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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,
Commitment, Accountability, Passion, Creativity, and Transparency 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.
#Let'sTechTogether
THE OPPORTUNITY
We're looking for an experienced and thoughtful software engineer to help design and deliver reliable, high-integrity systems at scale. You'll be working within a multidisciplinary team on distributed systems that operate in safety-critical environments. This is a role that combines strong technical ability with attention to detail and a proactive mindset. If you take pride in building dependable software, enjoy contributing to robust engineering practices, and value working alongside others who care about quality and safety, this could be the perfect fit for you. We welcome applicants who enjoy mentoring, collaborative problem solving, and continuous improvement.
Experience And Skills
Software Engineer – Safety-Critical & Distributed Systems
What You’ll Bring To The Team
- Ability to obtain SC Clearance with no caveats, or already in possession of this
- Availability for 5 days on-site preferred, with flexibility for 3 days on-site once established in the role
- Proven experience designing large distributed systems
- At least 5 years' experience in professional software engineering
- Solid programming expertise in C/C++
- Additional experience working with Java in complex environments
- Understanding of safety-critical or safety-related software systems, Experience with standards such as IEC 61508 (preferred), or IEC 62304 / IEC 26262
- Strong knowledge of high-integrity coding practices including unit testing and static analysis
- Experience with structured software development lifecycles for regulated systems
- Confidence in writing and maintaining clear technical documentation
- Familiarity with Software Failure Mode and Effects Analysis (FMEA)
- Background in defence or secure systems is a huge bonus
- Hands-on experience using Requirements Management tools such as DOORS or Polarion
Desirable Experience
- Understanding of UML and software modelling methods
- Knowledge of embedded systems
- Further experience in the defence industry
- Familiarity with Atlassian tools such as Jira, Confluence, and Bitbucket
- Experience working in virtualisation and containerised environments
- Understanding of IP networking protocols
- Exposure to CI/CD pipelines and tools like Jenkins or JFROG Artifactory
Why join us? We believe great engineering happens in supportive, well-balanced teams. You’ll work alongside people who are passionate about quality and safety, and who value each other’s contributions. Whether you’re mentoring others, deepening your own expertise, or shaping the architecture of secure systems, your work will have a meaningful impact. We foster an environment where diverse perspectives are encouraged and respected, because we know that innovation thrives when everyone has a voice. Think you meet some but not all the criteria? Please feel free to still apply and we can take your CV in to consideration.
Benefits
- Competitive Basic Salary
- 6% Employers Contribution + 6% as a salary sacrifice
- Private Medical Insurance, Life Cover and Income Protection
- 25 days holiday
- 5 days full sick pay per year
- Flexible working
- Cycle to Work & TechScheme
- Continuous professional development
- 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.
http://www.groupe-sii.com/en
