Senior / Mid Software Developer

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 — regardless of age, gender, ethnicity, or background — 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:

• Bachelor’s degree in Computer Science, Software Engineering or related engineering discipline.
• 3+ years of hands-on experience with C# and .NET Core / ASP.NET Web API.
• Strong knowledge of backend architecture patterns (clean architecture, modular design, microservices).
• Experience with REST and GraphQL API design, security and versioning.
• Solid experience in database design and data access (SQL, NoSQL, Vector Databases, ORM tools).
• Experience with real-time and asynchronous communication (WebSocket, SignalR, message queues).
• Strong understanding of clean code practices and SOLID principles, applied pragmatically.
• Experience with testing, code quality and maintainability practices.
• Familiarity with Agile methodologies and CI/CD pipelines.
• Experience with Python and FastAPI, especially for AI-oriented or integration-heavy services.
• Familiarity with LLM / AI integration concepts.
• Comfortable working in product-oriented, fast-paced teams.
• Professional proficiency in English.

Responsibilities:

• Design, develop and maintain scalable backend services and web applications.
• Take an active role in new product development and platform evolution.
• Build API-first, secure and reusable backend components.
• Develop real-time and asynchronous systems and external service integrations.
• Use AI-assisted development tools (code generation, refactoring, test generation, documentation) to improve delivery speed and quality.
• Contribute to architecture decisions, code reviews and engineering best practices.
• Prepare technical documentation and release notes.
• Contribute to unit testing, code quality practices and CI/CD pipelines.

“Yapacağınız iş başvuruları Kişisel Verilerin Korunması Kanunu (“KVKK”) ve ilgili mevzuat kapsamında otomatik yollarla işlenecektir. Detaylı bilgi için Aydınlatma Metnini (https://www.arena.com.tr/hakkimizda/kvkk-aydinlatma-beyannamesi) inceleyebilirsiniz.”