> Markdown version of [/jobs/ext/4631039-c-c-software-engineer](https://www.wearedevelopers.com/jobs/ext/4631039-c-c-software-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# C / C++ Software Engineer

- **Company:** Spectrum IT Recruitment
- **Location:** London, UK
- **Contract:** Permanent contract
- **Skills:** Automation of Tests, C++ (Programming Language), Interoperability, Signal Processing, Software Engineering, O-RAN, Multithreading, 5G NR, Hardware Acceleration, Software Performance
- **Published:** November 8, 2026
- **Apply:** https://www.apply4u.co.uk/jobs/c-c-software-engineer/55372587

## About the Role

Essential:
Strong commercial experience developing software in

C or C++
Solid software engineering fundamentals
Experience with

multithreaded or high-performance software
An interest in solving complex performance and optimisation challenges
Desirable:
Knowledge of SIMD or hardware acceleration
An understanding of signal processing
Exposure to 5G, O-RAN or fronthaul protocols such as eCPRI
Why This Opportunity?
You'll join a software team working on challenging

## Description

C or C++ software development , particularly in multithreaded or high-performance systems.
The Role
You'll develop, integrate and optimise software that supports the company's

5G NR Physical Layer (PHY) technology . Working with software, hardware, architecture and system-test teams, you'll tackle performance challenges and help build reliable software for a demanding technical environment.
Key Responsibilities
Develop C/C++ software used to run and test 5G NR PHY algorithms
Improve software performance through optimisation and multithreading
Integrate software components and help resolve complex technical issues
Develop and maintain automated testing and CI processes
Collaborate with hardware, architecture and system-test teams
Support interoperability testing with customers, vendors and operators
Contribute to technical reviews and wider software engineering decisions, 5G technology , with opportunities to solve performance problems and collaborate across several engineering disciplines.
If you're a C/C++ Software Engineer who enjoys building and optimising complex software, we'd love to hear from you.
Spectrum IT Recruitment (South) Limited is acting as an Employment Agency in relation to this vacancy.