Principal Java Consultant

Type of contract: B2B contract 
Salary range: 155-205 PLN/H

What will you do?

You will work on building a modern, in-house FX trading platform supporting pricing, booking, routing, risk management and valuations. You will be part of a DevOps-oriented team delivering microservices in close collaboration with business stakeholders, contributing directly to a high-performance, low-latency trading environment.

Your tasks

• Develop high-quality Java code for distributed systems


• Automate testing and deployment for frequent releases


• Collaborate with product owners and business on requirements


• Design and build microservices architecture


• Monitor production systems and ensure stability


• Take ownership of services across the full lifecycle


• Implement low-latency and concurrent solutions

Requirements

• Hands-on experience with Java 17+


• Knowledge of concurrency and low-latency programming


• Experience with data structures and functional programming


• Experience with REST APIs and messaging technologies


• Knowledge of TDD and unit testing frameworks


• Understanding of CI/CD and DevOps practices


• Strong communication skills


• Ability to work in agile teams


• Problem-solving mindset and adaptability


• Experience with AI coding assistants


• Openness to work hybrid from our client's office (Kraków) 8 days a month

Nice to have

• Knowledge of Foreign Exchange domain


• Interest in trading systems


• Experience with open source contributions


• Passion for software development outside of work