Senior .Net Developer for GR8 API Tech at Gr8tech

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. If you’re a challenger in spirit and a champion in action — join us. Why this role exists: This role exists to design, develop, and maintain enterprise-level applications using C#, ASP.NET, and related technologies. The engineer participates in technical discussions and works with cross-functional teams to deliver scalable and reliable software solutions aligned with business requirements. What you’ll drive: Software architecture & development • Design and implement scalable and efficient software architectures. • Develop and maintain enterprise-level applications using C#, ASP.NET, and related technologies. • Identify and resolve complex software issues and technical challenges. Project delivery & collaboration • Lead and manage software development projects, ensuring timely delivery and quality together with the Delivery Manager. • Work closely with product management, design, and operations teams to align development with business goals. • Communicate technical concepts and project updates to stakeholders. System stability & ownership • Participate in on-call rotations to support availability and stability of business-critical services. • Maintain technical documentation for software development and system design. • Contribute to technical discussions and propose solutions for system improvements. What makes you a GR8 fit: Must-have • 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+). • Strong understanding of async/await, multithreading, thread safety, memory management, and performance optimization. • Experience designing and evolving high-load backend systems with strict latency and reliability requirements. • 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 messaging systems and event-driven architectures. • 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. Nice-to-have • Experience with GoLang or Node.js. • Experience with Microsoft Orleans. Why you’ll love working here: Benefits Cafeteria — annual budget you allocate to: Sports • Medical • Mental health • Home office • Languages. Work-life & support • 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. Our culture & core values: GR8 Tech culture is how we win — through trust, ownership, and a growth mindset. We move fast, stay curious, and keep it real, with open feedback, room to experiment, and a team that’s got your back. FUELLED BY TRUST: we’re open, honest, and have each other’s backs. OWN YOUR GAME: we take initiative and own what we do. ACCELER8: we move fast, focus smart, and keep it simple. CHALLENGE ACCEPTED: we grow through challenges and stay curious. BULLETPROOF: we’re resilient, ready, and always have a plan.