New offer - be the first one to apply!
November 3, 2026
Full-Stack Java Developer (Backend Focus)
Senior • On-site
Warsaw, Poland
Quick Facts
- Role: Full-Stack Java Developer (Backend Focus)
Description
You will design and agree technical assumptions for system changes, then implement them according to client standards while maintaining data integrity, data security, architecture quality, and operational continuity. The role includes code reviews, reducing technical debt through refactoring, supporting deployments and application module maintenance, and diagnosing issues found in UAT and production monitoring. You will also estimate effort for changes and help resolve defects.
Responsibilities
- Design and align technical assumptions for changes with focus on data integrity, data security, architecture quality, and system continuity
- Implement agreed system changes following client standards
- Perform code reviews of work delivered by the team and other developers
- Initiate and support refactoring to prevent technical debt; co-create a technical-debt register
- Support engineering efforts during deployments and during application modules maintenance
- Diagnose, analyze, and fix defects from UAT and production-monitoring issues
- Estimate development effort for requested changes
Requirements
- 4+ years of commercial development experience
- 3+ years with Java (Java 18+, Spring Boot 3+, JPA)
- 3+ years with PostgreSQL
- 2+ years with Angular (Angular 19+, TypeScript, NodeJS)
- 2+ years delivering in Agile (Scrum preferred)
- Solid knowledge of design and architectural patterns
- English knowledge to read technical documentation
- Ability to adapt quickly to change and proactively contribute ideas
- Self-organization and willingness to take ownership of task delivery
Benefits
- Work in an Agile environment with emphasis on architecture quality and long-term technology health
Similar jobs you might like

Java Full-Stack Developer (Backend Focus)
Connectis
Senior
Technology
Warsaw, Poland · On-site
0K zł - 0K zł/yr
1h ago

Senior Full-Stack Developer (Java)
Ness Solution
Senior
Technology
Warsaw, Poland · Remote
0K zł - 0K zł/yr
1h ago
Java Developer (Local DevOps)
ERGO Hestia
Mid
Technology
Gdańsk, PM, Poland · On-site
N/A
1h ago

Full-Stack Developer (Java & Angular)
j-labs
Senior
Technology
Kraków, Poland · On-site
0K zł - 0K zł/yr
1h ago

Java Developer
Billennium
Senior
Technology
Warsaw, Poland · Remote
N/A
1h ago

Full-Stack Developer (Java, Spring Boot, Angular)
Fabrity S.A.
Senior
Technology
Warsaw, Poland · Remote
0K zł - 0K zł/yr
1h ago
Java Backend Developer (Spring Boot, Integrations, Databases)
AKCENTA CZ a.s.
Mid
Technology
Hradec Králové, Czechia · Hybrid
N/A
16 days ago

Java Developer
JUSTTAG SPÓŁKA Z OGRANICZONĄ ODPOWIEDZIALNOŚCIĄ
Mid
Technology
Warsaw, Poland · On-site
14K zł - 20K zł/yr
1h ago

Java Developer (Banking)
BlueSoft
Mid
Technology
Warsaw, Poland · On-site
N/A
1h ago
Java and React Full-Stack Developer
Strategicsiq
Mid
Technology
Kraków, Poland · On-site
1K zł - 2K zł/yr
1h ago
Unlock Full Resume Report
ATS Pass
Missing keywords
Tailored AI suggestions
Job match analysis
Interview-focused insights