Senior Full-Stack .NET Engineer

Role Description

As a Senior Full-Stack .NET Engineer, you will play a critical role in designing, developing, and maintaining enterprise-level applications across our backend stack based on .NET, Node.js, Go and related technologies. You will lead technical discussions, mentor junior team members, and collaborate with cross-functional teams to deliver scalable and robust software solutions that meet business requirements and industry standards. This role offers the opportunity to make a significant impact, shape product direction, and contribute to the growth and success of the team.

What you’ll drive:

• Architecture & Execution
  • Design and implement scalable, efficient, and secure enterprise-level software architectures across our .NET stack.
  • Write, test, and debug complex code for high-load systems with strict latency and reliability requirements.
  • Deliver clean code to production in a timely manner, balancing business speed with technical excellence.
  • Identify and eliminate performance bottlenecks across CPU, memory, I/O, and database layers.
• Engineering Quality & Observability
  • Conduct thorough code reviews to enforce strict code quality, security, and industry best practices.
  • Develop and enforce testing protocols to guarantee software reliability and flawless production performance.
  • Implement and monitor production observability frameworks, including logging, metrics, monitoring, and distributed tracing.
  • Create and maintain concise, meaningful technical documentation for system designs and architecture.
• Collaboration & Leadership
  • Provide guidance and mentorship to junior and mid-level engineers, actively fostering their technical growth.
  • Partner with Delivery Managers to lead and manage software development projects, ensuring predictable, high-quality delivery.
  • Collaborate closely with product management, design, and operations teams to align technical execution with business goals.
  • Communicate effectively with stakeholders, translating complex technical concepts into clear project updates.

Qualifications

• Minimum 5 years of experience in a similar senior engineering role with a track record of leadership, strong technical skills, and successful project delivery.
• Deep hands-on expertise in C# and .NET (Core / .NET 6+).
• Commercial experience or a strong willingness to learn and work with Golang and Node.js.
• Experience designing and evolving high-load backend systems with strict latency and reliability requirements.
• Experience working with REST API and web services.
• Strong understanding of async/await, multithreading, thread safety, memory management, and performance optimization.
• Ability to identify and eliminate performance bottlenecks across CPU, memory, I/O, and database layers.
• Experience designing and operating microservice-based systems.
• Experience working with relational and non-relational databases.
• Understanding of transactions, isolation levels, locking, concurrency, indexing strategies, and performance tuning.
• Experience working with containerized environments including Docker and Kubernetes.
• Understanding of CI/CD pipelines and automated delivery.
• Understanding of scalability, load balancing, auto-scaling, and disaster recovery.
• Understanding of production observability including logging, metrics, monitoring, and tracing.
• Intermediate+ English level.

Benefits

• Benefits Cafeteria — annual budget you allocate to: Sports, Medical, Mental health, Home office, Languages.
• Paid maternity/paternity leave + monthly childcare allowance.
• 20+ vacation days, unlimited sick leave, emergency time off.
• Remote-first + tech support + coworking compensation.
• Team events (online/offline/offsite).
• Learning culture with internal courses + growth programs.

Company Description

GR8_TECH builds B2B iGaming platforms for operators who play to lead. We deliver full-cycle, high-impact tech designed to scale — from seamless integrations and expert consulting to long-term operational support. Our platform powers millions of active players and drives real business growth. Call it what it is: the iGaming Platform for Champions.

With 1000+ GR8 people across locations and time zones, we don’t just ship technology — we help operators build success stories across brands, markets, and geos.

Our ambition drives us. Our people make it real.