Java Developer

Quick Facts

• Role: Java Developer (fraud detection systems for insurance claim settlement)

• Work focus: API/event-based integrations, architecture-aligned code and integration reviews, automated testing

Description

You will support the implementation and development of a fraud detection system for claims settlement, integrating internal and external components via APIs, events, and integration services. The work includes evaluating standard capabilities versus customization, designing and maintaining integrations, and performing code/configuration/integration reviews for quality, security, and architectural compliance. You will also analyze business and technical requirements and implement them using configuration mechanisms, product extensions, and dedicated components, while developing automated tests and using AI/agentic AI tools in the delivery process.

Responsibilities

• Assess standard system capabilities and recommend the optimal approach between configuration, product adaptation, and building dedicated solutions

• Design, implement, and maintain integrations between claims systems and internal/external systems using APIs, events, and integration services

• Conduct code review, configuration review, and integration solution review with tools supporting quality, security, and architectural compliance

• Analyze business and technical requirements and implement them using configuration mechanisms, product extensions, and dedicated components

• Develop automated tests and participate in integration and system testing following software engineering best practices

• Use AI and an agentic AI approach in analysis, design, implementation, and testing of solutions

Requirements

• 5+ years of experience with Java and Spring Boot

• 5+ years of experience with Spring Cloud and Hibernate

• 5+ years of experience with SQL

• Good knowledge of Apache Kafka

• Practical knowledge of Domain-Driven Design (DDD)

• Knowledge of resilience patterns for distributed systems

• Experience with application containerization

• Familiarity with unit/integration testing frameworks: JUnit, TestNG, Spock, Testcontainers, WireMock

• Fluent Polish

Benefits

• Project-based cooperation with milestone-based billing and acceptance protocols per deliverables

• Flexible B2B engagement model

• Fast and remote process

• Participation in industry events and technology meetups

• Administrative and billing support related to the collaboration

• Occasional onsite work in Warsaw (approximately 1x per week)

• Referral bonus: 5,000 PLN for recommending friends to the projects