Full Stack Developer jobs in United Kingdom

SII Group delivers Digital Services, IT, Engineering, and Consulting to diverse industries, enabling digital transformation through our commitment to Growth, People, and CSR.

With over 16,000 professionals across 21 countries, we’re recognised as a “Great Place to Work” for fostering a high-trust culture. Our core values of Trust, Transparency, and Quality drive our work package delivery, ensuring we meet and exceed client expectations as a committed partner.

Since 2016, SII UK has supported top Aerospace & Defence, Aviation, Transportation, and Finance clients, empowering digital transformation with industry‑leading engineering expertise.

Let’s Tech Together is our promise to encourage innovation and teamwork. We support our engineers with development opportunities and a collaborative, inclusive environment where every voice is valued and empowered.

We are seeking a skilled Software Engineer to develop and maintain test solutions, with a focus on C/C++, C#, and scripting languages. The role involves working with test automation frameworks and tools such as LabWindows CVI or TestStand, applying DevOps and continuous integration practices, and supporting high-quality software development through craftsmanship principles like unit testing, TDD, and agile collaboration.

• Experience with communications protocols (e.g. TFTP, Ethernet, RS232/422/485, Modbus, CAN, MIL-STD-1553) and embedded/electronics knowledge is desirable.
• The position also requires hands‑on debugging and measurement using oscilloscopes, spectrum analysers, and related equipment.
• Strong teamwork, problem‑solving, and communication skills are essential.

• Proficiency in C/C++ and C# programming
• Familiarity with scripting and automation
• Understanding of test automation tools and DevOps practices
• Knowledge of electronic measurement/debugging techniques

• Competitive Basic Salary
• 6% Employers Contribution + 6% as a salary sacrifice
• Private Medical Insurance, Life Cover and Income Protection
• 25 days holiday
• 10 days full sick pay per year
• Cycle to Work & TechScheme
• Corporate access to the Udemy platform

* If you're applying for a role requiring security clearance, please be aware that foreign or dual nationality is not an automatic bar, however certain posts may have restrictions which could affect those who do not have sole British nationality or who have personal connections with certain countries outside the UK.