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C ​/C++ Software Engineer

Job in Southampton, Hampshire County, SO15, England, UK
Listing for: Spectrum IT
Full Time position
Listed on 2026-10-08
Job specializations:
  • Software Development
    C++ Developer, Software Engineer, Embedded Software Engineer, Embedded Systems/ Firmware/ IoT
Salary/Wage Range or Industry Benchmark: 60000 - 90000 GBP Yearly GBP 60000.00 90000.00 YEAR
Job Description & How to Apply Below
Position: C / C++ Software Engineer

Spectrum IT Recruitment is working with an innovative technology business at the forefront of 5G and wireless communications
. They're looking for a Software Engineer to join their software team in Southampton.

This role would suit someone whose main focus is 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  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  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
What We're Looking For 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 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.

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