IT & Software

Senior Software Engineer

Spectrum IT Recruitment

Hampshire · Hampshire · United Kingdom

Salary: $60,000 – $65,000 per year

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: WJ-756_360470 · Posted 07 Nov 2026, 12:00 AM

Find more on GigBlow

This role is listed on GigBlow for discovery and search. Hiring decisions and applications are handled by the employer or their chosen application system.