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September 17, 2026
Java Integration Developer
Senior • On-site
Warsaw, Poland
Apply now
Quick Facts
Role: Java Integration Developer
Work model: Contract (B2B)
Start: ASAP
Duration: 3 months, with possibility to extend to 6 months
Team setup: Work within or closely with Scrum teams
Description
Design and implement Java-based integration solutions, including synchronous and asynchronous workflows, using Spring Boot 3 / Spring Cloud and Apache Camel 4. Deliver reliable integrations by applying Enterprise Integration Patterns, covering error handling, idempotency, transactional behavior, and secure inter-system communication.
Responsibilities
Design and implement integration solutions using Apache Camel
Apply Enterprise Integration Patterns (EIP)
Develop synchronous and asynchronous system integrations
Integrate systems using SOAP, REST, and JMS with message brokers
Support integration reliability: error handling, idempotency, and transactions
Work with distributed systems and application integration architecture
Ensure secure communication via HTTP/HTTPS and SSL/TLS
Requirements
Minimum 5 years of commercial Java development experience
Strong knowledge of Java 17+
Hands-on experience with Spring Boot 3 or Spring Cloud
Hands-on experience with Apache Camel 4
Strong understanding of Enterprise Integration Patterns (EIP)
Experience designing and implementing synchronous and asynchronous integrations
Experience integrating systems using SOAP, REST, JMS, and message brokers
Knowledge of integration reliability: error handling, idempotency, transactions
Understanding of distributed systems architecture and application integration
Strong knowledge of PostgreSQL and SQL
Experience working with Docker
Practical experience with Kubernetes
Experience creating and maintaining unit and integration tests
Knowledge of HTTP/HTTPS, SSL/TLS, and secure communication between systems
Knowledge of SOLID, design patterns, and software engineering best practices
Ability to independently analyze problems and design technical solutions
Benefits
B2B contract
Start ASAP
3-month engagement with possible extension to 6 months
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