Senior C++ Developer

We are seeking a Senior C++ Developer to join our global team working on client connectivity trading systems and FIX-based platforms. You will contribute to a multi-year initiative to modernize existing connectivity platforms, collaborating with analysts, developers, and business stakeholders across the globe. This role involves solving challenging architectural problems, enhancing system performance, delivering client-driven functionality, and ensuring compliance with market regulations, while helping the team embrace a DevOps ethos with continuous integration and continuous delivery.

This role offers a hybrid model, with 3 days per week working from the client's office in Kraków or Wrocław, Poland.

Responsibilities

Spend 80-90% of your time performing direct development-related activities such as coding, design, configuration management, releases, and post-implementation support Contribute to architectural decisions as part of a global team solving complex technical problems Modernize existing client connectivity trading platforms, including A4, A4FIX, FIXAJ, and Blue.

Direct Deliver technical projects to enhance system performance and throughput Work on client-driven projects to add new functionality and ensure compliance with market regulations Drive the team's transformation toward a DevOps ecosystem with CI/CD practices Collaborate closely with analysts, developers, and business stakeholders across multiple regions Provide post-implementation support and ensure system reliability Requirements 5+ years of hands-on experience with C++, including multi-threading, STL, and templates Proficiency in data structures, casting, pointers, socket programming, and algorithms Development experience in a financial environment working on order management systems, FIX protocol, and order-state handling Background in programming within Linux/Unix environments Expertise in building high-performance, high-availability, low-latency, transaction-oriented distributed systems with high throughput and capacity Knowledge of the equity trading environment, ideally across a multi-regional capacity Excellent communication skills and the capability to explain highly complex functional and non-functional topics to IT and business stakeholders English proficiency at an Upper-Intermediate level (B2) or higher Nice to have Prior experience working on a client connectivity system Familiarity with Java, including Core Java, Collections, and Reflection Capability to handle Level 3 (DEV) support in a pressurized production environment