross-functional teams including frontend developers, DevOps engineers, product managers, and solution architects to design and implement efficient, scalable, and maintainable backend architectures.</div>
<div></div>
<div><b>If you are curious by nature, adaptive, collaborative, and always one step ahead, then join us and be a Commencer!</b></div>
<h3 class="jobSectionHeader"><b>Responsibilities
</b></h3><ul><li>Design, implement, and operate cloud-native AI/ML services that are secure, reliable, and cost-efficient ensuring that they meet the business objectives and adhere to service level agreements (SLA).</li>
<li>Deploy and maintainAI applications on cloud- architecture.</li>
<li>Build retrieval-augmented generation (RAG) stacks: embeddings, vector stores, chunking, and evaluation.</li>
<li>Create MLOps foundations: experiment tracking, model registry, CI/CD for data &amp; models, and Infrastructure-as-Code.
</li><li>Investigate new techniques, tools, and methods that might increase efficiency among engineering &amp; technology and cloud teams, as well as leading execution processes of topics evaluated &amp; planned for roll-out.</li>
<li>Collaborate with other technical leaders and business stakeholders to align all constraints and come up with solutions regarding project/product/initiative outputs.</li>
<li>Be accountable for the reliability and security of cloud infrastructure and services.</li>
<li>Provide visibility of performance, cost, and the security of cloud infrastructure and services.</li>
<li>Drive continuous improvement, continuous delivery, and lean practices within the cloud team.</li>
<li>Keep up to date on modern technologies and trends and advocate for their inclusion within products when it makes sense.</li>
<li>Identify emerging technology solutions that reduce costs, increase efficiencies, enhance capabilities, reduce risk and improve security.</li>
<li>Ensure that all cloud technology applications create a positive customer experience.</li>
</ul><h3 class="jobSectionHeader"><b>Qualifications
</b></h3><ul><li>BS/MS degree in Computer Science, Engineering or a related subject.
</li><li>Proven hands-on software engineering experience.
</li><li>Strong experience in Java development.
</li><li>Strong experience with Spring Framework, preferably Spring Boot.
</li><li>Hands-on experience in designing and developing enterprise-grade backend applications.
</li><li>Solid understanding of microservice architecture and distributed systems.
</li><li>Experience with event-driven architecture and asynchronous integration patterns.
</li><li>Strong knowledge of scalable, resilient and high-availability system design.
</li><li>Solid understanding of object-oriented analysis and design using common design patterns.
</li><li>Experience with RESTful APIs and backend integration patterns.
</li><li>Experience leading highly skilled software engineers and supporting team growth.
</li><li>Ability to coordinate effectively across multiple teams and stakeholders.
</li><li>Strong communication skills in English, both written and spoken.
</li><li>Team Lead and Agile Scrum experience is a strong plus.
</li>
</ul><div></div><h3 class="jobSectionHeader"><b>Preferred Qualifications
</b></h3><ul><li>Experience with containerized environments and CI/CD pipelines.
</li><li>Experience with monitoring, logging and observability tools in distributed systems.
</li><li>Familiarity with cloud-native architectures and modern backend infrastructure.
</li><li>Experience in performance optimization, system reliability and production support.
</li></ul><div><b>Why Commencis?</b></div>
<div></div>
<div>We want people to thrive at Commencis. Here&rsquo;s what Commencers like about working here:</div>
<div></div>
<div><b>Competitive Compensation &amp; Benefits:</b> We offer a competitive salary, private health insurance, pension and retirement plans through a company-backed pension system, meal card, commute compensation, work-from-home support, and a paid birthday off.</div>
<div></div>
<div><b>Happier Weekdays:</b> We offer flexible working hours, including a remote working option. Enjoy online events, guest speakers, office refreshments, a meeting-light culture, and many more perks to enhance your weekdays.</div>
<div></div>
<div><b>Never Stop Learning:</b> We support learning and development programs for almost anything. Additionally, we provide access to leading online e-learning platforms like Udemy and various libraries.</div>
<div></div>
<div><b>Community &amp; Socials:</b> We are a tight-knit community that loves gathering together. Our social activities include happy hours, workshops, a New Year party, breakfast &amp; lunch get-togethers, movie nights, and our Summer Festival.</div>
<div></div>
<div><b>Open Culture:</b> We maintain a flat organizational structure with a culture of direct and open communication. We value Commencers&rsquo; voices and address any suggestions and questions you may have.</div><br>
<div></div>
<div></div>
<div><b>About Commencis</b></div>
<div></div>
<div>Join us in paving the way for a thriving digital society!</div>
<div></div>
<div>Commencis has more than two decades of expertise in the world of experience design, software engineering and cloud technologies. Our products and solutions are used by leading brands in financial services, insurance, airlines and retail in more than 20 countries.</div>
<div></div>
<div>We help our clients around the globe to commence their next evolution and pave the way for a thriving digital society. We love discovering what&rsquo;s next. We value collaboration, curiosity, and an open mindset at work.</div>
<div></div>
<div>If you share the same passion with our fellow Commencers, then let us unleash your world-class potential!</div>
<div></div>
<div><b>We will process your personal data as part of our recruitment procedures. To find out more, please consult our </b><b>Candidate Privacy Notices</b><b>.</b></div>
<p>
We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.</p></div>

Lead Backend Engineer

<div><div>We are looking for a highly experienced <b>React Native </b>professional who can drive mobile projects from start to finish. This role requires deep expertise and ownership across both technical and project aspects.</div><div></div><div><b><br>
If you are curious by nature, adaptive, collaborative, and always one step ahead, then join us and be a Commencer!</b></div>
<h3 class="jobSectionHeader"><b>Responsibilities</b></h3><ul><li>
Strong foundation in React Native and be able to develop complex mobile applications using React Native</li><li>
Deep understanding of mobile app development, including UI/UX design principles, performance optimization, and app architecture</li><li>
 JavaScript experience and be able to write clean, modular, and maintainable code</li><li>
 Experience using Redux to manage state in React Native applications</li><li>
 Experience integrating with APIs and be able to design and develop API interfaces for mobile applications</li><li>
 Familiar with the process of deploying mobile apps to the App Store and Google Play Store</li><li>
Develop cross-platform mobile applications that work on both iOS and Android devices</li><li>
Experience in writing unit tests, integration tests, and end-to-end tests for React Native applications.</li><li>
Familiar with CI/CD tools and be able to set up and maintain automated build and deployment pipelines that are specific for mobile deployments</li><li>
Problem-solving skills and be able to troubleshoot and debug complex issues in React Native applications</li><li>
Strong problem-solving skills and be able to troubleshoot and debug complex issues</li><li>
Strong communication and stakeholder management experience</li><li>
Experience developing software with TDD automation</li><li>
Fluent English in both verbal and written communication</li></ul><h3 class="jobSectionHeader"><b>
Qualifications</b></h3><ul><li>
10+ years of overall software development experience, with 5+ years specifically in React Native</li><li>
Expertise in CLI, bridging, and native modules (Android/iOS)</li><li>
End-to-end ownership of mobile development, from architecture to release</li><li>
Familiarity with app store processes and best practices</li><li>
Ability to interface with clients when needed, understanding requirements and leading problem-solving discussions</li><li>
We want someone who not only builds exceptional mobile apps, but also confidently leads projects and engages with stakeholders when required.</li></ul><h3 class="jobSectionHeader"><b>
Nice to Have</b></h3><ul><li>
Knowledge of material design frameworks</li><li>
Knowledge of AMPs, Progressive Web Apps, and similar</li><li>
Understanding of RESTful web services</li><li>
Knowledge of relational and non-relational database systems</li><li>
Understanding of distributed caching</li><li>
Understanding of cloud computing and cloud application architectures</li><li>
Experience with software development tools such as Git, Gerrit, Jenkins, JIRA</li><li>
Prior experience with SCRUM/Agile methodologies</li><li>
Contributions to OpenSource projects</li></ul><div><b>
Why Commencis?</b></div><div>
</div><div>
We want people to thrive at Commencis. Here&rsquo;s what Commencers like about working here:</div><div>
</div><div>
Competitive Compensation &amp; Benefits: We offer a competitive salary, private health insurance, pension and retirement plans through a company-backed pension system, meal card, commute compensation, work-from home support and paid birthday off.</div><div></div><div><br>
Happier Weekdays: We offer flexible working hours including remote working option. Online events, guest speakers, refreshments in the office, meeting-light culture, and many more to enjoy the weekdays.</div><div></div><div><br>
Never Stop Learning: We support learning and development programs for almost anything. Additionally, we provide access to leading online e-learning platforms like Udemy and various libraries.</div><div></div><div><br>
Community &amp; Socials: We are a tight-knit community that loves gathering. Our social activities include happy hours, workshops, new year party, breakfast &amp; lunch get-togethers, movie nights, and our Summer Festival.</div><div></div><div><br>
Open Culture: We maintain a flat organizational structure with a culture of direct and open communication. We value Commencers&rsquo; voices and address any suggestions and questions you may have.</div><div></div><div><b><br>
About Commencis</b></div><div></div><div><br>
Join us in paving the way for a thriving digital society!</div><div></div><div><br>
Commencis has more than two decades of expertise in the world of experience design, software engineering and cloud technologies. Our products and solutions are used by leading brands in financial services, insurance, airlines and retail in more than 20 countries.</div><div></div><div><br>
We help our clients around the globe to commence their next evolution and pave the way for a thriving digital society. We love discovering what&rsquo;s next. We value collaboration, curiosity, and an open mindset at work.</div><div></div><div><br>
If you share the same passion with our fellow Commencers, then let us unleash your world-class potential!</div><div></div><div><br>
We will process your personal data as part of our recruitment procedures. To find out more, please consult our Candidate Privacy Notices.</div>
<p>
We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.</p></div>

Software Architect (React Native )

<div><div>We are currently seeking a highly skilled <b>Senior Web Frontend Engineer</b> to join our team.</div><div></div><div><b><br>
Senior Web Frontend Engineer</b> will be responsible for the complete lifecycle of scalable, secure, and well-designed software products from research and design to implementation. Also she/he will be working closely with designers, analysts, quality assurance, and other teams to translate each design into real-life products.</div><div></div><div><b><br>
 If you are curious by nature, adaptive, collaborative, and always one step ahead, then join us and be a Commencer!</b></div><br>
<div></div>
<h3 class="jobSectionHeader"><b>
Responsibilities
</b></h3><ul><li>Designing and developing Web Front-end software components based on core and client product specifications</li><li>
Maintaining and extending the functionality of existing Web Front-end software components</li><li>
Documenting the software components</li><li>
Implementing the unit tests</li><li>
Making architectural decisions in the enterprise projects.</li><li>
Improving the coding standards and processes within the team.</li><li>
Following up the new technologies and looking for the ways to implement them in the projects.</li><li>
Being a mentor in the web frontend development team, by making code reviews, pair programming, giving internal trainings, etc.</li></ul><h3 class="jobSectionHeader"><b>
Qualifications
</b></h3><ul><li>5+ years of web development experience</li><li>
Minimum 3 years of hands-on experience with Next.js</li><li>
Proficiency in modern CMS platforms, such as Kontent.ai or Strapi
</li><li>Strong understanding of SEO principles and familiarity with GEO-specific optimizations</li><li>
Ability to architect and deliver scalable, performant, and user-centric web solutions end-to-end</li></ul><h3 class="jobSectionHeader"><b>
Nice to have</b></h3><ul><li>
Experience with Vue.js and/or Angular.js</li><li>
Experience and understanding of CI/CD principles</li><li>
Experience with mobile applications (react-native, native or hybrid apps)</li><li>
Knowledge of material design frameworks</li><li>
Knowledge of AMPs, Progressive Web Apps, and similar</li><li>
Understanding of RESTful web services</li><li>
Knowledge of relational and non-relational database systems</li><li>
Understanding of distributed caching</li><li>
Understanding of cloud computing and cloud application architectures</li><li>
Experience with software development tools such as Git, Gerrit, Jenkins, JIRA</li><li>
Prior experience with SCRUM/Agile methodologies</li><li>
Contributions to OpenSource projects</li></ul><div>
Why Commencis?</div><div>
</div><div>
We want people to thrive at Commencis. Here&rsquo;s what Commencers like about working here:</div><div>
</div><div>
Competitive Compensation &amp; Benefits: We offer a competitive salary, private health insurance, pension and retirement plans through a company-backed pension system, meal card, commute compensation, work-from home support and paid birthday off.</div><div></div><div><br>
Happier Weekdays: We offer flexible working hours including remote working option. Online events, guest speakers, refreshments in the office, meeting-light culture, and many more to enjoy the weekdays.</div><div></div><div><br>
Never Stop Learning: We support learning and development programs for almost anything. Additionally, we provide access to leading online e-learning platforms like Udemy and various libraries.</div><div></div><div><br>
Community &amp; Socials: We are a tight-knit community that loves gathering. Our social activities include happy hours, workshops, new year party, breakfast &amp; lunch get-togethers, movie nights, and our Summer Festival.</div><div></div><div><br>
Open Culture: We maintain a flat organizational structure with a culture of direct and open communication. We value Commencers&rsquo; voices and address any suggestions and questions you may have.</div><div></div><div><br>
About Commencis</div><div></div><div><br>
Join us in paving the way for a thriving digital society!</div><div></div><div><br>
Commencis has more than two decades of expertise in the world of experience design, software engineering and cloud technologies. Our products and solutions are used by leading brands in financial services, insurance, airlines and retail in more than 20 countries.</div><div></div><div><br>
We help our clients around the globe to commence their next evolution and pave the way for a thriving digital society. We love discovering what&rsquo;s next. We value collaboration, curiosity, and an open mindset at work.</div><div></div><div><br>
If you share the same passion with our fellow Commencers, then let us unleash your world-class potential!</div><div></div><div><br>
We will process your personal data as part of our recruitment procedures. To find out more, please consult our Candidate Privacy Notices.</div><div></div><p><br>
We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.</p></div>

Senior Web Frontend Engineer

Hack The Box

<div>Ready to embark on the quest of joining Hack The Box?<p>
At the end of this thrilling journey, you'll become a proud member of Hack The Box, with the ultimate mission to help redefine cybersecurity expertise. Get ready for an exciting adventure into the world of cybersecurity!
</p><p></p><b>✨The core mission of the Senior Django Engineer:</b><p>
We are on the lookout for our next backend engineer in LetsDefend team. Let&rsquo;s Defend is a cutting-edge cybersecurity training company dedicated to empowering blue-team professionals by simulating a real Security Operations Center (SOC). It has a community of over 320,000 members across 150+ countries fosters peer learning and collaboration.
</p><p>Hack The Box and LetsDefend join forces to create the world&rsquo;s largest collaborative cybersecurity platform with hands-on labs, SOC simulations, and a unified upskilling experience.</p><p>
This role will focus on enhancing backend performance and scalability, strengthening code quality and reliability, and leading architectural direction across teams. The software engineer will play a key role in improving system efficiency, reducing issues, and fostering alignment with frontend, mobile, and DevOps counterparts. Additionally, they will own and deliver impactful backend features that support major product goals and contribute to the platform&rsquo;s long-term growth.</p><p><b>
Location &amp; Work Mode:</b></p><ul><li>
Options: Turkiye or Greece</li><li>
Fully Remote - If only in Greece: When hiring in Greece, we&rsquo;re open to candidates from all locations. Those based within 55 km of our Athens office will follow a hybrid work model. For candidates located beyond that radius, a fully remote arrangement is available.</li></ul><b>
The fellowship you&rsquo;ll be joining:</b><p>
The new joiner will be part of a lean software engineering team composed of three members: one Senior Backend Developer, one Mid-Level Frontend Developer, and one Mobile Developer. In this role, they will collaborate closely not only with their immediate teammates, but also with key stakeholders across the organization, including the Content Engineering team, Sales team, Infrastructure, and the broader Engineering team, all of whom play a critical role in supporting the product and its customers. This position will report directly to the Sr. Director of Engineering.</p><ul><li><b>️ Technology tools &amp; weapons you&rsquo;ll be using:</b></li></ul><ul><li>
Django Framework (Python language)</li><li>
Docker</li><li>
Apache Kafka</li><li>
Redis</li><li>
Git</li></ul><b>
Interesting resources you should check:</b><ul><li>
Take a look at LetsDefend Website</li><li>
Hack The Box + LetsDefend: Shaping the future of community-led cyber readiness</li></ul>
<b>The adventures that await you after becoming Senior Django Engineer:</b><ul><li>
Optimize backend performance by improving API responsiveness, refining database queries, and enhancing caching strategies.</li><li>
Design scalable backend architectures and influence long-term technical direction across multiple products and services.</li><li>
Implement high-quality, maintainable code with strong test coverage and adherence to best practices.</li><li>
Refactor legacy components into clean, modular, and future-ready services that accelerate development.</li><li>
Collaborate closely with frontend, mobile, DevOps, and product teams to ensure smooth execution of cross-functional projects.</li><li>
Lead technical discussions, produce clear design documents, and guide the team on architectural patterns.</li><li>
Troubleshoot production issues rapidly and improve system reliability through monitoring, logging, and error reduction.</li><li>
Deliver high-impact backend features that directly support product growth, user engagement, and business goals</li></ul><b>
Skills, knowledge, and experience points required to unlock the role of Senior Django Engineer:</b><ul><li>
Expert-level proficiency in Django &amp; Django REST Framework, including ORM optimization, class-based views, and advanced API design.</li><li>
Hands-on experience with asynchronous task processing, ideally Celery + Redis/RabbitMQ, and deep understanding of reliability patterns.</li><li>
Ability to design scalable backend architectures, including caching layers, service boundaries, and performance bottleneck prevention.</li><li>
Solid understanding of backend security practices, including authentication, authorization, rate-limiting, and secure data handling.</li><li>
Proven track record of owning and delivering complex backend features, including writing technical designs and mentoring other engineers.</li><li>
Good knowledge of English language (verbal and written)</li></ul><p>
Bonus points:</p><ul><li>
Experience with AWS or other cloud platforms</li><li>
Knowledge of Docker or containerization</li><li>
Exposure to event streaming technologies such as Apache Kafka</li></ul>
️ What your adventure will have in store:<ul><li>
You'll have the exhilarating opportunity to contribute to a product that is highly appreciated by users and the cybersecurity community at large.</li><li>
You'll experience a highly supportive and caring environment, fostering growth, flexibility, and autonomy.</li><li>
You'll embark on an exciting journey of continuous learning and problem-solving, leveling up as our organization grows.</li><li>
Most importantly, you'll have a blast at HTB because fun is an essential ingredient in our recipe for success! Just wait until you see our global meet-ups!</li></ul>
The gems you&rsquo;ll be enjoying as a Senior Django Engineer:<ul><li>
25 annual leave days</li><li>
Paid paternity leave</li><li>
Dedicated budget for training and professional development, participation in conferences</li><li>
Full access to the Hack The Box lab offerings; so you can learn how to hack
</li><li>State-of-the-art equipment (mac, iPhone, and mobile plan)</li></ul><p>
Our benefits package is designed to provide strong support to our team, but it may vary depending on location and type of employment (e.g., UK, Greece, or engagement through an Employer
</p><b>️ The Quest of Becoming </b>Senior Django Engineer:<ul><li>
Level 1: To complete level one&rsquo;s objective, submit your application.</li><li>
Level 2: Meet the Talent Acquisition team. Level&rsquo;s objective: highlight your past achievements, ambitions, and values.</li><li>
Level 3: Meet the hiring team. Level&rsquo;s objective: connect with the hiring team and share with them your achievements.</li><li>
Level 4: Meet the hiring team, once again, to explore your leadership mindset and values alignment with HTB.</li><li>
Level 5: Congratulations! Not many reach this level . Level&rsquo;s objective: have a constructive, final conversation with senior leadership to explore the role and your future at HTB.</li><li>
Level 6: You've officially received an offer from HTB! To complete the last level and the Quest, all you need to do is accept the offer.</li><li>
Quest complete. Congratulations, you&rsquo;re officially one of us Your next quest: complete the onboarding.</li></ul><p><b><br>
Hack Your Career, Today. Join us in this epic adventure of cybersecurity at Hack The Box!
</b></p>ABOUT HACK THE BOX<p>
Hack The Box is the leading cybersecurity readiness and upskilling platform, trusted by enterprises, government organizations, and MSSPs to build cyber resilience at scale. Through AI-enhanced intelligence, gamified labs, live-fire simulations, and the power of one of the world&rsquo;s largest cybersecurity communities, Hack The Box helps teams master offensive and defensive skills in real-world scenarios. Founded in 2017, Hack The Box has grown its global community of over 4 million members, helping organizations validate resilience, mitigate breach risk, and develop cyber talent. For more information, visit hackthebox.com</p><p>
Rapidly growing its international footprint and reach, Hack The Box is headquartered in the UK, with additional offices in the US, Australia, and Greece.</p><p><b>
News &amp; Resources:</b></p><ul><li>
Get the most important updates on HTB&rsquo;s latest year!</li><li>
We&rsquo;re incredibly proud to share that our headquarters in the UK, along with our entities in Greece and the US, have been certified as a Great Place to Work for three consecutive years (2023 - 2025).</li><li>
In addition, our Greek entity has been recognized among the Best Workplaces in Greece (4th, 2nd, 3rd) and Europe (7th, 10th, 73rd) during this period &mdash; a testament to our strong culture and commitment to creating an exceptional employee experience!</li></ul><p></p><p>
Take a sneak peek at how it is to be part of HTB and our 2023 Global Retreat. Get more insights about our HTB culture and employee experience by visiting the &ldquo;about us&rdquo; section of our site, our career site, and Glassdoor.</p><p></p><p><i>
At Hack The Box, we are committed to fostering a diverse, inclusive, and equitable workplace. We believe that diversity enriches our performance, services, and the communities we serve. As such, we ensure that all job applications are considered solely based on merit, skills, and qualifications. We do not discriminate on grounds of race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. We are dedicated to providing a fair and respectful work environment that reflects our values.</i></p></div>

Senior Django Engineer

Codefirst Information Tech

<p>Java Software Developer (3+ Years Experience)</p><p><b>Location:</b> Hybrid / Remote<br/><b>Company:</b> CodeFirst</p><p>Position Overview</p><p>We are looking for a <b>Java Software Developer with at least 3 years of experience</b> to join our engineering team. The ideal candidate will have strong experience in <b>Spring Boot and microservices architecture</b>, and will contribute to the development of scalable, high-performance backend systems.</p><p>You will work with modern technologies, participate in system design discussions, and help build reliable software products used by enterprise clients.</p><p>Responsibilities</p><ul><li>Design, develop and maintain <b>Java-based backend applications</b></li><li>Develop and maintain <b>microservices using Spring Boot</b></li><li>Build scalable and maintainable RESTful APIs</li><li>Collaborate with frontend developers, DevOps engineers and product teams</li><li>Write clean, testable and maintainable code</li><li>Participate in <b>code reviews and architecture discussions</b></li><li>Troubleshoot and resolve performance or production issues</li><li>Contribute to continuous improvement of development processes</li></ul><p>Required Skills (Must Have)</p><ul><li><b>3+ years of professional experience in Java development</b></li><li>Strong experience with <b>Spring Boot</b></li><li>Experience developing <b>microservices architectures</b></li><li>Experience with <b>RESTful API development</b></li><li>Knowledge of <b>SQL databases</b> (MySQL / PostgreSQL or similar)</li><li>Experience with <b>Git version control</b></li><li>Understanding of <b>software design patterns and clean architecture</b></li><li>Experience with <b>Docker or container-based environments</b></li><li>Good problem-solving and analytical skills</li></ul><p>Nice to Have</p><ul><li>Experience with <b>Kubernetes</b></li><li>Experience with <b>message brokers</b> (Kafka, RabbitMQ, etc.)</li><li>Knowledge of <b>NoSQL databases</b> (MongoDB, Redis)</li><li>Experience with <b>CI/CD pipelines</b></li><li>Experience working with <b>cloud platforms</b> (AWS, GCP, Azure)</li><li>Familiarity with <b>event-driven architectures</b></li></ul><p>Qualifications</p><ul><li>Bachelor's degree in <b>Computer Engineering, Software Engineering, or related fields</b></li><li>Strong communication skills</li><li>Ability to work in an <b>agile development environment</b></li></ul><p>What We Offer</p><ul><li>Opportunity to work on <b>challenging and scalable software projects</b></li><li>A collaborative and engineering-focused environment</li><li>Flexible working conditions</li><li>Continuous learning and professional development opportunities</li></ul><p>İş T&uuml;r&uuml;: Tam zamanlı</p><p>Maaş: 60.000,00TRY - 120.000,00TRY aylık</p>

Software Developer

<div><div><p>We are looking for a highly experienced and technically strong<b> Software Architect </b>to<b> </b>join our backend team.<br>
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<b>Software Architect</b> is responsible for designing and evolving the technical architecture of backend services, with a primary focus on Java, Spring Boot, distributed systems, and domain-oriented design. In this role, you will translate complex business and product requirements into scalable, maintainable, and high-quality architectural solutions, ensuring long-term sustainability, performance, and reliability across systems.<br>
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As a Software Architect, you will collaborate closely with engineering teams, product managers, QA, DevOps, and peer architects to establish architectural standards, guide best practices, and ensure alignment across teams. You will drive the design of modular and scalable backend systems, oversee service architecture, APIs, data flows, and integration patterns, and ensure that software solutions are secure, observable, and aligned with both business and engineering objectives.</p>
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If you are curious by nature, adaptive, collaborative, and always one step ahead, then join us and be a Commencer!</b></p>
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<h3 class="jobSectionHeader"><b>Responsibilities
</b></h3><ul><li>Providing active hands-on architectural guidance and leadership through the entire lifecycle of backend products and services</li>
<li>Designing backend architectures using Java, Spring Boot, and related technologies in alignment with scalability, maintainability, performance, and security goals</li>
<li>Defining and evolving domain structures, bounded contexts, service decomposition strategies, and modular architecture approaches including modular monolith and microservices where appropriate</li>
<li>Collaborating closely with other architects, engineering managers, and development teams across the organization in architecting and delivering robust backend solutions</li>
<li>Structuring and delivering technical documentation for HLDs, architecture decision records, solution designs, analysis inputs, API contracts, sequence diagrams, and backend design artifacts, and establishing standard practices for co-workers to adapt easily</li>
<li>Investigating and assessing emerging technologies, backend frameworks, and architectural patterns to determine the best approach for product and platform needs</li>
<li>Defining non-functional requirements from availability, scalability, security, observability, extensibility, and operational support perspectives, and designing backend solutions to meet those requirements</li>
<li>Supporting teams in troubleshooting system-level backend, integration, performance, data consistency, and production issues</li>
<li>Designing and guiding API-first, event-driven, and asynchronous integration patterns between internal and external systems</li>
<li>Driving architectural decisions for distributed systems including resilience, retries, idempotency, fault tolerance, transaction boundaries, caching, and messaging patterns</li>
<li>Reviewing and improving service boundaries, backend code structure, data access patterns, deployment architecture, and technical debt areas</li>
<li>Developing and leading proof-of-concept projects for backend frameworks, platform capabilities, and architectural improvements</li>
<li>Driving discussions with senior co-workers regarding trade-offs, best practices, project delivery risks, and backend modernization strategies</li>
<li>Cross-training peers and mentoring teammates on software design principles, backend architecture patterns, and engineering standards</li>
<li>Conducting code reviews and design reviews, and providing feedback to team members with a focus on backend quality attributes and architectural sustainability</li>
<li>Assisting in technical audits and ensuring audit recommendations are implemented in line with secure software development and platform standards</li>
</ul><h3 class="jobSectionHeader"><b>Qualifications
</b></h3><div><ul><li>BSc/MSc degree in Computer Engineering, Software Engineering, or a related field</li>
<li>8+ years of experience in backend software development, with strong hands-on experience in Java and Spring Boot</li>
<li>3+ years of experience in design and implementation of complex distributed backend systems and software architectures</li>
<li>2+ years of experience in a similar position guiding a cross-functional project or product team</li>
<li>Strong experience in backend service design, API architecture including REST, GraphQL, and gRPC, service-to-service communication, and integration patterns</li>
<li>Strong knowledge of software architecture patterns such as layered architecture, hexagonal architecture, clean architecture, modular monoliths, and microservices</li>
<li>Experience with domain-driven design, domain modeling, and designing systems across different domain structures and business capabilities</li>
<li>Experience with containerization and orchestration frameworks such as Docker and/or Kubernetes</li>
<li>Working knowledge of application and system availability, scalability, observability, and distributed data platforms</li>
<li>Expertise in backend performance optimization, transaction management, concurrency handling, and scalable system design</li>
<li>Experience with relational database design, SQL optimization, and data consistency patterns, with additional familiarity in non-relational and NoSQL databases</li>
<li>Experience with messaging and streaming technologies such as Kafka, RabbitMQ, or similar platforms</li>
<li>Expert-level understanding of CI/CD principles, knowledge of various tools, and strong focus on engineering quality gates and delivery practices</li>
<li>Knowledge of cloud services, especially AWS and related AWS services</li>
<li>Strong understanding of secure backend development practices including authentication, authorization, secure communication, and secrets/configuration management</li>
<li>Strong unit testing, integration testing, debugging, and root cause analysis skills</li>
<li>Prior experience with SCRUM/Agile methodologies</li>
</ul></div><div><b>Why Commencis?</b></div>
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<div>We want people to thrive at Commencis. Here&rsquo;s what Commencers like about working here:</div>
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<div><b>Competitive Compensation &amp; Benefits:</b> We offer a competitive salary, private health insurance, pension and retirement plans through a company-backed pension system, meal card, commute compensation, work-from-home support, and a paid birthday off.</div>
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<div><b>Happier Weekdays:</b> We offer flexible working hours, including a remote working option. Enjoy online events, guest speakers, office refreshments, a meeting-light culture, and many more perks to enhance your weekdays.</div>
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<div><b>Never Stop Learning:</b> We support learning and development programs for almost anything. Additionally, we provide access to leading online e-learning platforms like Udemy and various libraries.</div>
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<div><b>Community &amp; Socials:</b> We are a tight-knit community that loves gathering together. Our social activities include happy hours, workshops, a New Year party, breakfast &amp; lunch get-togethers, movie nights, and our Summer Festival.</div>
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<div><b>Open Culture:</b> We maintain a flat organizational structure with a culture of direct and open communication. We value Commencers&rsquo; voices and address any suggestions and questions you may have.</div><br>
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<div><b>About Commencis</b></div>
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<div>Join us in paving the way for a thriving digital society!</div>
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<div>Commencis has more than two decades of expertise in the world of experience design, software engineering and cloud technologies. Our products and solutions are used by leading brands in financial services, insurance, airlines and retail in more than 20 countries.</div>
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<div>We help our clients around the globe to commence their next evolution and pave the way for a thriving digital society. We love discovering what&rsquo;s next. We value collaboration, curiosity, and an open mindset at work.</div>
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<div>If you share the same passion with our fellow Commencers, then let us unleash your world-class potential!</div>
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<div><b>We will process your personal data as part of our recruitment procedures. To find out more, please consult our </b><b>Candidate Privacy Notices</b><b>.</b></div>
<p>
We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.</p></div>

Software Architect (Backend)

Explore 63+ Software engineer in Istanbul this March. Find roles across top companies and apply now to boost your career.