Spectrum IT Recruitment
Senior Software Engineer
Senior Software Engineer at Spectrum IT Recruitment, based in Southampton, South East England, paying £60,000 - £65,000 per annum. This is a permanent role.
- Pay
- £60,000 - £65,000 per annum
- Hours and contract
- Permanent · On site
- Location
- Southampton, South East England
- Closing date
- Sector
- Software Developer
14% below the typical rate for software developer
Reference 57538879
About the role
Spectrum IT Recruitment is working with an innovative technology business at the forefront of 5G and wireless communications. They're looking for a Senior Software Engineer to join their software team in Southampton.
This role would suit an experienced engineer whose main focus is C or C++ software development, particularly in multithreaded or high-performance systems.
The Role
You'll take a leading role in developing, integrating and optimising software that supports the company's 5G NR Physical Layer (PHY) technology. Working with software, hardware, architecture and system-test teams, you'll tackle complex performance challenges and help shape reliable software for a demanding technical environment.
Key Responsibilities
- Take technical ownership of C/C++ software development used to run and test 5G NR PHY algorithms
- Drive software performance improvements through optimisation and multithreading
- Lead the integration of software components and resolution of 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
- Provide senior technical input into reviews and wider software engineering decisions
What We're Looking For
Essential:
- Extensive commercial experience developing software in C or C++
- Strong software engineering fundamentals and sound technical judgement
- Proven experience with multithreaded or high-performance software
- The ability to take ownership of 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
Spectrum IT Recruitment (South) Limited is acting as an Employment Agency in relation to this vacancy.
Reference: 57538879 · Posted 7 hours ago · Closes 20 Nov 2026 · Listed via Spectrum IT Recruitment
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