Senior Java Developer

Quick Facts

Role: Senior Java Developer. Work model: Hybrid in Warsaw (minimum 1 day/week in the office). Contract: B2B (1200–1360 PLN/MD).

Description

You will participate in the implementation and development of a fraud detection system for claims handling. The team builds and enhances integration solutions, delivers new functionality, and ensures high quality and reliability using microservices architecture and modern engineering practices supported by AI tools.

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 the claims system and internal/external systems
• Create solutions using APIs, events, integration services, and enterprise architecture patterns
• Analyze requirements, design solutions, fix defects, and implement development changes
• Contribute to product version planning and recommend optimal technology solutions
• Design for functional, non-functional, performance, security, and maintainability requirements
• Support data migration processes and environment integrations
• Develop automated tests and participate in integration and system testing
• Actively use AI tools and an Agentic AI approach in software development
• Participate in code review, configuration review, and integration solution reviews
• Collaborate with business, architecture, integration, testing teams, and the system provider
• Participate in Scrum events and help create deployment and integration standards

Benefits

• Work on a strategic fraud detection implementation and development project
• Real impact on the architecture and evolution of a modern platform supporting key business processes
• International project environment with experienced technology teams
• Insurance industry domain with ongoing investment in technological transformation

Requirements

• Minimum 5 years of commercial Java development
• Very good knowledge of Spring, Spring Boot, Spring Cloud, and Hibernate
• Practical experience with Apache Kafka
• Minimum 5 years of SQL experience
• Experience ensuring software quality and familiarity with test frameworks: JUnit, TestNG, Spock
• Knowledge of integration tests and tools such as Testcontainers and WireMock
• Experience applying Domain-Driven Design (DDD)
• Knowledge of OOP and Functional Programming (FP) paradigms
• Experience with application containerization
• Knowledge of process engines and BPMN notation
• Knowledge of resilience patterns for distributed systems
• Ability to use AI tools in the software delivery process