Senior C++ Engineer — Trading Systems

Fionics; Amsterdam; On-site; EUR 150,000 - 210,000; Full time

Benefits offered by this job

Relocation support

Job summary

Fionics in Amsterdam is seeking a Senior C++ Engineer to shape ultra-low latency trading systems. You will build and optimize performance-critical infrastructure, working across C++ (17/20), Linux internals, and high-speed networking.

Your work directly affects trading performance as you own designs with fast feedback loops and close collaboration with traders and quants.

Qualifications

• Strong production experience with modern C++ (17+).
• Deep systems programming and networking fundamentals.
• Track record optimizing for low latency and performance.
• Solid Linux and multithreaded programming background.

Responsibilities

• Build and optimize performance-critical trading infrastructure.
• Work across modern C++ (17/20), Linux internals, and networking.
• Own systems end-to-end: design, build, measure, optimize.
• Collaborate directly with the desks your code serves.

Skills

Modern C++ (17+)

Systems programming

Networking fundamentals

Linux multithreaded programming

Tools

Linux

Job description

Senior C++ Engineer — Trading Systems Amsterdam · On-site · Full-time

We're hiring a Senior C++ Engineer for a leading Amsterdam-based HFT firm. A global market maker known for ultra-low latency systems, proprietary technology, and best-in-class infrastructure.

This is a role where nanoseconds matter and your code has a direct, measurable impact on trading performance. You'll work alongside traders, quants, and researchers in a deeply technical environment with real ownership and short feedback loops.

What you'll do

• Build and optimize performance-critical trading infrastructure
• Work across modern C++ (17/20), Linux internals, and networking
• Own systems end-to-end: design, build, measure, optimize
• Collaborate directly with the desks your code serves

What you'll bring

• Strong production experience with modern C++ (17+)
• Deep systems programming and networking fundamentals
• Track record optimizing for low latency and performance
• Solid Linux and multithreaded programming background

Nice to have

• HFT, market-making, or ultra-low-latency production experience
• Python, FPGA, or hardware acceleration exposure
• Competitive programming or CTF background

The package

• Top-of-market base salary plus performance bonus
• Relocation support for the right candidate
• Amsterdam, on-site (no remote)