Senior Java Developer - Post-Trade Client Booking SystemWrocław, Poland | Hybrid: 3 days per week in officeOverview:Our client is seeking an experienced Java developer to join and help lead their team building a greenfield post-trade client booking system. This is a strategic, multi-year initiative to transform how trades are booked and processed across our client's global operations.About the Project:Our client is developing a cutting-edge system to handle post-trade booking processes - capturing and processing trades after execution. This greenfield platform will replace existing systems across multiple regions, starting with the United States, followed by APAC and EMEA.Project Timeline: Test run scheduled in the coming months US production rollout planned for next year Subsequent implementation phases in APAC and EMEA regions The Opportunity:This is a rare opportunity to be part of a large-scale, multi-year transformation program with a substantial pipeline of work. As an experienced developer, you'll have significant impact on both the technical architecture and system functionality, helping to shape a mission-critical platform from the ground up.Key Responsibilities: Lead development efforts on the greenfield post-trade client booking system Influence and contribute to architectural decisions and system design Develop high-performance, concurrent Java applications using Spring Boot Collaborate with cross-functional teams across US, APAC, and EMEA regions Participate in testing phases and production readiness activities Support the European regional implementation Mentor team members and promote best practices Work on a large pipeline of features and enhancements Required Skills: Java - Strong, hands-on experience with modern Java development Spring Boot - Proven expertise building enterprise applications Concurrency - Deep understanding of multi-threaded programming and concurrent systems Nice to Have Skills:Technical: Garbage Collection - Understanding of JVM memory management and GC tuning RabbitMQ / Kafka - Experience with message queuing and event streaming platforms Postgres - Knowledge of PostgreSQL database development Kubernetes - Experience with container orchestration and cloud-native deployments Business Domain:Post-Trade Operations - Understanding of trade booking, settlement, or post-trade processingWhat They're Looking For: Experienced Java developer with leadership capabilities Proven track record of influencing architecture and design decisions Experience with greenfield projects and modern technology stacks Strong problem-solving skills and attention to detail Collaborative mindset to work effectively across global teams Ability to work on long-term, strategic initiatives Willingness to support phased rollouts across multiple regions Why Join?: Leadership Opportunity - Help lead the team and shape technical direction Greenfield Project - Build a modern system from scratch with the latest technologies Strategic Impact - Work on a mission-critical platform that will serve the organisation globally Multi-Year Program - Job security with a large pipeline of work Global Exposure - Collaborate across US, APAC, and EMEA Flexible Working - Hybrid model with 3 days per week in office Growth Potential - Join at an exciting phase as we move from development to production