Senior Java Developer (Full-Stack / Backend)

unicrew is hiring a Senior Java Developer (full-stack/backend) to modernize a Java/JSF claim-management platform to a Spring Boot and Angular stack.

About the Position

You'll join a project migrating a Java/JSF enterprise application to a modern Spring Boot + Angular stack. The system is a claim management platform - the legacy layer (JSF, PrimeFaces, Hibernate, Oracle) is being replaced with a Spring Boot REST backend and an Angular SPA. The work is a mix of migration, validation, bug fixing, and implementing remaining features, with performance optimization and Keycloak IAM integration also on the roadmap. The client team is based in the DACH region, so regular overlap with CET business hours is expected.

Responsibilities

• Migrate backend services from legacy Spring/CXF/JSF to Spring Boot REST
• Validate and test existing functionality in the new implementation
• Fix defects introduced during migration
• Implement remaining features in the new stack
• Contribute to performance optimization efforts
• Support Keycloak integration for identity and access management
• (For fullstack candidates) Develop and maintain Angular frontend components, including work on the internal component library

Requirements

• 5+ years of professional Java development experience
• Strong Spring Boot, Spring, and Hibernate knowledge
• Hands-on experience with Oracle and relational data modeling
• Familiarity with legacy Java stacks (JSF, PrimeFaces, CXF), enough to read, understand, and migrate existing code
• Experience working with CI/CD pipelines (Jenkins, GitLab)
• Docker usage in a development or deployment context
• Upper-Intermediate English (written and spoken)
• Ability to overlap with CET business hours

Nice to Have

• Angular and TypeScript experience (fullstack profile preferred)
• Keycloak or other IAM/SSO integration experience
• German language skills, B2 level or higher
• Redmine or similar issue tracker experience
• Background in enterprise/domain-heavy applications (insurance, finance, claims, etc.)

We Offer

• Paid vacation and sick leaves in line with local standards
• Flexible working hours
• Possibility to work remotely
• Regular team buildings and company-wide trips
• Corporate lessons of English
• Medical insurance
• Support in preparation, as well as full reimbursement of professional certifications
• Corporate psychotherapist services
• Possibility to become a mentor in our corporate university
• Highly transparent processes towards compensation reviews and promotions
• Exposure to a rapidly growing, dynamic, and uniquely global industry
• Becoming part of the team that has been multiple times recognized among Top Software Development Companies according to Clutch

Locations

• Warsaw, Poland
• Kyiv, Ukraine
• Remote

Hiring Stages

1. General Interview
2. Hiring Manager Interview
3. Internal Tech Interview (Tech Session & Live Coding)
4. Job Offer Presenting & Reference Check

Apply for this Job

Tell us about yourself and attach your CV for the Senior Java Developer (Full-Stack / Backend) role.

Our Talent Acquisition & Sourcing team will review your CV and get back to you.

Prefer email? [email protected]

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Hello I’m Iryna,

Talent Sourcer

Questions about this role, or not sure it is the right fit for you? Write to me and I will be glad to help.

Message Iryna on LinkedIn

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