Senior C++ Software Engineer (Fully Remote, Poland) FinTech

Selby Jennings; Warszawa; Remote; PLN 300,000 - 520,000; Full time

Job summary

Selby Jennings in Poland is seeking a C++ Software Engineer to join a highly technical trading technology team. You will build and optimise low-latency C++ systems and contribute to real-time data pipelines and APIs used in global financial markets.

The role focuses on performance-critical components of trading infrastructure, with exposure to distributed systems and streaming platforms. Candidates typically bring 5+ years in C++ and a track record of delivering reliable, scalable software in

Qualifications

• 5+ years of professional experience in C++
• Experience with APIs, distributed systems, or real-time data processing
• Background in performance optimisation / low-latency systems
• Exposure to financial systems or trading environments is a plus, or experience with streaming / API-driven platforms

Responsibilities

• Develop and optimise low-latency C++ systems
• Build and enhance real-time data pipelines and APIs
• Work on performance-critical components of trading infrastructure

Skills

C++

Low-latency

APIs

Distributed systems

Real-time data

Trading

Job description

C++ Software Engineer (Fully Remote, Poland) FinTech - Trading Technology

Candidates must be Poland-based and eligible to work on a B2B contract.

A leading fintech firm is scaling its engineering team and hiring a C++ Software Engineer to build high-performance trading infrastructure used by global banks and hedge funds. This organisation develops low-latency trade routing and execution platforms, powering connectivity to major liquidity venues worldwide. Their systems operate in real-time environments, handling large volumes of market data with a strong focus on performance, reliability, and scalability.

The Role

You'll join a highly technical, international engineering team working on the core platform:

• Develop and optimise low-latency C++ systems
• Build and enhance real-time data pipelines and APIs
• Work on performance-critical components of trading infrastructure

Requirements

• Strong commercial experience in C++ (5+ years of professional experience)
• Experience with APIs, distributed systems, or real-time data processing
• Background in performance optimisation / low-latency systems
• Exposure to financial systems or trading environments is a plus, or experience with streaming / API-driven platforms
  

If you enjoy building high-performance systems in real-time environments, this is a strong opportunity to work on technically challenging problems at scale.