Senior Java Backend Engineer - Spring Boot, Hybrid (Poland)

TechTree; Poznań; Hybrid; PLN 167,000 - 279,000; Full time

Benefits offered by this job

Private medical

Multisport

Training budget

Job summary

TechTree currently recruits for a Mid/Senior Java Backend Engineer to join an international team across Scandinavia, Belgium and Poland. The role focuses on building scalable, enterprise-grade platforms for the global insurance sector, with responsibilities spanning financial settlement, accounting, and claims modules.

You will design backend services in Java/Spring Boot, create high-performance REST APIs, and contribute to architecture and code quality while gradually expanding into frontend

Qualifications

• 5+ years of commercial Java/Spring Boot experience.
• Strong REST API design skills.
• English at B2 level or higher, Polish at A1/A2 level.
• Openness to AI-assisted programming (Spec Driven Development).

Responsibilities

• Design and develop backend services in Java (Spring Boot) for modules such as financial settlement, accounting, investment fund, and claims-handling.
• Build and maintain high-performance REST APIs and integrations with external providers.
• Own architecture and code quality — Clean Code, design patterns, code review.

Skills

Java

Spring Boot

REST API design

Backend architecture

Job description

TechTree currently recruits for a Mid/Senior Java Backend Engineer to join an international team across Scandinavia, Belgium and Poland. The role focuses on building scalable, enterprise-grade platforms for the global insurance sector, with responsibilities spanning financial settlement, accounting, and claims modules.

You will design backend services in Java/Spring Boot, create high-performance REST APIs, and contribute to architecture and code quality while gradually expanding into frontend