Java Developer

Quick Facts

• Collaboration model: 1x per week from the Warsaw office (hybrid)

• Contract: B2B (contracting)

• Rate: up to 130 PLN net + VAT per hour

Description

You will support the implementation and development of a fraud detection system for claims handling. Responsibilities include analyzing requirements, implementing solutions using configurable mechanisms and dedicated components, and building/maintaining integrations between internal and external systems via APIs and events. You will also improve quality through automated tests and apply AI/agentic AI tools across the full development lifecycle.

Responsibilities

• Participate in implementation and development of the fraud detection system for claims handling

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

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

• Evaluate standard system functionality and recommend the optimal approach (configuration vs product customization vs dedicated solutions)

• Ensure high solution quality via automated test development, and participation in integration/system testing with good software engineering practices

• Support data migration, environment integration, and preparation to launch and evolve a new claims platform

• Use AI and agentic AI tools for requirements analysis, solution design, implementation, testing, documentation, and maintenance

• Collaborate daily in an international project environment focused on knowledge sharing and effective delivery

Requirements

• Strong knowledge of Java (>5 years)

• Strong knowledge of Kafka

• Strong knowledge of Spring/Hibernate, Spring Boot, and Spring Cloud (>5 years)

• Strong knowledge of SQL (>5 years)

• Experience with quality assurance and unit/integration test frameworks (JUnit, TestNG, Spock; Testcontainers, WireMock)

• Knowledge of Domain-Driven Design (DDD) with practical application

• Knowledge of process engines and BPMN notation

• Knowledge of resilience patterns and mechanisms for services in distributed systems

• Ability to adopt AI tools in software development

• Provide services from the territory of Poland

• Hybrid work model: minimum 1 day in the Warsaw office

Benefits

• B2B contract

• Hybrid arrangement with weekly in-office presence in Warsaw

• Opportunity to work on a modern fraud detection platform in an international environment

• Use of AI/agentic AI tools in real development workflows