Senior Full-Stack .NET Engineer (with Node.js & Go)

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:

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.

• What makes you a GR8 fit:

• • 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 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.

• 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.