Senior Java Developer

Quick Facts

• Role: Senior Java Developer

• Project: Long-term initiative for an insurance claims platform with fraud detection

• Work model: Hybrid (Warsaw) — minimum 1 day/week in office, remaining days remote

• Contract: B2B

Description

You will join a team developing a modern platform supporting claims handling, including a fraud detection system, as part of a broader technology transformation. The project uses Java, Spring Boot, Kafka, integration solutions, and AI / agentic AI. You will work on backend development, system integrations, testing, and architecture with a focus on performance, security, reliability, and maintainability.

Responsibilities

• Develop and deploy a fraud detection system supporting claims settlement processes

• Analyze business and technical requirements and design suitable solutions

• Design, implement, and maintain integrations with internal and external systems via APIs, events, and integration services

• Develop backend solutions using Java and the Spring ecosystem

• Contribute to architecture design covering performance, security, reliability, and maintainability

• Develop unit and integration tests and participate in system testing

• Perform code reviews and ensure the quality of delivered solutions

• Use AI and agentic AI throughout development, testing, documentation, and requirement analysis

• Collaborate with business teams, architects, analysts, testers, and Data Scientists

• Work within a Scrum-based team approach

Requirements

• Minimum 5 years of experience with Java

• Minimum 5 years of experience with Spring/Hibernate, Spring Boot, and Spring Cloud

• Minimum 5 years of experience with SQL

• Good knowledge of Apache Kafka

• Practical experience with Domain-Driven Design (DDD)

• Knowledge of Object-Oriented Programming and Functional Programming

• Experience containerizing applications

• Knowledge of process engines and BPMN

• Knowledge of resilience patterns/mechanisms in distributed systems

• Experience with unit testing frameworks (JUnit, TestNG, Spock)

• Experience with integration testing (Testcontainers, WireMock)

• Knowledge of application performance diagnostic tools

• Ability to use AI tools in the development process

• Ability to provide services from Poland

• Availability to work at least 1 day per week from the Warsaw office

Benefits

• Long-term B2B cooperation

• Work on a large strategic transformation project using AI, automation, and modern architecture

• Real influence on the technical design and development of the solution

• Collaboration with an experienced, interdisciplinary team

• Hybrid model: 1 day/week in Warsaw office + 4 days remote

• Private medical care (LUX MED)

• MultiSport sports card