Senior Java Developer 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 architect and ship the high-performance backbone of our platforms. You’ll help us achieve global scalability by owning the end-to-end delivery of resilient Java-based microservices and mentoring the next generation of engineering talent. What you’ll drive: Architecture & Technical Decisions • Design and evolve scalable microservices using Java 17+ and Spring Boot. • Apply resilience patterns (Circuit Breaker, Bulkhead, Rate Limiting) to ensure systems thrive under pressure. • Evaluate and select database strategies (PostgreSQL, NoSQL, Redis) based on specific performance trade-offs. • Design event-driven architectures utilizing Kafka or RabbitMQ to handle real-time data flow. Delivery & Execution • Own the full development lifecycle—from initial requirement elicitation to production release. • Ship clean, maintainable, and highly efficient code that sets the standard for the team. • Optimize application performance by profiling JVM internals and fine-tuning garbage collection. • Unblock the release pipeline by automating testing and improving CI/CD workflows in GitLab. Quality & Reliability • Enforce "Security by Design" and secure coding practices (OWASP Top 10) across all services. • Drive continuous improvement in testing protocols, including integration, performance, and BDD. • Identify and resolve complex production bottlenecks using monitoring tools like ELK or Datadog. • Maintain comprehensive technical documentation that simplifies complex system designs for others. Team Growth & Leadership • Mentor junior and middle engineers through high-quality code reviews and technical guidance. • Partner with Product Managers and Delivery Managers to align technical roadmaps with business outcomes. • Foster an Agile culture by actively participating in planning, estimation, and iterative delivery. What makes you a GR8 fit: Must-have • 5+ years of commercial experience in Java development (Senior level). • Mastery of Spring Ecosystem (Boot, Data, Security) and Hibernate/JPA. • Deep understanding of distributed systems: Microservices, Event-driven design, and CAP theorem. • Strong Database expertise: Proficiency in complex SQL, indexing strategies, and transaction isolation. • Hands-on DevOps mindset: Practical experience with Docker, Kubernetes, and CI/CD automation. • Solid Cloud knowledge: Experience building and scaling applications in AWS (preferred). • Architecture fluency: Ability to explain design trade-offs and visualize systems using UML or similar tools. Nice-to-have • Experience with GitLab CI and Infrastructure as Code (Terraform/Ansible). • Familiarity with FinOps principles to optimize cloud resource consumption. • Background in iGaming or high-frequency Fintech environments. • Knowledge of reactive frameworks like Vert.x or Micronaut. 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.