backend developer specialist

Sürat Kargo

<div>
 
 
 Qualifications &amp; Skills
 
 
 
 
 
 <ul>
 <li>
 Bachelor&rsquo;s degree in Computer Engineering, Software Engineering, or a related technical field
 </li>
 <li>
 Minimum 5 years of hands-on experience in backend software development
 </li>
 <li>
 Strong expertise in .NET Core, C#, Web API, and Entity Framework Core
 </li>
 <li>
 Solid understanding and practical experience with Clean Architecture and Domain Driven Design (DDD) principles
 </li>
 <li>
 Proven experience in designing scalable, high-performance, and maintainable backend systems
 </li>
 <li>
 Strong proficiency in MS SQL (required); experience with PostgreSQL and/or MongoDB is a plus
 </li>
 <li>
 Hands-on experience with Elasticsearch, including indexing, search optimization, and performance tuning
 </li>
 <li>
 Experience working with Redis and other distributed systems concepts (caching strategies, pub/sub, data consistency)
 </li>
 <li>
 Good knowledge of microservices architecture and RESTful API design
 </li>
 <li>
 Experience with cloud platforms such as Azure and/or AWS is an advantage
 </li>
 <li>
 Proficient in Git-based version control systems (Git, GitHub, GitLab)
 </li>
 <li>
 Basic knowledge of React or Angular is a plus
 </li>
 <li>
 Strong analytical thinking, problem-solving, and architectural decision-making skills
 </li>
 <li>
 Excellent communication skills and ability to collaborate effectively within a team
 </li>
 <li>
 Proactive, ownership-driven, and results-oriented mindset
 </li>
 <li>
 Fluent in English, capable of working with global and cross-functional teams
 </li>
 </ul>
 
 
 
 
 
 Key Responsibilities
 
 
 
 
 
 <ul>
 <li>
 Design, develop, and maintain scalable and high-performance backend and/or frontend applications aligned with business objectives,
 </li>
 <li>
 Take ownership of end-to-end software development lifecycle &mdash; including analysis, design, implementation, testing, deployment, and maintenance,
 </li>
 <li>
 Collaborate closely with business analysts, architects, project managers, and other development teams to deliver effective and innovative solutions,
 </li>
 <li>
 Participate in architectural design and decision-making processes to ensure system scalability, performance, and maintainability,
 </li>
 <li>
 Conduct code reviews to uphold coding standards, best practices, and maintain code quality across projects,
 </li>
 <li>
 Proactively identify and resolve performance bottlenecks, technical risks, and system inefficiencies,
 </li>
 <li>
 Mentor junior developers and support their technical growth through guidance and code reviews,
 </li>
 <li>
 Engage in DevOps, CI/CD, and automation practices to enhance deployment efficiency and reliability,
 </li>
 <li>
 Stay current with emerging technologies, frameworks, and design patterns, continuously bringing innovation into the development cycle,
 </li>
 <li>
 Take ownership of assigned tasks and ensure delivery of clean, testable, and high-quality code within defined timelines.
 </li>
 </ul>
 
 
</div>

Backend Developer Specialist

Wide and Wise

<div>We are looking for a Frontend Developer to join our partner company!
This is a high-impact, ownership-driven position suited for experienced frontend engineers who enjoy shaping architecture, delivery processes, and the future of a product from the ground up.<h3 class="jobSectionHeader">
Key Responsibilities</h3><ul><li>
Develop and maintain cross-platform mobile applications using React Native (Expo) for both iOS and Android.</li><li>
Manage the full delivery lifecycle, including builds, testing, and publishing applications to the App Store and Google Play.</li><li>
Ensure high-quality, scalable, and maintainable frontend architecture across mobile platforms.</li><li>
Contribute to the development of a basic web back office using React.</li><li>
Collaborate closely with backend and product teams to deliver end-to-end features.</li><li>
Apply strong SDLC practices throughout development, release, and iteration cycles.</li><li>
Leverage AI-powered developer tools to improve development speed, code quality, and debugging.</li><li>
Take full ownership of frontend components from day one, with the opportunity to grow into a frontend lead role and build a team in later stages.</li></ul><h3 class="jobSectionHeader">
Qualifications</h3><ul><li>
Bachelor&rsquo;s degree in Computer Science, Engineering, or a related field.</li><li>
Minimum 3 years of professional experience as a frontend developer.</li><li>
Strong experience with React Native, preferably with Expo.</li><li>
Hands-on experience building and publishing apps for iOS and Android from a single codebase.</li><li>
Solid understanding of the delivery lifecycle, app releases, and production environments.</li><li>
Good working knowledge of React for web applications.</li><li>
Comfortable working in early-stage, fast-moving environments with high ownership.</li><li>
Curiosity and openness toward using AI tools in frontend development workflows.</li><li>
Previous experience in early-stage startups or leading frontend initiatives is a strong plus.</li></ul></div>

Frontend Developer

Kron

<div>
 
 We are looking for a Linux C Developer to develop performance critical, scalable software.
 
 
 
 
 
 Ideal candidate should have prior knowledge of the Linux operating system internals. This is an interesting position with opportunity to work on from resource constrained small embedded devices to high capacity backend servers.
 
 
 
 
 
 QUALIFICATIONS
 
 
 
 
 <ul>
 <li>
 University degree in computer engineering or related fields
 </li>
 <li>
 Knowledge of Linux kernels
 </li>
 <li>
 Good knowledge of the Linux operating system (POSIX API, IPC, resource handling, processes and threads) Expertise in system development with C
 </li>
 <li>
 Experience in programming in multithreading environment
 </li>
 <li>
 Knowledge of IP network protocols
 </li>
 <li>
 Ideally, scripting language experience in Bash, GNU Make, Python, Lua
 </li>
 <li>
 Be passionate, curious &amp; eager to learn
 </li>
 <li>
 Be a good team player
 </li>
 <li>
 Fluent in English
 </li>
 <li>
 Have strong communicational and interpersonal skills
 </li>
 </ul>
 
 
</div>

Linux C Developer

MINDPICKED

<div>
 
 MINDPICKED is a new generation recruitment firm providing companies solutions in their search for talent, and talents opportunities who wants to reach their potential.
 
 
 
 
 
 We specialize in middle and senior management recruitment in various sectors and countless job functions.
 
 
 
 
 
 We are looking for
 
 &ldquo;Mid Back End Developer&rdquo;
 
 in the cloud computing, system virtualization, and automation technologies domain for our client.
 
 
 
 
 
 
 Key Responsibilities:
 
 
 
 
 
 <ul>
 <li>
 Develop, test, and maintain backend microservices and APIs for Olympos, Sybelle, and Unified Suite platforms,
 </li>
 <li>
 Collaborate with Senior Developers and Architects to ensure modular, scalable, and fault-tolerant architecture,
 </li>
 <li>
 Implement data models, storage solutions, and caching mechanisms for high-throughput data systems,
 </li>
 <li>
 Integrate backend services with external systems (e.g., LDAP, NetBackup, Commvault, CloudStack APIs),
 </li>
 <li>
 Participate in code reviews, debugging, and optimization to ensure reliability and performance,
 </li>
 <li>
 Contribute to the design of API specifications (REST, gRPC) and maintain documentation,
 </li>
 <li>
 Implement authentication, authorization (RBAC), and licensing microservices aligned with Unified Suite standards,
 </li>
 <li>
 Work with QA and DevOps teams to support CI/CD pipelines, automated testing, and containerized deployments,
 </li>
 <li>
 Monitor and improve system performance, scalability, and resource utilization,
 </li>
 <li>
 Ensure adherence to security standards, best practices, and compliance requirements.
 </li>
 </ul>
 
 
 
 
 
 Qualifications:
 
 
 
 
 
 <ul>
 <li>
 3&ndash;5 years of professional backend development experience,
 </li>
 <li>
 Strong proficiency in Python or Go (Golang),
 </li>
 <li>
 Experience with microservice architecture and API development,
 </li>
 <li>
 Familiarity with PostgreSQL, TimescaleDB, or other relational/time-series databases,
 </li>
 <li>
 Hands-on experience with Docker, Kubernetes, and cloud-native environments,
 </li>
 <li>
 Understanding of message brokers (Kafka, RabbitMQ, or Redis Streams) for asynchronous communication,
 </li>
 <li>
 Experience integrating with identity and access management (IAM) or LDAP/AD systems,
 </li>
 <li>
 Solid understanding of version control (Git) and CI/CD practices,
 </li>
 <li>
 Strong problem-solving, analytical, and communication skills,
 </li>
 <li>
 Bachelor&rsquo;s degree in Computer Science, Software Engineering, or equivalent experience.
 </li>
 </ul>
 
 
 
 
 
 Nice to Have
 
 
 
 
 
 <ul>
 <li>
 Experience with automation, orchestration, or observability platforms,
 </li>
 <li>
 Exposure to Digital Twin architectures or data collection pipelines,
 </li>
 <li>
 Understanding of performance tuning, load balancing, and horizontal scalability,
 </li>
 <li>
 Knowledge of secure API design and data protection standards,
 </li>
 <li>
 Basic understanding of frontend technologies (React, TypeScript) for end-to-end awareness.
 </li>
 </ul>
 
 
</div>

Mid Back End Developer

Talan

<div>
 
 
 Talan &ndash; Positive Innovation
 
 
 
 Talan is an international consulting group specializing in innovation and business transformation through technology. With over 7,200 consultants in 21 countries and a turnover of &euro;850M, we are committed to delivering impactful, future-ready solutions.
 
 
 
 Talan at a Glance
 
 
 
 Headquartered in Paris and operating globally, Talan combines technology, innovation, and empowerment to deliver measurable results for our clients. Over the past 22 years, we&rsquo;ve built a strong presence in the IT and consulting landscape, and we&rsquo;re on track to reach &euro;1 billion in revenue this year.
 
 
 
 Our Core Areas of Expertise
 
 
 
 
 <ul>
 <li>
 
 Data &amp; Technologies:
 
 We design and implement large-scale, end-to-end architecture and data solutions, including data integration, data science, visualization, Big Data, AI, and Generative AI.
 
 
 
 </li>
 <li>
 
 
 Cloud &amp; Application Services:
 
 We integrate leading platforms such as SAP, Salesforce, Oracle, Microsoft, AWS, and IBM Maximo, helping clients transition to the cloud and improve operational efficiency.
 
 
 
 </li>
 <li>
 
 
 Management &amp; Innovation Consulting:
 
 We lead business and digital transformation initiatives through project and change management best practices (PM, PMO, Agile, Scrum, Product Ownership), and support domains such as Supply Chain, Cybersecurity, and ESG/Low-Carbon strategies.
 
 
 
 
 
 
 </li>
 </ul>
 
 We work with major global clients across diverse sectors, including Transport &amp; Logistics, Financial Services, Energy &amp; Utilities, Retail, and Media &amp; Telecommunications.
 
 
 
 
 Job Description
 
 
 
 
 As a
 
 Backend Spark developer
 
 , your mission will be to develop, test and deploy the technical and functional specifications from the Solution Designers / Business Architects / Business Analysts, guaranteeing the correct operability and the compliance with the internal quality levels.
 
 
 We need somebody like you to help us in different fronts:
 
 
 
 <ul>
 <li>
 You will develop end-to-end ETL processes with Spark/Scala. This includes transferring data from/to the data lake, technical validations, business logic, etc.
 </li>
 <li>
 You will use Scrum methodology, and be part of a high performance team
 </li>
 <li>
 You will document your solutions in the tools: JIRA, Confluence, ALM
 </li>
 <li>
 You will certify your delivery and its integration with other components, designing and performing the relevant test to ensure the quality of your team delivery
 </li>
 <li>
 You will work side by side with a technical specialist who will help you to improve the architecture and technical implementation of the solution in place
 </li>
 <li>
 You will collaborate with cross-functional and cross-country teams to integrate data from various sources
 </li>
 <li>
 You will develop and maintain data hub and data pipelines in microservices architecture
 </li>
 <li>
 You will collaborate with other developers to maintain and improve CI/CD pipelines
 
 
 
 </li>
 </ul>
 
 
 
 WHAT WE ARE LOOKING FOR
 
 
 
 
 <ul>
 <li>
 Bachelor's degree in Computer Science or a related field.
 </li>
 <li>
 1+ years of experience in data/software engineering (preferable in banking)
 </li>
 <li>
 Experience with Integration Solutions (using API and Microservices)
 </li>
 <li>
 Programming backend applications with BigData technologies(
 
 Apache Spark
 
 )
 </li>
 <li>
 Agile approach for software development
 </li>
 <li>
 Continuous Integration (Git, GitHub)
 </li>
 <li>
 Knowledge of SQL databases
 </li>
 <li>
 English (at least B2+)
 
 
 
 </li>
 </ul>
 
 Qualifications
 
 
 
 
 
 Preferred qualifications
 
 
 
 
 <ul>
 <li>
 Git hub actions
 </li>
 <li>
 Scala or Python
 </li>
 <li>
 Bash scripting
 </li>
 <li>
 ControlM, AirFlow
 </li>
 <li>
 Software development life cycle (HP ALM,..)
 </li>
 <li>
 Basics of cybersecurity &amp; Quality (sonar&hellip;)
 </li>
 <li>
 Basics of Cloud computing (Docker, Kubernetes, S3, Azure, AWS, EMR, DataBricks)
 </li>
 <li>
 SOA Architecture
 
 
 
 </li>
 </ul>
 
 Additional Information
 
 
 
 
 What do we offer you?
 
 
 
 
 <ul>
 <li>
 Full-time contract.
 </li>
 <li>
 Smart Office Pack so that you can work comfortably from home.
 </li>
 <li>
 Training and career development.
 </li>
 <li>
 Benefits and perks such as
 
 private medical insurance
 
 , life insurance.
 </li>
 <li>
 Possibility to be part of a multicultural team and work on international projects.
 </li>
 <li>
 
 This is a hybrid position based in Warsaw, Poland. Relocation is mandatory.
 
 </li>
 <li>
 Possibility to manage work-permits.
 
 
 
 </li>
 </ul>
 
 If you are passionate about development &amp; tech, we want to meet you!
 
 
 
 
 
 Talan Spain&rsquo;s commitment to non-discrimination based on gender, race, ideology, or any other reason, in accordance with the company&rsquo;s "Equality Plan" and the current regulations on gender equality between women and men (Royal Decree-Law 6/2019).
 
 
 
</div>

Junior Data Engineer  (Relocation to Poland)

Arena

<div>
 
 Bringing together more than 10.000 business partners with the world's leading technology brands in Turkey, Arena is the leading technology products provider in the country. The company manages a wide range of products such as information technologies, telecommunications, consumer electronics, retail and internet retailing, by following closely every development in technology.
 
 
 
 
 
 Since its establishment in 1991, Arena has been sustaining the mission of breaking new grounds with great ability to follow the rapid developments in market conditions and to anticipate consumer expectations. This is why the company has been keeping making various innovations. It is among the biggest technology companies in Turkey to deliver the right products to customers via reliable business partners.
 
 
 
 
 
 At Arena, diversity, equity, and inclusion (DEI) are central to who we are. We are committed to creating a workplace where everyone &mdash; regardless of age, gender, ethnicity, or background &mdash; can learn, grow, and thrive. DEI is not just a policy for us; it's a shared responsibility and a core part of our culture.
 
 
 
 
 
 We are looking for a skilled Software Developer who is passionate about creating scalable, high-quality systems and contributing to the evolution of modern, AI-driven products.
 
 
 
 
 
 
 Qualifications:
 
 
 <ul>
 <li>
 Bachelor&rsquo;s degree in Computer Science, Software Engineering or related engineering discipline.
 </li>
 <li>
 3+ years of hands-on experience with C# and .NET Core / ASP.NET Web API.
 </li>
 <li>
 Strong knowledge of backend architecture patterns (clean architecture, modular design, microservices).
 </li>
 <li>
 Experience with REST and GraphQL API design, security and versioning.
 </li>
 <li>
 Solid experience in database design and data access (SQL, NoSQL, Vector Databases, ORM tools).
 </li>
 <li>
 Experience with real-time and asynchronous communication (WebSocket, SignalR, message queues).
 </li>
 <li>
 Strong understanding of clean code practices and SOLID principles, applied pragmatically.
 </li>
 <li>
 Experience with testing, code quality and maintainability practices.
 </li>
 <li>
 Familiarity with Agile methodologies and CI/CD pipelines.
 </li>
 <li>
 Experience with Python and FastAPI, especially for AI-oriented or integration-heavy services.
 </li>
 <li>
 Familiarity with LLM / AI integration concepts.
 </li>
 <li>
 Comfortable working in product-oriented, fast-paced teams.
 </li>
 <li>
 Professional proficiency in English.
 </li>
 </ul>
 
 
 
 
 
 Responsibilities:
 
 
 <ul>
 <li>
 Design, develop and maintain scalable backend services and web applications.
 </li>
 <li>
 Take an active role in new product development and platform evolution.
 </li>
 <li>
 Build API-first, secure and reusable backend components.
 </li>
 <li>
 Develop real-time and asynchronous systems and external service integrations.
 </li>
 <li>
 Use AI-assisted development tools (code generation, refactoring, test generation, documentation) to improve delivery speed and quality.
 </li>
 <li>
 Contribute to architecture decisions, code reviews and engineering best practices.
 </li>
 <li>
 Prepare technical documentation and release notes.
 </li>
 <li>
 Contribute to unit testing, code quality practices and CI/CD pipelines.
 </li>
 </ul>
 
 
 
 
 &ldquo;Yapaca&gbreve;&inodot;n&inodot;z i&scedil; ba&scedil;vurular&inodot; Ki&scedil;isel Verilerin Korunmas&inodot; Kanunu (&ldquo;KVKK&rdquo;) ve ilgili mevzuat kapsam&inodot;nda otomatik yollarla i&scedil;lenecektir. Detayl&inodot; bilgi i&ccedil;in Ayd&inodot;nlatma Metnini (https://www.arena.com.tr/hakkimizda/kvkk-aydinlatma-beyannamesi) inceleyebilirsiniz.&rdquo;
 
</div>

Senior / Mid Software Developer

Trendyol Group

<div>
 
 
 ABOUT THE TEAM
 
 
 
 We&rsquo;re shaping the future of financial technology at Trendyol.
 
 
 As Trendyol&rsquo;s technology teams, we&rsquo;re not only building for today we&rsquo;re designing the financial experiences of tomorrow. From payment infrastructure and digital wallets to smart credit systems and personalized financial services, we create solutions that empower millions of users across our ecosystem.
 
 
 With Trendyol Pay, we enable fast, secure, and seamless payment journeys. Through Trendyol Finance, we develop inclusive and accessible products that simplify financial decisions.
 
 
 
 
 
 
 ABOUT THE ROLE
 
 
 
 As a Backend Developer at Trendyol, you will play a key role in designing, developing, and maintaining the core systems that power our products and services. You will work closely with cross-functional teams to deliver scalable, high-performance solutions that millions of users rely on every day. Leveraging modern technologies and best practices, you will help shape our backend architecture, ensure seamless integration with other services, and continuously improve our platforms to meet the evolving needs of our customers.
 
 
 
 
 
 
 Expected Qualifications
 
 
 <ul>
 <li>
 Team Player: Humble, lifelong learner with a customer-first mindset.
 </li>
 <li>
 Practical Knowledge: Proficient in OOP, Design Patterns, Clean Code, Software Craftsmanship culture, Refactoring, Unit, and Integration Testing.
 </li>
 <li>
 Experience: 2+ years of experience in at least one of the following languages: Java, Go, C#, Scala, Kotlin, Node.js.
 </li>
 <li>
 Database Management: Experience with relational/non-relational Database Management Systems such as PostgreSQL, Elasticsearch, Couchbase, etc.
 </li>
 <li>
 Messaging Patterns: Experience with messaging patterns like saga, outbox, and message brokers such as Kafka, RabbitMQ, etc.
 </li>
 <li>
 CI/CD Experience: Proficient in Continuous Delivery and Continuous Integration, familiar with infrastructure as code tools such as Terraform.
 </li>
 <li>
 Backend Services: Experience in building backend services using mainstream frameworks.
 </li>
 <li>
 Agile Mindset: Agile-minded team player with strong communication skills.
 </li>
 <li>
 Distributed Systems: Preferably experienced in fault-tolerant and loosely coupled distributed architectures.
 </li>
 <li>
 Containerized Experience: Experience with Kubernetes, observability, monitoring, and resource optimization is a significant plus.
 </li>
 <li>
 Language Skills: Good command of written and spoken English.
 </li>
 </ul>
 
 
 
 
 
 What We Offer
 
 
 
 A hybrid working model with flexibility &mdash; a schedule that helps you find the right balance between flexibility and team bonding, including work-from-abroad opportunities and a summer working model.
 
 
 A customizable FlexBenefits budget &mdash; Adjust your daily meal allowance, choose your health insurance package (and extend it to your spouse or children), and pick from additional benefits like fuel support or Trendyol shopping credits.
 
 
 Comprehensive wellbeing support &mdash; Take advantage of our extended health package, which includes annual mini health screenings, access to location-based in-house doctors, psychologist and dietitian support, and HPV vaccination coverage.
 
 
 Personalized training allowance and learning opportunities &mdash; Use your annual budget for any training or conference of your choice, explore our Learning Management System (LMS) anytime, and join in-person learning sessions offered throughout the year.
 
 
 Responsibility from day one &mdash; Take full ownership from the start in a culture where every voice is heard and valued.
 
 
 A diverse, international team &mdash; Collaborate with global peers across our offices in Berlin, Amsterdam, Dubai, and beyond, in a startup-spirited and collaborative environment.
 
 
 Opportunities to grow with the best &mdash; Tackle meaningful challenges, develop through hands-on experience, and grow with the support of expert guidance and global mentoring.
 
 
 Meaningful connections beyond tasks &mdash; Be part of team rituals, events, and social activities that help us stay connected and inspired.
 
 
 
 
 
 
 
 
 
 Take the Next Step
 
 
 
 If this role excites you, apply now and let&rsquo;s take the next step together.
 
 
 Want to get to know the team better first? Explore our Career Website, LinkedIn, or YouTube to learn more about #LifeatTrendyol and how we work.
 
</div>

Backend Developer

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