Mid/Senior Java Backend Engineer - Insurance

TechTree; Polska; Hybrid; PLN 254,000 - 304,000; Full time

Benefits offered by this job

Private medical care

Training plan

International projects

Career path

Job summary

TechTree is seeking an experienced Java Backend Engineer to join our international team building enterprise-grade platforms for the insurance sector. You will design and implement backend services in Java/Spring Boot, focusing on financial settlement, accounting, and claims modules, with RESTful APIs and external integrations.

We value strong backend fundamentals, willingness to grow toward full-stack, and collaboration in an Agile/SAFe environment.

Qualifications

• 5+ years of commercial experience with Java and Spring Boot.
• Willingness to learn Angular (TypeScript).
• Knowledge of MongoDB and PostgreSQL/Oracle.
• Architectural thinking with SOLID and Clean Code.
• English at B2 level or higher; Polish at A1/A2.
• Openness to AI-assisted programming in Spec Driven Development.

Responsibilities

• Design and develop backend services in Java (Spring Boot) for settlement, accounting, funds, and claims.
• Build high-performance REST APIs and integrations with external providers.
• Own architecture and ensure code quality through reviews.
• Collaborate with BA, QA, Frontend, and Scrum Master in Agile/SAFe.
• Support gradual frontend involvement (Angular/TypeScript) as needed.

Skills

Java

Spring Boot

REST APIs

Design Patterns

Clean Code

Tools

Docker

ElasticSearch

Job description

You'll join an international team (Scandinavia / Belgium / Poland) building and developing proprietary, scalable Enterprise-class platforms for the global insurance sector. Our systems manage the full policy lifecycle and claims settlement processes end to end, handling millions of operations per month - including financial settlement, accounting, investment fund, and claims modules (FIN/FUN/CLAIMS).

AI on our team is an everyday engineering tool, not a marketing buzzword - we work in a Spec Driven Development paradigm: we use AI agents for technical documentation, task specification, building technical plans, and verifying and testing work.

Who We're Looking For

We're looking for an experienced Java Backend Engineer (5+ years) with a strong backend foundation who is open to gradually learning and working with the frontend (Angular) - a deliberate choice by the client: a strong backend foundation plus a willingness to grow toward fullstack over time.

What You'll Do

Design and develop backend services in Java (Spring Boot) for financial settlement, accounting, investment fund, and claims-handling modules

Build and maintain high-performance REST APIs and integrations with external service providers

Own architecture and code quality - Clean Code, design patterns, code review

Collaborate with the team (BA, QA, Frontend, Scrum Master) in Agile/Scrum/SAFe methodologies

Gradually get involved with the frontend (Angular/TypeScript) as project needs arise

What We're Looking For

5+ years of commercial experience with Java and Spring Boot

Openness to learning and working with Angular (TypeScript)

Practical knowledge of document databases (e.g. MongoDB) and relational databases (e.g. PostgreSQL, Oracle)

Architectural thinking - SOLID, Clean Code

English at B2 level or higher

Polish at A1/A2 level

Openness to AI-assisted programming in the Spec Driven Development model

Nice to Have

Experience with Docker, ElasticSearch/Kibana

Understanding of insurance product specifics, claims settlement processes, or market regulations

Practical knowledge of DDD (Domain-Driven Design) or Event-Driven Architecture

Terms of Cooperation

Work model: initial onboarding period (up to 3 months) more often from the office, eventually hybrid - 3 days office / 2 days remote

Salary: up to 25,000 PLN gross (employment contract) or B2B equivalent

B2B: paid leave (20-26 days, agreed with the Hiring Manager)

What's In It For You

Private medical care with Allianz - for you and your family

Individual training and conference plan

Participation in international projects for the financial and insurance sector

Development path: expert (technical/business) or managerial

Recruitment Process

Screening call (15-20 min)

Meeting with the Hiring Manager (60 min)