Senior Java Backend Engineer – Financial Markets

ING Hubs Romania; Warszawa; On-site; PLN 107,000 - 246,000; Full time

Job summary

ING Hubs Poland is seeking an experienced backend engineer to design and develop robust services for real-time trading platforms. You will collaborate with traders, quants, and business experts to deliver scalable features across global hubs in a fast-paced FinTech environment.

The role emphasizes production-grade software, modern REST APIs, and strong emphasis on testing and resilience. A willingness to travel to Belgium is required.

Qualifications

• MSc in Computer Science or equivalent practical experience.
• 5+ years of production-grade software experience.
• Strong foundations in algorithms, data structures, design patterns, and concurrency.
• Knowledge of equity derivatives or trading concepts is a plus.
• 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.
• Good command of English (written and spoken).
• Readiness to travel to Belgium.

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.

Skills

5+ years experience

Analytical thinking

Problem solving

English proficiency

Education

MSc in Computer Science

Tools

Java

Spring Boot

Git

SQL

Job description

ING Hubs Poland is seeking an experienced backend engineer to design and develop robust services for real-time trading platforms. You will collaborate with traders, quants, and business experts to deliver scalable features across global hubs in a fast-paced FinTech environment.

The role emphasizes production-grade software, modern REST APIs, and strong emphasis on testing and resilience. A willingness to travel to Belgium is required.