Cheltenham, Gloucestershire

Senior Software Engineer

Posted on Wednesday, 14th January 2026

Defence and Military
Cheltenham, Gloucestershire
£70000 - £80000 per annum
Permanent


Senior Software Engineer

Cheltenham, UK (Hybrid)
up to £80K per annum DOE

Active Security Clearance required

iO Associates are aligned with a technology-led organisation within the defence and security space to find a Security Cleared Senior Software Engineer. They are known for its culture of excellence, collaboration, and strong focus on professional growth and wellbeing.

The ideal candidate will design, develop, and deliver high-quality software solutions, working on complex, mission-critical projects while collaborating closely with cross-functional teams to drive technical excellence and innovation.

Responsibilities

  • Design and implement high-quality software solutions using modern best practices
  • Collaborate with cross-functional teams to analyse requirements and deliver technical solutions
  • Lead, mentor, and support junior engineers and conduct code reviews to maintain quality and standards
  • Troubleshoot and debug applications to improve performance and stability

Key Experience

  • Degree in Computer Science, Software Engineering, or a related field
  • Strong experience in commercial software development
  • Proficiency in Java, C++ or Python, NodeJS, TechLead
  • Knowledge of DevOps practices and CI/CD pipelines; experience in cloud tech (desired)
  • Background in defence or secure environments (desired)

This is an excellent opportunity to work for global leader that is known for reliability, customer focus and high client satisfaction in global content delivery. Apply with your UPDATED CV on the link below or contact us if you want to know more about the role and company.

*P. S: Company cannot provide visa sponsorship, so only candidates residing in UK and with the existing right to work will be considered for the role.

Apply for this role