Senior C++ Developer – High-Performance Messaging Systems
Salary: £180,000 – £200,000
Location: London (Hybrid)
Company: Covenant Partners Realty
Ncounter is supporting the growth of a high-performing engineering team responsible for building and evolving one of the most sophisticated messaging platforms in the capital markets space. This is a senior-level C++ role focused on performance, reliability, and scale, sitting at the heart of a globally distributed trading environment.
Youll take ownership of a large, in-house C++ codebase that underpins hundreds of applications and mission-critical data flows. The work is deeply technical, solving problems around low latency, throughput, concurrency, and resilience, while operating in a predominantly Linux environment with Python used for tooling, libraries, and integration.
What Youll Be Working On
* Designing and enhancing high-performance C++ messaging libraries used across global trading systems
* Optimising multithreaded, low-latency components in Linux environments
* Supporting and evolving APIs used by teams working in C++, Python, and other languages
* Working closely with infrastructure and platform teams to ensure reliability at scale
* Troubleshooting, testing, and performance tuning across complex distributed systems
What Were Looking For
* Strong commercial experience in modern C++ within performance-critical systems
* Deep understanding of Linux, including deployment, debugging, and runtime behaviour
* Practical Python experience for scripting, tooling, or API interaction
* Experience building or supporting high-throughput, low-latency platforms
* Solid grounding in concurrency, memory management, and systems-level problem solving
This is a genuinely technical role with real ownership, long-term scope, and exposure to complex engineering challenges that few environments can offer.
If youre a senior C++ engineer who enjoys working close to the metal, values clean systems design, and wants to build technology that truly matters, get in touch with Ncounter for a confidential conversation.
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