Senior Java Backend Engineer — Fintech & Global Markets

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

Job summary

ING Hubs Poland in Warsaw is seeking a seasoned Backend Engineer to help design and develop robust backend services for Financial Markets. You will work on platforms used by sales teams, traders, and risk managers across global hubs, contributing to the end-to-end trading lifecycle.

Candidates have MSc in Computer Science, 5+ years of production-grade software experience, strong Java and Spring Boot skills, and readiness to travel to Belgium.

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.
• Ability to build modular, testable, maintainable systems.
• Hands-on expertise in Java, Spring Boot, Git, and SQL.
• English proficiency; willingness to travel to Belgium.

Responsibilities

• Design and develop robust backend services with REST APIs.
• Improve architecture, scalability, and CI/CD pipelines.
• Enhance performance and reliability in production.
• Collaborate with traders, quants, and business experts.
• Promote high-quality engineering practices including automated testing.
• Identify and resolve issues to ensure long-term stability.

Skills

Java

Spring Boot

Git

SQL

English

Algorithms & data structures

Concurrency

Travel to Belgium

Education

MSc in Computer Science

Tools

Spring Boot

Job description

ING Hubs Poland in Warsaw is seeking a seasoned Backend Engineer to help design and develop robust backend services for Financial Markets. You will work on platforms used by sales teams, traders, and risk managers across global hubs, contributing to the end-to-end trading lifecycle.

Candidates have MSc in Computer Science, 5+ years of production-grade software experience, strong Java and Spring Boot skills, and readiness to travel to Belgium.