Middle Full Stack Node.JS Developer for UBO Team 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 build, evolve, and stabilize web platforms where performance, scalability, and reliability directly impact business outcomes.You’ll help us ship and scale Node.js–based systems by owning backend and frontend components end to end — from design decisions to production delivery. What you’ll drive: Architecture & technical decisions • Design and evolve backend and frontend architecture using Node.js and JavaScript. • Apply architectural patterns (microservices, event-driven design) based on real constraints. • Design systems with failure in mind, using resilience patterns like circuit breakers and rate limiting. Delivery & execution • Build, ship, and maintain backend services and web interfaces in production. • Deliver new features end to end — from requirements to release. • Optimize applications for performance, scalability, and reliability. • Ensure high code quality through reviews, testing, and clean architecture. Quality, testing & reliability • Write and maintain unit, integration, and end-to-end tests. • Improve test coverage and reliability of existing systems. • Identify performance bottlenecks and drive optimization initiatives. • Ensure secure coding practices and basic application security. Collaboration & product delivery • Partner with product managers, designers, and engineers to deliver business outcomes. • Translate requirements into technical solutions with clear trade-offs. • Contribute to planning, estimation, and iterative delivery in Agile environments. • Share technical context and documentation with the team. Team contribution & growth • Mentor junior engineers and support technical growth within the team. • Participate in technical discussions and continuous improvement initiatives. • Stay current with modern JavaScript, Node.js, and web development practices. What makes you a GR8 fit: Must-have • 3+ years of commercial experience with Node.js and JavaScript. • Strong knowledge of modern JavaScript (ES12+), async programming, and Node.js internals. • Experience building RESTful APIs with NestJS, Express, Fastify, or similar frameworks. • Solid understanding of web fundamentals: HTTP, browser rendering, SPA architecture. • Experience with SQL databases, basic data modeling, and queries. • Hands-on experience with testing (unit/integration) and CI/CD pipelines. • Comfortable working independently and owning features end to end. • Intermediate or higher level of English, fluent in Ukrainian or Russian. • Experience with Docker and basic Kubernetes concepts. • Familiarity with event-driven systems and message-based architectures. • Exposure to cloud platforms (AWS preferred). • Experience with Webpack, module federation, and bundle optimization. • Monitoring and performance tooling (Prometheus, Grafana, ELK). 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.