Senior Backend (C#) Platform Deveveloper
Hacksaw Studios AB · Stockholm · Tills vidare · Deadline 2026-11-30
Hacksaw Studios AB is seeking a **Senior Backend (C#) Platform Developer** based in Stockholm to build and maintain the backend systems supporting its gaming platform infrastructure. Working on-site in a central Stockholm office, the position focuses on designing and implementing robust features for a C# and ASP.NET platform, optimizing code and data structures to sustain thousands of transactions per second with low latency, and writing unit tests. The role also involves participating in code reviews, maintaining documentation, and coordinating with peers and product teams to uphold architectural and performance standards. Relocation assistance and visa sponsorship are not provided. Applicants need **strong C# backend development experience** alongside deep knowledge of SQL for high-performance schema design and efficient querying. The role requires expertise in **multithreaded programming and thread-safe design patterns**, proficiency in C# debugging for complex issues, and practical experience with caching strategies such as Redis. A solid understanding of ASP.NET is needed, though specific experience can be developed on the job. Desirable assets include a degree in computer science or a related field, familiarity with automated unit testing frameworks, front-end development experience, mentoring background, and an interest in gaming.
About us
Hacksaw Studios is a Stockholm-based game studio focused on creating innovative, high-quality gaming experiences. With a focus on performance and precision, we bring ideas to life through technical expertise and creative collaboration. We have wide distribution, and our games are played by millions of people every month by players all over the world.
We are now looking for a C# platform developer to join our growing Stockholm team. You'll be the person helping build and maintain the high-performance backend systems that power our games and platform infrastructure. You'll be solving real technical challenges that impact thousands of active users, collaborating closely with product teams, and helping ensure our platform is robust and ready for future growth.
The Role
Your key responsibilities include:
- Design & Implement Features: Build robust, scalable features for our C# / ASP.NET-based platform and supporting systems.
- Optimize Performance: Ensure code and data structures deliver high throughput, low latency, and reliable processing of thousands of transactions per second.
- Testing & Stability: Write and maintain comprehensive unit tests to ensure platform stability.
- Code Collaboration: Participate in code reviews and contribute to clean, maintainable, and well-documented code.
- Technical Documentation: Maintain clear and thorough technical documentation.
- Team Coordination: Work closely with peers and product teams to maintain architectural consistency and meet performance standards.
What We’re Looking For
- Strong experience in C# backend development.
- Solid understanding of ASP.NET (experience preferred but can be developed on the job).
- Deep knowledge of SQL, including writing efficient queries and designing high-performance database schemas.
- Practical experience with caching strategies (e.g., Redis).
- Expertise in multithreaded programming and thread-safe design patterns.
- Proficiency in using the C# debugger for troubleshooting complex issues.
- A mindset focused on performance, scalability, and reliability.
Nice-to-have:
- Experience with automated unit testing frameworks.
- A university degree in Computer Science or related field.
- Interest in gaming, professionally or recreationally.
- Experience with front-end development.
- Experience mentoring or coaching other colleagues.
What We Offer
- A modern office in central Stockholm.
- Work with experienced, passionate colleagues in the gaming industry.
- The opportunity to create games with a global audience.
- Real influence, ownership, and personal growth opportunities.
- Wellbeing perks including wellness allowance and regular in-office massage.
Practical Details
- This is an on-site position in Stockholm.
- Unfortunately, we cannot assist with relocation or visa sponsorship.
Ready to Join the Game Makers?
Apply now! We review applications on a rolling basis.