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- Tasks: Design and optimise ultra-low-latency trading systems using cutting-edge C++ technologies.
- Company: Join a top-tier proprietary trading firm revolutionising their trading platform.
- Benefits: Competitive salary, dynamic work environment, and opportunities for rapid career growth.
- Why this job: Be at the forefront of technology, where every nanosecond counts in trading.
- Qualifications: Experience in ultra-low-latency systems and deep knowledge of CPU architecture required.
- Other info: Flat structure with no bureaucracy, fostering collaboration between engineering and trading teams.
We are partnering with one of the world’s most technically ambitious proprietary trading firms — a group rebuilding their entire trading platform from the metal up to operate at the physical limits of modern hardware. This isn’t an incremental improvement. It’s a total re-architecture of the fastest system on the planet, where every microsecond is contested ground and every cache miss is a bug.
Location: London / New York / Chicago
Environment: C++20/23 • Linux • Kernel-bypass Networking • FPGA • RDMA • Nanosecond Execution
Their engineers operate where nanoseconds decide P&L — measured, profiled, and deployed in live markets where performance is the edge. They’re now seeking an elite C++ Engineer capable of designing and optimising the core of a real-time execution platform — a system that ingests millions of market events per second and reacts deterministically, faster than anyone else on Earth.
The successful engineer will:
- Architect zero-GC, lock-free pipelines built around ring buffers and cache-aligned data structures.
- Develop custom kernel-bypass network stacks using DPDK, RDMA, and Solarflare Onload, tuned to single-digit microsecond latency.
- Engineer branch-prediction-aware order handlers and SIMD-vectorized pricing logic in AVX-512.
- Deliver next-tick telemetry with nanosecond-precision timestamps and cross-core synchronization.
- Collaborate with FPGA specialists to merge hardware precision with software agility.
The Toolkit:
- Modern C++20/23, template metaprogramming, constexpr, inline assembly when necessary.
- Profiling and optimization using perf, VTune, bcc, and FlameGraphs.
- Deep knowledge of NUMA-aware design, memory fences, and lock-free concurrency.
- Expertise in custom allocator design, branchless algorithms, and profile-guided optimization.
- A habit of benchmarking rather than assuming — data, not theory.
Ideal Background:
- Proven experience building ultra-low-latency systems in trading, gaming, or networking.
- Deep understanding of CPU architecture, from cache hierarchies to speculative execution.
- The mindset of someone who thinks in nanoseconds and measures in CPU cycles.
- A record of winning battles with compilers, kernels, and performance bottlenecks.
The Environment:
This firm operates on a flat structure — no committees, no bureaucracy, no excuses. Engineering, hardware, and trading sit shoulder-to-shoulder. Code that’s 10ns faster doesn’t just run better — it changes the business. If you believe latency is the final frontier, and profiling is the only truth, this is the environment you’ve been building toward.
To apply, please either send me@mondrian-alpha.com an email, or respond to this advertisement.
Contact Detail:
Mondrian Alpha Recruiting Team
We think you need these skills to ace C++ Engineer — Pushing the Speed of Light | Ultra-Low Latency Trading Systems
How to prepare for a job interview at Mondrian Alpha
✨Know Your C++ Inside Out
Make sure you’re well-versed in C++20/23 features, especially around template metaprogramming and constexpr. Brush up on your knowledge of lock-free concurrency and custom allocator design, as these will likely come up during technical discussions.
✨Understand the Trading Environment
Familiarise yourself with ultra-low-latency systems and how they operate in trading environments. Be prepared to discuss your experience with real-time execution platforms and how you’ve tackled performance bottlenecks in the past.
✨Showcase Your Profiling Skills
Be ready to talk about your experience with profiling tools like perf, VTune, and FlameGraphs. Bring examples of how you’ve used data to optimise systems rather than relying on assumptions — this is crucial in a performance-driven role.
✨Demonstrate Collaboration with Hardware Specialists
Since this role involves working closely with FPGA specialists, highlight any past experiences where you’ve collaborated across disciplines. Discuss how you’ve merged hardware precision with software agility to achieve optimal results.
