Senior Java Software Engineer - Financial Markets

Location: Katowice, 83, PL, Warsaw, Mazovia, Poland

Employment Type: Full time

ING Hubs Poland is hiring!

The expected salary for this position:

9 600 - 16 000 PLN - Engineer III
13 000 - 22 000 PLN - Engineer IV

The financial ranges specified in the announcement are adjusted and may differ from the range specified in the remuneration regulations.

Work environment

Join a high-impact engineering team delivering cutting-edge solutions for Financial Markets. We build systems used daily by sales teams, traders, and risk managers across global hubs: London, Amsterdam, Brussels, New York, and Singapore.

Our focus is on derivative products across multiple asset classes (equities, commodities, interest rates). You will contribute to platforms that automate the full trading lifecycle - from client quote requests to pricing, booking, and risk management - in highly dynamic, real-time environments.

This is a unique opportunity to work at the intersection of technology, finance, and global collaboration, where your work directly influences business decisions.

Your responsibilities:

• Design and develop robust backend services and expose them via modern REST APIs,
• Continuously improve architecture, scalability, and infrastructure, including CI/CD pipelines,
• Enhance performance, reliability, and system resilience in production environments,
• Collaborate closely with business experts, traders, and quants to deliver complex features,
• Apply and promote high-quality engineering practices, including automated testing,
• Proactively identify, troubleshoot, and resolve issues, ensuring long-term stability.

We are looking for you, if you have:

• MSc in Computer Science or equivalent practical experience,
• 5+ years of experience building and maintaining production-grade software,
• Strong foundations in algorithms, data structures, design patterns, and concurrency,
• Knowledge of equity derivatives or trading concepts,
• Experience in financial markets or fintech environments,
• Proven ability to build modular, testable, and maintainable systems,
• Hands-on expertise in Java, Spring Boot, Git, and SQL,
• Strong analytical thinking and a problem-solving mindset,
• Good command of English (written and spoken),
• readiness to travel to Belgium.

Youll get extra points for:

• Familiarity with market data providers and APIs (e.g., LSEG / RFA, Bloomberg B-Pipe).

The role naming convention in the global ING job architecture will be “Engineer III or Engineer IV.