C++ Engineer - Pushing the Speed of Light | Ultra-Low Latency Trading Systems

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.

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.