principal engineer - data infrastructure Jobs in Istanbul

principal engineer - data infrastructure

principal engineer data infrastructure

Sezzle

<div><p><b>The salary range for this role is negotiable, the range being $6,000-$12,500 per month (Gross in USD), based on location and experience level.
</b></p><p><b>About Sezzle:</b></p>
<p>
With a mission to financially empower the next generation, Sezzle is revolutionizing the shopping experience beyond payments, blending cutting-edge tech with seamless, interest-free installment plans that make shopping smarter and more accessible. We're not just transforming payments; we're redefining how people discover, interact with, and purchase the things they love while driving real impact on merchant sales through increased conversions and higher order values. As we continue to shape the future of fintech and retail, we're building an innovative, dynamic team passionate about creating more than just a transaction but a truly unique shopping journey. If you're excited about pushing boundaries in tech and delivering a game-changing experience for consumers and merchants alike, come join us at Sezzle and help create the future of shopping!</p>
<p><b>
Compensation</b>:</p>
<p>
For this principal development role, with 12+ years of experience, the compensation range is<b> $6,000 - $12,500 USD based on location and experience level </b>per month and in gross amount. This range acknowledges the extensive expertise, leadership capabilities, and significant contributions expected at this level, offering a competitive salary to reflect the value of advanced skills and experience</p>
<p><b>
About the Role:</b></p>
<p>
We are seeking a talented and motivated, best-in-class Principal Engineer for our Data Infrastructure. This role presents an exciting opportunity to thrive in a dynamic, fast-paced environment within a rapidly growing team, with abundant prospects for career advancement.</p>
<p>
Sezzle is growing; our data generation and consumption is growing with us at an increasing scale. Data is extremely valuable, and we want to empower the business, the engineers, and the rest of the organization to be able to read, write, and analyze large volumes of it quickly and efficiently.</p>
<p>
Sezzle is a heavy consumer of MySQL, Postgres, and Redshift, leveraging AWS tooling with Aurora RDS and DMS. We use DBT-based transformations and similar toolkits to populate a rapidly growing data lake that supports multiple data warehouses. It's scaled well with us so far, and we're looking to continue improving it, but we also want to step into new tooling and technologies.<br>
<br>
<b>What you'll do:</b></p>
<ul>
<li>End to end ownership of our database and data warehousing infrastructure, its KPIs and its SLAs, including MySQL, Postgres, CDC capture, and Redshift.</li>
<li>Lead optimizations in database and query performance.</li>
<li>Build and maintain tooling to help manage and upgrade our data infrastructure, continually improving with migrations and optimizations.</li>
<li>Partner with Development to ensure we ship solid queries against a battle-tested schema to meet the needs of our products and business.</li>
</ul><ul><li>Help Sezzle evolve our data systems beyond the current scale and stack with whatever tooling is necessary to handle processing high volumes of writes and events while performing complex ETL.</li>
<li>Evaluate and integrate new technologies, guiding the evolution of Sezzle's data infrastructure.</li>
<li>Help data engineers and analysts optimize Redshift and warehouse performance, including query tuning, modeling improvements, and cost management.</li>
</ul>
<p><b>What We look for:</b></p>
<ul>
<li><b>12+ years of experience</b> in DBA, SRE, or Data Engineering roles, with a strong track record of scaling production-grade systems.</li>
<li>Deep expertise with <b>MySQL, Postgres, AWS Redshift or similar products</b>, including performance tuning, table design, and workload management.</li>
<li>Advanced proficiency in <b>SQL.</b></li>
<li>Strong hands-on experience with data replication and ETL/ELT frameworks, especially <b>DBT</b>, <b>AWS DMS</b>, or similar tools.</li>
<li>Strong understanding of <b>data modeling</b>, distributed systems, and warehouse/lake design patterns.</li>
<li>Ability to work in a fast-paced, collaborative environment with excellent communication and documentation skills.</li>
</ul>
<p><b>Preferred Knowledge and Skills:</b></p>
<ul>
<li>Prior experience in <b>high-growth, data-intensive fintech</b> or similar regulated environments.</li>
<li>Knowledge of <b>lakehouse architectures</b> and modern stacks such as Snowflake, Databricks, Iceberg, or Delta Lake.</li>
<li>Some background in designing <b>scalable, fault-tolerant data pipelines</b> using modern orchestration tools (Airflow, Dagster, Prefect, etc.) processing anywhere from 100GB to 1 TB of new data a day</li>
<li>Familiarity with <b>streaming technologies</b> (Kafka, Kinesis, Flink, Spark Streaming).</li>
<li>High enthusiasm for using AI to be as productive as possible.</li>
</ul>
<p><b>About You:</b></p>
<ul>
<li><b>You have relentlessly high standards</b> - many people may think your standards are unreasonably high. You are continually raising the bar and driving those around you to deliver great results. You make sure that defects do not get sent down the line and that problems are fixed so they stay fixed.</li>
<li><b>You're not bound by convention</b> - your success&mdash;and much of the fun&mdash;lies in developing new ways to do things</li>
<li><b>You need action</b> - speed matters in business. Many decisions and actions are reversible and do not need extensive study. We value calculated risk-taking.</li>
<li><b>You earn trust</b> - you listen attentively, speak candidly, and treat others respectfully.</li>
<li><b>You have backbone; disagree, then commit </b>- you can respectfully challenge decisions when you disagree, even when doing so is uncomfortable or exhausting. You have conviction and are tenacious. You do not compromise for the sake of social cohesion. Once a decision is determined, you commit wholly.</li>
<li><b>You deliver results </b>- you focus on the key inputs and deliver them with the right quality and in a timely fashion. Despite setbacks, you rise to the occasion and never settle.</li>
</ul>
<p><b>Sezzle's Technology Stack:</b></p>
<ul>
<li><b>Languages: </b>Golang, Typescript, Python</li>
<li><b>Frontend: </b>Typescript - React and React Native</li>
<li><b>Backend: </b>Golang</li>
<li><b>Database: </b>MySQL, Postgres, Elasticsearch</li>
<li><b>DevOps &amp; Cloud: </b>AWS, Kubernetes</li>
<li><b>Version Control: </b>Git</li>
<li><b>CI/CD: </b>Gitlab</li>
<li><b>Testing: </b>Developer and AI-driven, focus on automated end-to-end, integration, and unit tests</li>
<li><b>Open Source:</b> Sezzle is focused on using open source, and we build what we can before buying!</li>
</ul>
<p><b>What Makes Working at Sezzle Awesome?</b></p>
<p>
At Sezzle, we are more than just brilliant engineers, passionate data enthusiasts, out-of-the-box thinkers, and determined innovators; we are skilled musicians, yogis, cyclists, chefs, golfers, dog-lovers, and rock-climbers. We believe in surrounding ourselves with not only the best and the brightest individuals, but those that are unique and purpose-driven in all that they do. Our culture is not defined by a certain set of perks designed to give the illusion of the traditional startup culture, but rather, it is the visible example living in every employee that we hire.</p>
<p>
#Li-remote #full-time</p></div>

Principal Engineer - Data Infrastructure

MetLife

<div><div><div><div><div><div>Working Schedule
</div><div>Full-Time
</div></div><div><div>Work Arrangement
</div><div>Hybrid
</div></div><div><div>Relocation Assistance Available
</div><div>No
</div></div><div><div>Posted Date
</div><div>04-Mar-2026
</div></div><div><div>Job ID
</div><div>15790
</div></div></div></div></div><div><div><div><h3 class="jobSectionHeader"><b>Description and Requirements
</b></h3></div></div><div><div><div><div><p><b>Senior Network Engineer</b></p>
</div></div><div><div><p><b>The Team You Will Join</b></p><p>
Our company is currently undergoing significant transformation across the EMEA region. We operate six regional data centers that play a key role in supporting our production environments. Historically, each region has managed its own processes and infrastructure independently. However, we are now moving toward a more unified, global operating model. The goal of this transformation is to strengthen our internal knowledge base and improve collaboration between regional and global teams. By consolidating expertise and standardizing our practices, we aim to increase efficiency and reduce duplication of effort. This shift will also allow us to provide more consistent and scalable support worldwide. This transformation also focuses on improving collaboration with our internal business partners and responding more effectively to their needs.</p><p></p><p><br>
You will join the T&uuml;rkiye IT Global Infrastructure Team, supporting 2 Data Centers.</p><p></p><p><b><br>
The Opportunity</b></p><p></p><p><br>
The Senior Network Engineer is responsible for the design, engineering, and optimization of current and emerging network technologies to support MetLife business in T&uuml;rkiye.</p><p>
This role requires expertise in many of the following network architectures, including route/switch, VPN, Load Balancing, Firewalls, Telephony, WAN acceleration, Cloud Security, Zero Trust, SDN.</p><p>
This role also covers day-to-day BAU requirements.</p><p></p><p><br>
 <b>How You&rsquo;ll Help Us Build a Confident Future (Key Responsibilities)</b>
</p><ul><li> <b>Design and planning - </b>Develop and maintain architectural blueprints for networks.</li><li> <b>Technology selection &ndash; </b>Contribute to evaluation, selection, and integration<b> of </b>modern technology solutions and ensure they meet performance and security standards.</li><li> <b>Project oversight &ndash; </b>Help lead infrastructure-related projects, ensuring successful implementation and transition from conception to completion.</li><li> <b>Security and compliance - </b>Implement security policies, conduct risk assessments, and ensure compliance with regulations and standards.</li><li> <b>Regulatory Compliance - </b>Ensure all system designs meet the required regulatory standards.</li><li> <b>Performance and optimization- </b>Monitor system performance, manage capacity, and identify areas for improvement.</li><li> <b>Collaboration - </b>Work with project managers, business leaders, and other IT professionals to align infrastructure with business goals.</li><li> <b>Documentation and standards - </b>Create and maintain comprehensive documentation for infrastructure processes and standards.</li><li> <b>Disaster recovery - </b>Develop and lead disaster recovery and business continuity planning for the Network.</li></ul><p></p><p><b><br>
What You Need to Succeed (Required Qualifications)</b></p><br>
<p></p><ul><li>
 Bachelor&rsquo;s degree in computer science, information Systems or related field preferred, or 6+ years equivalent work experience, that includes:</li></ul><br>
<p></p><ul><li>
 3+ years of IT &amp; Network Security experience working in an infrastructure or security architecture environment with proven experience with Cisco's range of products including Catalyst and Nexus Switches.</li><li>
 3+ years of hands-on experience with Layer 4 through Layer 7 technologies and expert level understanding of mainstream protocols such as TCP, HTTP, SSL, FTP and DNS.</li><li>
 2-3+ years of IT &amp; Network Security experience with focus on Firewalls, Site- Site VPN, URL filtering and Remote Access VPN.</li></ul><br>
<p></p><ul><li>
 In depth or general/working knowledge of the following technologies:</li></ul><br>
<p></p><ul><li>
Cisco Networking, including Cisco SD-WAN, Cisco LAN/Wireless, Cisco Catalyst Center</li><li>
Understanding of Micro Segmentation</li><li>
Firewalls (in general)</li><li>
SAN Fabric</li><li>
Azure networking (general knowledge)</li><li>
Global Load Balancers (general knowledge)</li></ul><br>
<p></p><ul><li>
Relevant Cisco (CCNP, CCIE, or specialist credentials) and other certifications or equivalent experience.</li></ul><ul><li>
 Solid knowledge of WAN, LAN and Wi-Fi technologies.</li><li>
 Must have strong analytical skills, excellent understanding of application and network architecture, and must be able to assess security designs independently.</li></ul><ul><li>
Strong problem-solving skills and ability to work as part of a creative team.</li><li>
Attention to detail: dedication to quality and excellent documentation skills are key.</li><li>
Team Player &amp; Hands-on work style with advanced communication and collaboration skills.</li><li>
Experience working with global teams.</li><li>
Proactive in nature: can-do attitude.</li></ul><p></p><p><br>
 <b>What Can Give You an Edge (Additional Skills)</b></p><ul><li>
Experience with Arista Networks.</li><li>
Experience working with Agile development methodologies.</li><li>
Familiarity with a wide range of network platforms.</li><li>
Familiarity of Storage Area Networks.</li></ul><br>
<p></p>
</div></div></div></div></div><div><div><div><div><div><div><p><b>Benefits We Offer</b><br>
<br>
Our benefits are designed to care for your holistic well-being with programs for physical and mental health, financial wellness, and support for families.</p><p>
We offer private health insurance for you and your family, life insurance, employer pension plan, meal and transportation allowance, as well as a work from home allowance. We also provide a cultural Heritage Day off, and &ldquo;back to school&rdquo; and &ldquo;school report day&rdquo; leaves and much more!</p></div><br>
<div></div>
</div></div><div><div><b>About MetLife</b><br>
<div></div>
<p>Recognized on Fortune magazine's list of the &quot;World's Most Admired Companies&quot; and Fortune World&rsquo;s 25 Best Workplaces&trade;, MetLife, through its subsidiaries and affiliates, is one of the world&rsquo;s leading financial services companies; providing insurance, annuities, employee benefits and asset management to individual and institutional customers. With operations in more than 40 markets, we hold leading positions in the United States, Latin America, Asia, Europe, and the Middle East.
</p><p></p><p>Our purpose is simple - to help our colleagues, customers, communities, and the world at large create a more confident future. United by purpose and guided by our core values - Win Together, Do the Right Thing, Deliver Impact Over Activity, and Think Ahead - we&rsquo;re inspired to transform the next century in financial services. At MetLife, it&rsquo;s #AllTogetherPossible. Join us!</p></div></div></div></div></div></div>

Senior Network 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

Voodoo

<div><h1 class="jobSectionHeader"><b>About Voodoo</b></h1><p>
Founded in 2013, Voodoo is a tech company that creates mobile games and apps with a mission to entertain the world. Gathering 800 employees, 7 billion downloads, and over 200 million active users, Voodoo is the #3 mobile publisher worldwide in terms of downloads after Google and Meta. Our portfolio includes chart-topping games like Mob Control and Block Jam, alongside popular apps such as BeReal and Wizz.</p><p>
This position is fully remote as long as you are willing to work in CET hours, or Barcelona-based.</p><p></p><h1 class="jobSectionHeader"><b>
Team</b></h1><p>
Our Gaming team is made up of hybrid-casual, casual, and mid-core experts. Our 'Core' games team supports internal and external studios worldwide in creating, developing, and launching new hit games, whilst our 'Live' games team focuses on delivering higher engagement on our existing and successful games.</p><p>
Joining our Gaming team means collaborating with industry experts to build the tools and infrastructure that power the next generation of hit games. You will be a key partner to our game studios, enabling them to build, iterate, and launch games more efficiently.</p><p>
You will be joining one of our Live Studios, working on <b>Hole.io</b><b>,</b><b> </b>one of Voodoo's top games.</p><p></p><h1 class="jobSectionHeader"><b>
Role</b></h1><p>
Note: This role is focused on hands-on gameplay design and quality, not team management.</p><p>
We&rsquo;re seeking a talented and seasoned Principal Game Designer who is deeply passionate about casual games and laser-focused on creating the next big hit. With extensive experience in the industry, you'll play a pivotal role in delivering fun to millions of players. As the driving force behind the game's success, you'll ensure the game reaches the highest standards of quality and innovation.</p><ul><li><p>
Own the quality bar for core mechanics, moment-to-moment interaction, and overall game feel</p></li><li><p>
Design, prototype, and refine new gameplay features and mechanics that expand the core Hole.io loop</p></li><li><p>
Iterate new and existing features &amp; parameters until achieving final quality game feel e.g. friction, bounce, suction force, camera &amp; movement easing curves, etc.</p></li><li><p>
Partner closely with engineers to implement and iterate on Unity-based gameplay systems that perform well on mobile devices</p></li><li><p>
Collaborate with level designers to ensure gameplay mechanics integrate smoothly with open 3D environments</p></li><li><p>
Identify opportunities to improve player engagement, retention, and session satisfaction through gameplay changes</p></li><li><p>
Lead rapid prototyping and iteration cycles, validating ideas through playtesting, AB tests and data analysis</p></li><li><p>
Define best practices and design guidelines for gameplay systems and interaction design</p></li><li><p>
Work with product and analytics teams to translate player data and experimentation results into gameplay improvements</p></li><li><p>
Champion simplicity, clarity, and delight in every interaction</p></li></ul><p></p><h1 class="jobSectionHeader"><b>
Profile</b></h1><ul><li><p>
7 years of experience in gameplay design, with proven track record in F2P mobile games</p></li><li><p>
Experience owning core gameplay systems from concept through launch and live ops</p></li><li><p>
Deep understanding of game feel, player control responsiveness, and interaction design</p></li><li><p>
Strong intuition for simple mechanics with high player satisfaction</p></li><li><p>
Experience designing systems driven by physics interactions, player movement, and environmental gameplay</p></li><li><p>
Ability to balance accessibility for casual audiences with meaningful gameplay depth</p></li><li><p>
Strong hands-on experience with Unity and solid understanding of its physics systems &amp; collisions</p></li><li><p>
Experience working with A/B testing and data-driven informed decision making</p></li><li><p>
Communication skills in English, both written and verbal</p></li><li><p>
Deep collaboration mindset, including excellent interpersonal and communication skills, and a positive &amp; humble mindset towards receiving, acting on, and giving feedback</p></li><li><p>
Accountability, independence, and responsibility when given ownership over your work</p></li><li><p>
Eager to become more efficient way and to improve yourself day after day</p></li></ul><p><b>
Nice-to-have:</b></p><ul><li><p>
Experience improving core loop retention through gameplay iteration</p></li><li><p>
Comfortable prototyping gameplay directly in engine and collaborating closely with engineers.</p></li></ul><p></p><h1 class="jobSectionHeader"><b>
Benefits</b></h1><p>
Competitive salary and other benefits according to the country you reside.</p></div>

Principal Game Designer (Core Gameplay) - Hole.io

<p></p><div><h1 class="jobSectionHeader"><b>About Voodoo</b></h1><p>
Founded in 2013, Voodoo is a tech company that creates mobile games and apps with a mission to entertain the world. Gathering 800 employees, 7 billion downloads, and over 200 million active users, Voodoo is the #3 mobile publisher worldwide in terms of downloads after Google and Meta. Our portfolio includes chart-topping games like Mob Control and Block Jam, alongside popular apps such as BeReal and Wizz.</p><p>
This position is fully remote CET &plusmn;2h or Barcelona-based.</p><p></p><h1 class="jobSectionHeader"><b>
Team</b></h1><p>
Our Gaming team is made up of hybrid-casual, casual, and mid-core experts. Our 'Core' games team supports internal and external studios worldwide in creating, developing, and launching new hit games, whilst our 'Live' games team focuses on delivering higher engagement on our existing and successful games.</p><p>
Joining our Gaming team means collaborating with industry experts to build the tools and infrastructure that power the next generation of hit games. You will be a key partner to our game studios, enabling them to build, iterate, and launch games more efficiently.</p><p>
You will be joining one of our Live Studios, working on puzzle games such as<b> </b><b>This is Blast!</b>, <b>Card Factory</b> etc.</p><p></p><h1 class="jobSectionHeader"><b>
Role</b></h1><p>
We are searching for the architect of our players' core gameplay experience and the engineer of our content pipeline. This is a highly autonomous, hybrid role. You will tweak blast radiuses in Unity, write scripts to automate balancing, and debate core meta-progression. You don't wait for processes; you build them to maximize speed and quality.</p><p>
You will:</p><ul><li><p>
Own &amp; Automate Pipeline: Identify bottlenecks and build scripts/tools to drastically speed up level creation.</p></li><li><p>
Hands-on Design: Build and rapidly iterate on puzzle levels with perfect progression curves.</p></li><li><p>
Game Design Influence: Prototype and balance new board mechanics, blockers, and boosters.</p></li><li><p>
Data-Driven Iteration: Define A/B tests and optimize live &quot;level orders&quot; based on analytics (win rates, churn).</p></li></ul><p></p><h1 class="jobSectionHeader"><b>
Profile</b></h1><ul><li><p>
3+ years professional level design in F2P mobile puzzles (Blast, Match-3, Merge).</p></li><li><p>
Deep Unity experience. Capable of building tools, scripting, and optimizing workflows.</p></li><li><p>
Mastery of puzzle psychology, cognitive load, and &quot;near-fail&quot; balancing.</p></li><li><p>
Proven ability to make immediate design decisions based on A/B tests and live data.</p></li><li><p>
The ideal candidate must align with Voodoo's Guiding Hiring Principles:</p><ul><li><p>
Push for Speed: Execute fast; don't wait for perfect processes.</p></li><li><p>
Act Like an Owner: Fix slow pipelines yourself; don't blame blockers.</p></li><li><p>
Fight BS: Communicate concisely and focus strictly on actionable value.</p></li><li><p>
Take Risks: Test counterintuitive mechanics to find competitive edges.</p></li><li><p>
Direct Feedback<b>: </b>Give and take candid feedback without ego.</p></li></ul></li></ul><p></p><h1 class="jobSectionHeader"><b>
Benefits</b></h1><ul><li><p>
Best-in-class compensation</p></li><li><p>
Other benefits according to the country you reside</p></li></ul></div><p></p>

Game Level Designer - Puzzle Portfolio

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

Delivery Hero

<div><b>Company Description</b><p><br>
Yemeksepeti is part of the Delivery Hero Group, the world&rsquo;s pioneering local delivery platform, our mission is to deliver an amazing experience&mdash;fast, easy, and to your door. We operate in over 70+ countries worldwide. Headquartered in Berlin, Germany. Delivery Hero has been listed on the Frankfurt Stock Exchange since 2017 and is part of the MDAX stock market index.</p><b><br>
Job Description</b><p><br>
We are looking for a dedicated<b> </b>Security Engineer to join our team. In this role, you will be responsible for protecting our organization&rsquo;s digital assets and maintaining a strong security posture. Your responsibilities will include:</p><ul><li><b>
Security Infrastructure:</b> Implementing, configuring, and managing core security solutions including EDR, DLP, DAM, PAM, and SIEM.</li><li><b>
Enhancing System Security:</b> Strengthening the security of Linux, Windows, and macOS environments.</li><li><b>
Threat Management:</b> Managing and optimizing SIEM architecture (IBM QRadar), including complex log source integrations and rule tuning.</li><li><b>
SOC and Incident Response:</b> Managing SOC processes and overseeing incident response lifecycles to effectively mitigate threats.</li><li><b>
Application Security:</b> Conducting security assessments to protect web applications and designing/implementing WAF policies.</li><li><b>
Vendor Management:</b> Collaborating with service providers to monitor and manage security services.</li></ul><br>
<b>
Qualifications</b><p><b><br>
Education:</b> Bachelor&rsquo;s degree in Computer Science, Computer/Mathematics Engineering, Management Information Systems (MIS), or a related technical field.</p><p><b>
Experience:</b> Minimum of 3+ years of hands-on experience in information security or cybersecurity.</p><p><b>
Technical Expertise:</b></p><ul><li>
Proficiency in managing EDR, SIEM (QRadar), and DLP tools.</li><li>
Strong understanding of security concepts such as asset management, vulnerability management, and network/hardware security.</li><li>
Solid knowledge of operating systems including Windows, Linux, and macOS.</li></ul><p><b>
Personal Skills:</b> Strong problem-solving abilities and the capability to communicate effectively with both internal and external stakeholders.</p><p><b>
Nice to Have:</b></p><ul><li>
Experience in payment, banking, or fintech industries.</li><li>
Knowledge of Central Bank regulations, KVKK, ISO 27001, and/or PCI-DSS standards.</li></ul><br>
<b>
Additional Information</b><br>
<ul><li>
A chance to crown your career at Yemeksepeti, Turkey's largest online quick delivery platform, that has been raising future managers and industry leaders for 20 years!</li><li>
A working environment where employee happiness is prioritized, with a strong corporate culture, passionate colleagues working together towards the same goal, and a transparent management approach!</li><li>
Project opportunities that you can run together with the employees of Delivery Hero companies in 43 countries of the world and great teachings about global industry leadership!</li><li>
Flexible work hours so that you can plan your business and social life as you wish! (Start working at any time between 08:00 and 10:00!)</li><li>
A birthday leave waiting for you the next day so you can have fun and party as much as you want on your birthday!</li><li>
Online trainings shaped by your choices, where the opportunities you can learn and improve yourself are unlimited!</li><li>
A comprehensive private health insurance that will never let you down when you need it!</li><li>
The Yemeksepeti family! Always smiling and high communication skills!</li><li>
A pre-planned orientation program so that you can capture the spirit of Yemeksepeti in the best way, get to know the brand from the inside, and always feel at home. And of course, a Buddy who will always support you in your first weeks!</li></ul><div></div><p>
Your rights arising from the processing of your personal data, within the scope of the Law on the Protection of personal data. You can find detailed information on the page of our Clarification Text at https://www.yemeksepeti.com/contents/kvkk-aday-aydinlatma-metni</p></div>

Security Engineer (Fintech)

Explore 175+ Principal engineer data infrastructure in Istanbul this March. Find roles across top companies and apply now to boost your career.