Senior Java Developer

ITRex Group

. Design, build, and own Spring Boot microservices and Web APIs from data model through Kubernetes deployment .

Posted 9/25/2026contractRemote • Belarus, PolandSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in designing and building Spring Boot microservices and Web APIs, with a strong focus on AI-assisted engineering practices and CI/CD pipelines. Proficient in mentoring engineers and collaborating across teams to deliver high-quality software solutions.

Highest-signal resume keywords

Java 11 and Java 17Spring Boot and Spring FrameworkMicroservice ArchitectureCI/CD with GitLab and JenkinsAI-Assisted Software Development

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Java 11Java 17Spring BootMicroservice ArchitectureSQLPostgreSQLMySQLJUnitMockitoTerraform

Soft Skills

Strong Communication SkillsCollaboration in Cross-Functional TeamsMentoring

Tools & Technologies

DockerKubernetesGitLabJenkinsMaven

Industry Keywords

API ContractsAutomated TestingInfrastructure as CodeService DecompositionData Ownership

Tech Stack

Tools & technologies

DockerJavaJenkinsJUnitKubernetesMavenMicroservicesMockitoMySQLPostgresSpringSpring BootSpringBootSQLTerraform

About the role

Key responsibilities & impact

Design, build, and own Spring Boot microservices and Web APIs from data model through Kubernetes deployment
Take end-to-end responsibility for features, including schemas, services, API contracts, tests, pipelines, and production behaviour
Use AI assistance across design, implementation, refactoring, testing, and code review while maintaining accountability for merged code
Establish the team's AI-assisted engineering practices, review gates, guardrails, and onboarding approach
Pair with engineers on complex problems and share context
Contribute to architectural decisions regarding service boundaries, communication patterns, and data ownership
Maintain GitLab and Jenkins pipelines, test suites, container builds, and Terraform-managed infrastructure
Review code
Collaborate with product, QA, and DevOps to turn ambiguous requirements into shippable solutions
Set technical direction and mentor engineers as a lead
Engagement runs through the end of the year, with a high probability of extension

Requirements

What you’ll need

Strong knowledge of Java 11 and Java 17, including concurrency, collections, memory behaviour, and modern language features
Production-grade experience with Spring Framework and Spring Boot, including dependency injection, configuration, Spring Data, Spring Security, REST controllers, and testing support
Experience designing, versioning, documenting, and evolving HTTP Web APIs
Experience with microservice architecture, including service decomposition, inter-service communication, resilience patterns, and data ownership
SQL and relational data modelling with PostgreSQL and MySQL, including schema design, indexing, query tuning, and migrations
Automated testing experience with JUnit, Mockito, and integration tests
Experience with Maven for build and dependency management
Experience with Docker and Kubernetes for deployment and debugging
Experience with Terraform and infrastructure as code
CI/CD experience with GitLab and Jenkins
Practical experience with AI-assisted software development
Willingness to work in pair programming
Strong communication skills and experience in cross-functional teams
English at B2 level or above

Benefits

Comp & perks

Remote flexibility: Work where and how you work best
Competitive salary and benefits including medical, wellness, and learning
Ownership opportunities
AI enhancement to complement employees' abilities
English classes
Professional development
Well-being support
Career progression opportunities
Regular meetups
Tech talks
Supportive and responsive team culture