Senior Java Developer
GR8 Tech
WorldwideremotePosted 1 month ago
Skill Required
Casino-CoreBackend-DevelopmentJava-DevelopmentSoftware-EngineerMicroservices-DevelopmentSenior-Java-EngineerSenior-Java-Software-EngineerSenior-Java-Developer-(Spring-Boot)Senior-Java-Full-Stack-DeveloperSenior-Full-Stack-Java-DeveloperSenior-Java-ArchitectSenior-Java-Backend-DeveloperSenior-Java-Engineer-JobsJava DeveloperJavaSystem DesignMicroservicesElasticsearchObservabilitySpring BootKubernetesPrometheusGitHub ActionsCassandradesigningsecuritybuildingdesignGitScalaKafkaRedisCloudDesign PatternsTestNGRustAPIsUnitySQLFulltime
Key highlights
- 5+ years of backend development experience required.
- Proficiency in Java 17+ and Spring Boot 3.x is mandatory.
- Annual cafeteria budget covering sports, medical, mental health, home office, and languages.
- Remote‑first work model with tech support and coworking compensation.
- Work on a high‑load, real‑money iGaming platform serving millions of players.
- Upper‑intermediate English proficiency required.
Role overview
GR8_TECH builds B2B iGaming platforms for operators who play to lead, delivering full‑cycle, high‑impact technology designed to scale—from seamless integrations and expert consulting to long‑term operational support. The platform powers millions of active players, driving real business growth, and the company’s 1,000+ people across locations help operators build success stories across brands, markets, and geographies.
Responsibilities
- Design and develop Spring Boot microservices across the casino domain: bonus processing, game launch, lobby and game catalog management.
- Implement and evolve promotional mechanics end‑to‑end — from bonus crediting and wagering logic to expiry and settlement — with correctness guarantees on real money.
- Integrate third‑party game providers, game launch, wallet callbacks (bet/win/refund), provider‑side bonus features.
- Build and evolve REST APIs consumed by internal services and external providers, including request signing, authentication, and API versioning.
- Ensure correctness of real‑money transaction and bonus flows — idempotency, retries, timeouts, graceful degradation of downstream calls.
- Work with Redis for caching and session state; tune service performance under production load.
- Own observability: metrics (Micrometer/Prometheus, Grafana dashboards), structured logging, alerting.
- Write and maintain unit, integration, and functional tests (JUnit 5, Testcontainers).
- Ship via GitLab CI to Kubernetes; participate in code review and incident investigation.
Requirements
- 5+ years of experience in back end.
- Commercial experience with strong proficiency in Java (17+) and Spring Boot 3.x (Web, Security, Data, Actuator).
- Experience building business‑critical domain logic (payments, bonuses, billing, or similar money‑adjacent flows).
- Solid experience integrating third‑party REST APIs and designing your own.
- Understanding of distributed systems basics: idempotency, consistency, timeouts, retries, caching.
- Experience with SQL and at least one NoSQL store (Redis, Cassandra, or Elasticsearch).
- Upper‑intermediate or higher level of English.
Nice to have
- Scala experience (parts of our wallet platform run on Scala / Play / Akka).
- Experience with Kafka and event‑driven architectures (some of our services use Spring Cloud Stream).
- Experience running services on Kubernetes; familiarity with GitLab CI.
- Familiarity with Prometheus and Grafana.
- iGaming / betting domain experience.
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.
Additional details
- 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: design, build, and maintain backend services across the Casino platform — bonus and promotional mechanics, wallet and transaction flows, game launch and catalog, and game provider integrations — ensuring reliability, correctness, and performance under high load.
- 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.
- Originally posted on Himalayas.