Senior Software Developer
Confirmed on the employer's own hiring board on Oct 13, 2026. First seen by Alion on Oct 12, 2026.
Senior Software Developer
Location: RNAS Yeovilton, Somerset
Salary: £50,000 - £65,000
Working Pattern: Full-time, On-site (Monday to Thursday 08:30-17:00, Friday 08:30-15:00)
Looking for a role where your software expertise directly supports NATO Electronic Warfare training capabilities?
At MASS, we help our customers make better decisions in critical situations. We are looking for a Senior Software Developer to join our team, providing in-hangar support to the NATO Joint Electronic Warfare Core Staff (NATO JEWCS) fleet of Electronic Warfare training assets.
Working within a highly specialised environment, you will play a key role in the development, maintenance and enhancement of Electronic Warfare software and hardware systems, ensuring the continued availability and effectiveness of mission-critical training capabilities.
This is a hands-on role that offers the opportunity to work across software development, systems integration, RF technologies and Electronic Warfare applications, supporting both project delivery and operational activities.
What you'll be doing
- Acting as a software subject matter expert, providing development, maintenance and training support to ensure the continued availability, utility and relevance of EW training assets.
- Undertaking integrated software and hardware modifications to enhance Electronic Warfare training capabilities.
- Developing and maintaining control software and Graphical User Interfaces (GUI) / Man Machine Interfaces (MMI).
- Performing configuration management activities for customer-owned source code and bespoke EW application software.
- Supporting trials, evaluation activities and exercises, including occasional deployment to exercise locations or NATO platforms.
- Troubleshooting, investigating and resolving software and hardware issues within complex Electronic Warfare systems.
- Collaborating with engineers, technicians and customers to deliver innovative technical solutions.
General Profile
- Requires in-depth knowledge of principles and practices in at least one of the working areas of software development and basic knowledge of other areas.
- Works with a high degree of autonomy, applying professional judgement and technical expertise to solve complex problems.
- Responds flexibly to emerging challenges and is able to deliver effective solutions with minimal supervision.
- Contributes to the continuous improvement of Electronic Warfare training capabilities and associated systems.
Job Functional Knowledge
- Requires in-depth practical knowledge in at least one of the working areas of software development and basic practical knowledge of other areas.
- Applies software engineering and software development principles to develop, integrate and maintain systems and applications.
- Able to identify faults, investigate root causes and implement effective corrective actions.
- Understands software lifecycle practices, configuration management and system integration activities.
Essential Skills & Experience
- Degree, HND, HNC or equivalent experience in Software Engineering, Computer Science, Electronic Engineering or a related discipline.
- Experience developing, integrating and maintaining software systems.
- C++ and/or C#.
- Experience developing and maintaining software applications within a technical or engineering environment.
- Strong problem-solving, communication and interpersonal skills.
- Ability to obtain and maintain NATO Secret (NS) Security Clearance.
Desirable Skills & Experience
- LabVIEW developer
- Experience working with API interfaces.
- Knowledge and/or experience working on one or more of: radar/microwave, avionics, communications, electronic warfare. Competency working with RF sub-systems and associated test equipment.
- Evaluation and testing of RF systems or components.
- Digital and analogue communication signals and associated protocols.
- Experience with single-board computers such as Arduino or Raspberry Pi.
- Experience working within Defence, NATO or other secure environments.
What we're looking for
We're looking for a proactive and motivated individual who enjoys solving technical challenges and working as part of a collaborative team. You'll be comfortable operating independently, communicating with a range of stakeholders and applying your expertise to deliver practical solutions in a specialist Electronic Warfare environment.
Who is MASS
MASS is an independent, global technology company, trusted by highly secure organisations to provide advanced, digital services that manage data and keep information safe. With our heritage in defence, we offer robust solutions to sectors where security expertise is essential.
Wellbeing is at the core to our culture, allowing employees to flourish and to achieve their full potential. Our people are important to us, and we take pride in our wellbeing programmes and policies that support individuals including, mental health first aiders and readily available support through our extensive employee assistance programme.
We work in partnership with customers, using skilled, technical experts. We think innovatively to provide tailored, agile and resilient solutions that secure advantage, so you’re ready for digital transformation. MASS is an equal opportunities employer; we know that our people are smart, skilled and motivated and in return we provide a friendly workplace where everyone is valued and has the chance to make an impact.
Apply today to see how working for MASS could work for you!