> Markdown version of [/jobs/ext/3694973-software-developer](https://www.wearedevelopers.com/jobs/ext/3694973-software-developer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Software Developer

- **Company:** Mass Limited
- **Location:** Yeovil, UK
- **Experience:** Expert
- **Salary:** £50,000.0 - £65,000.0
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Software Applications, Arduino, C Sharp (Programming Language), C++ (Programming Language), Configuration Management, Graphical User Interface, LabVIEW, Radio-Frequency Identification, Software Maintenance, Raspberry Pi, Software Engineering, Systems Integration, Information Technology
- **Published:** October 12, 2026
- **Apply:** https://massweb.eploy.net/vacancies/894/senior-software-developer.html

## About the Role

+ 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.

## Description

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