Ocean Red
Senior C++ Engineer - Low-Latency
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Senior C++ Engineer - Low-Latency Systems
OVERVIEW
- Business: European trading technology firm
- Engineering: Modern C++, Linux, networking, real-time systems
- Location: London
- Hybrid: 2 days a week in the office
- Salary: ÂŁ60,000âÂŁ95,000 mid-level / ÂŁ90,000âÂŁ115,000 senior
- Bonus: Discretionary
- Level: Mid-level and senior engineers considered
About the Role
Build the systems other trading firms depend on.
Some C++ teams build applications.
This team builds the infrastructure underneath them.
Youâll work on high-throughput, latency-sensitive systems used to process electronic trading activity, where performance problems canât simply be hidden behind more hardware.
The engineering sits close to the network, the data, and the critical path.
That means thinking about things like:
- How data moves through the system
- What happens when message volumes increase
- Where contention appears
- How memory is being used
- Why one implementation is faster than another
- How to keep a critical system predictable and reliable
This is the kind of environment where understanding what the machine is actually doing matters.
WHAT YOU'LL WORK ON
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Youâll join a specialist C++ team responsible for core trading and exchange technology.
Your work will include developing, testing, and improving systems that need to process large volumes of events in real time.
You could be working on:
- C++ services on Linux
- Network communication using TCP, UDP, and multicast
- High-throughput messaging and event processing
- Multithreaded and concurrent systems
- Profiling and removing performance bottlenecks
- Improving resilience in long-running production systems
- Integrating financial-market protocols and connectivity
The platform is mature and specialised.
You wonât be expected to arrive on Monday and start changing its most critical components on Tuesday.
Youâll first learn how the architecture works, understand why certain decisions were made, and gradually take ownership of more complex areas of the system.
WHAT THEY'RE LOOKING FOR
The strongest candidates tend to have one thing in common: C++ is their main engineering language, not something they occasionally use.
Youâll need solid experience with:
- C++11 or later
- Linux development
- Multithreading / concurrency
- Networking fundamentals
- Performance-sensitive or real-time systems
Get help with your application
Your very own career expert that helps elevate your application to the next level.
Experience with Boost, Python, SQL, and Git will also be useful.
If youâve worked with FIX, SBE, market data, exchange connectivity, or electronic trading systems, even better.
But financial markets experience isnât essential.
Engineers coming from areas such as networking, telecoms, embedded systems, real-time infrastructure, high-performance computing, or other mission-critical environments can also fit well.
WHO THIS TENDS TO SUIT
Youâll probably enjoy this team if you like understanding systems properly rather than treating them as black boxes.
Youâre comfortable reading an established codebase before changing it.
You like finding out why something is slow rather than simply rewriting it.
And youâre happy working with engineers who will challenge your technical decisions and expect you to challenge theirs.
If youâre a C++ engineer working on performance-critical, real-time, or network-heavy systems, apply, and Iâll talk you through the engineering team, technology, and interview process.
You must be eligible to work in the UK, no sponsorship is available for this particular opportunity
âIt took my CV and asked me questions relevant to understanding what kind of jobs to suggest for me. Suggestions were almost perfect. Jobs were exactly what Iâve been looking for.â
Jessica, London
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