Software Engineer

SII Group UK; West of England; On-site; GBP 60,000 - 90,000; Full time

Job summary

SII UK invites a Software Engineer for Autonomy to support development, deployment and evolution of software, data and AI capabilities across defence and technology-focused environments. You’ll join a new software team, delivering scalable, secure solutions and contributing to digital transformation initiatives.

Applicants should have strong C++ skills, Linux/Windows experience, Python knowledge and a background in regulated industries. UK Security Clearance (SC) eligibility is welcome.

Qualifications

• Strong C++ development experience and knowledge of safety-critical programming
• Experience on Linux and/or Windows platforms
• Knowledge of Python and modern software practices
• Experience creating and maintaining CI/CD pipelines
• Understanding of DevOps, DevSecOps and Agile methodologies
• Experience with cloud technologies, APIs and microservices
• Knowledge of databases such as MySQL or MongoDB
• Experience with autonomy systems integration or autonomous software architectures
• Strong analytical, troubleshooting and problem-solving skills
• Experience delivering software in regulated defence/aerospace environments
• Ability to communicate with technical and non-technical stakeholders
• Degree or equivalent in engineering/software discipline
• Eligible to obtain UK Security Clearance (SC)

Responsibilities

• Develop, test and deploy secure software solutions.
• Create and maintain CI/CD pipelines to support automated delivery.
• Develop reusable and scalable software capabilities.
• Support software products throughout their lifecycle.
• Conduct code reviews, debugging and troubleshooting.
• Contribute to secure development practices and threat modelling.
• Work with architects and engineers to deliver integrated solutions.
• Implement APIs and third-party integrations.
• Produce high-quality technical documentation.
• Support innovation activities and continuous improvement initiatives.

Skills

C++

Linux/Windows

Python

CI/CD

DevOps/DevSecOps

Cloud

APIs & Microservices

Databases

Autonomy systems

Regulated environments

Communication

Security clearance

Education

Engineering or Computer Science degree

Tools

Linux

Windows

MySQL

MongoDB

Job description

We are seeking a Software Engineer for Autonomy to support the development, deployment and evolution of software, data and AI capabilities across complex and safety-critical programmes. Working within a newly established software development team, you will contribute to the creation of scalable and reusable software solutions that enhance operational capabilities and support strategic growth.

You will work closely with software engineers, architects, DevOps specialists and stakeholders across multidisciplinary teams, developing secure and robust solutions that enable autonomy, data integration and digital transformation initiatives across defence and technology-focused environments.

KEY RESPONSIBILITIES:

• Develop, test and deploy secure software solutions.
• Create and maintain CI/CD pipelines to support automated delivery.
• Develop reusable and scalable software capabilities.
• Support software products throughout their lifecycle.
• Conduct code reviews, debugging and troubleshooting activities.
• Contribute to secure development practices, threat modelling and vulnerability management.
• Work closely with architects, engineers and stakeholders to deliver integrated solutions.
• Implement APIs and third‑party integrations.
• Produce high-quality technical documentation.
• Support innovation activities, proof‑of‑concepts and continuous improvement initiatives.

ESSENTIAL SKILLS & EXPERIENCE:

• Strong C++ development experience or knowledge of equivalent safety-critical programming languages.
• Experience developing software on Linux and/or Windows platforms.
• Knowledge of Python and modern software engineering practices.
• Experience creating and maintaining CI/CD pipelines.
• Understanding of DevOps, DevSecOps and Agile methodologies.
• Experience with cloud technologies, APIs and microservices.
• Knowledge of databases such as MySQL, MongoDB or similar.
• Experience with autonomy systems integration or autonomous software architectures.
• Strong analytical, troubleshooting and problem‑solving skills.
• Experience delivering software within defence, aerospace, medical or other regulated environments.
• Ability to communicate effectively with technical and non‑technical stakeholders.
• Degree, HND or equivalent qualification in a relevant engineering or software discipline.
• Eligible to obtain UK Security Clearance (SC).

DESIRABLE SKILLS:

• Experience with AI, Machine Learning or autonomous systems.
• Knowledge of containerisation and cloud deployment technologies.
• Experience with large-scale data integration programmes.
• Understanding of software architecture governance and design assurance.
• Knowledge of ITIL, Enterprise Architecture or information management frameworks.
• SAFe Agile experience or relevant technical certifications.

Who are we?

With five strategic offices in Belfast, Chester, Farnborough, London and Oxford, we work in partnership with our customers UK-wide to deliver high-impact engineering solutions.

SII UK is a trusted Aerospace and Defence engineering partner, supporting the delivery of complex, mission‑critical programmes while helping to shape the future of innovation across next‑generation systems and technologies.

Our teams contribute daily to creating a fulfilling, stimulating and career development focused work environment.

True to our human‑centred values, we are committed to making SII UK a Great Place To Work, having been certified 5 years running.

Joining SII UK means being part of our collective goals, guided by our mission Let's Tech Together, and helping to build a digital future that is sustainable, at the heart of an environment that values learning & collaboration.