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Senior Java Developer

GR8 Tech · Anywhere

onsitefull-timesenior level

About this role

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.

About GR8 Tech

GR8 Tech is a global product company that provides innovative, scalable platforms and business solutions for the iGaming industry. We have а great experience: GR8 Tech platform successfully handles millions of active players and offers best practices to develop and grow in the gambling industry. We are here to provide great gaming tech to satisfy even greater ambition! We develop complete tech coverage for gambling businesses worldwide, including iGaming platform solutions, consulting, integration, and long-lasting operation services. We are driven by our ambition to make a great product with great people! Together we move the world of iGaming forward — join!

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