Backend Developer (.NET, High-Load / Event-Driven)

Betinvest is an international product company in the sports technology sector. For over 20 years, we have been creating innovative solutions for the iGaming industry, with a focus on esports, fast sports, and AI-driven products.

Our focus is building scalable infrastructure for sports data aggregation, event processing, and partner integrations. We develop high-performance systems that power betting, trading, and analytics platforms across multiple markets.

About the Role

We are looking for a strong Backend Developer with experience in high-load, distributed systems to help us scale and evolve our real-time event-driven platform.

You will work on core infrastructure components that directly impact system stability, latency, and scalability.

Responsibilities

• Maintain and enhance existing backend systems
• Design and implement new transport layers (RabbitMQ / TCP / REST API)
• Implement and maintain the Outbox pattern
• Ensure message delivery guarantees (at-least-once)
• Optimize system throughput and reduce latency
• Handle concurrent data access scenarios
• Optimize SQL queries and indexing strategies
• Implement monitoring and metrics collection via Redis
• Develop and maintain long-running worker services (BackgroundService)

Requirements

• 3+ years of commercial experience with ASP.NET Core
• Strong understanding of asynchronous programming in .NET (async/await, concurrency, thread pool)
• Hands-on experience with RabbitMQ, including:
  
  • Exchange types (direct / topic)
  • Routing
  • Durable queues
  • Acknowledgements
  • Retry / dead-letter queues
• Experience working with Redis (counters, TTL, caching)
• Understanding of idempotency principles
• Solid knowledge of SQL Server:
  
  • Indexing
  • Isolation levels
  • Transactions
• Experience implementing BackgroundService / worker services

Nice to Have

• Experience with high-load distributed systems
• Understanding of the CAP theorem
• Practical experience implementing exactly-once / at-least-once delivery semantics
• Experience optimizing GC and memory allocation
• Performance profiling experience
• Application-level TCP protocol implementation

We Offer:

• 30 paid days off per year
• Medical insurance or a gym membership
• Free corporate English courses
• Flexible work schedule, full-time position without excessive bureaucracy, micromanagement, or time tracking
• A great team of creative and inspiring professionals