# Senior Java Developer > ITRex Group · Belarus (Remote) · — · Posted 2026-09-24 **Workplace:** remote **Department:** Delivery ## Description **About ITRex** **THE PLACE** ITRex - AI pioneers who build systems that actually work in the real world, not just in demos. We're 250+ people spread across the US and Europe, creating solutions for companies like Procter & Gamble and Shutterstock. We keep it simple, build it right, and focus on what works. **THE PEOPLE** We're the kind of people who don't ignore messages in Slack, who jump in to help when you're stuck on a problem, and who offer solutions instead of blame when things go sideways. We believe in openness, accountability, and having each other's backs. No office politics, no hidden agendas - just people who care about doing good work together and supporting each other to get there. **THE ROLE** We are looking for a senior Java engineer to join a team in the middle of a serious AI transformation, building a Spring Boot microservices backend on Kubernetes and bringing AI into the whole development process - so we need someone who already works this way, can judge when an AI suggestion helps versus quietly introduces a bug, and wants to help shape that practice for the team, working daily in pair programming and a cross-functional group alongside product, QA and DevOps. The engagement runs to the end of the year, with a high probability of extension **Your Responsibilities** - Design, build and own Spring Boot microservices and the Web APIs around them, from the data model through to what runs in Kubernetes - Take end-to-end responsibility for the features you ship: schema, service, API contract, tests, pipeline and the behaviour in production - Use AI assistance deliberately across the development cycle - design exploration, implementation, refactoring, tests, review - and stay accountable for everything that gets merged - Help establish the team's AI-assisted engineering practice: what works, what to avoid, where a human review gate belongs, and how new joiners get up to speed with it - Pair with other engineers on hard problems and share context instead of hoarding it - Contribute to architectural decisions on service boundaries, communication patterns and data ownership, and argue your position clearly when you disagree - Keep the build pipeline healthy: GitLab and Jenkins stages, test suites, container builds and Terraform-managed infrastructure - Review other people's code with the same care you want applied to your own - Work directly with product, QA and DevOps to turn ambiguous requirements into something shippable, rather than waiting for a fully specified ticket - As a lead, set technical direction on your part of the system and mentor the engineers around you ## Requirements **Our Expectations** - Core Java: Java 11 and Java 17, the concurrency model, collections, memory behaviour and the language features that actually changed how modern services are written - Solid, production-grade experience with the Spring Framework and Spring Boot: dependency injection, configuration, Spring Data, Spring Security, REST controllers and the testing support - Web API development: designing, versioning, documenting and evolving HTTP APIs that other teams depend on - Microservice architecture: service decomposition, inter-service communication, resilience patterns, data ownership, and an honest sense of when a microservice is the wrong answer - SQL and relational data modelling with PostgreSQL and MySQL - schema design, indexing, query tuning and migrations - Automated testing as a habit: JUnit, Mockito, integration tests and the judgement to know what deserves coverage - Maven for build and dependency management - Docker, and Kubernetes at the level of someone who deploys onto it and debugs on it - how workloads, services, config, secrets and resource limits fit together. Running the cluster itself is not your job - Terraform and infrastructure as code - CI/CD with GitLab and Jenkins: pipelines you can read, extend and fix - Practical experience with AI-assisted software development, and genuine interest in driving that practice forward inside the team - Willingness to work in pair programming - Strong communication skills and a track record in cross-functional teams; you enjoy solving problems together rather than working through tickets alone - English at B2 level or above Nice to have - Observability in practice: Grafana dashboards, Kibana and the ELK stack, Sentry for error tracking - Structured logging and alerting design - deciding what a service should say about itself and when someone should be woken up - Performance testing and profiling of JVM services under load - Experience introducing AI-assisted workflows to a team: prompt and context practices, review discipline, guardrails for generated code - Prior work in a lead or tech-lead capacity on a distributed backend ## Benefits What We Offer Why people stay First, the foundation: - Remote flexibility: Work where and how you work best - we trust you to deliver - Fair compensation: Competitive salary + benefits that matter (medical, wellness, learning) Then, the growth: - Ownership opportunities: See a problem worth solving? Own it. We back smart risks over bureaucratic safety - AI enhancement: We leverage AI to make you faster and stronger - complementing your abilities, not replacing them - Learning investment: English classes, professional development, well-being support - Career progression: Real paths up, not just sideways shuffling Finally, the people: - Responsive teammates: No ignored Slacks, no "not my problem" attitudes - Supportive culture: When you're stuck, people help. When things break, we fix them together - Human connections: Regular meetups, tech talks, and actual relationships beyond work ## Apply [Apply at ITRex Group](https://apply.workable.com/itrex-group/j/B1AD92056B/apply) --- Powered by [Workable](https://www.workable.com)