Software Engineer (National Security)

Location: Opportunities across all compass points, with particular demand across South West, North West and London National Security hubs
Hybrid: Secure-site working required (typically 3–4 days per week depending on programme)
Salary: £70,000 – £120,000 plus bonus and benefits, depending on experience and SFIA grading
Clearance: Active DV / eDV clearance preferred

The Opportunity

You will be joining a specialist engineering consultancy at a particularly exciting stage of growth as it continues expanding its National Security capability.

Already well established across Defence and Government, the business has built a reputation around data, geospatial capability, secure software engineering and cloud transformation. With significant investment behind the business and a growing portfolio of National Security programmes, the engineering teams continue to scale across multiple disciplines.

What makes the environment stand out is the combination of technical depth and culture. The organisation has been recognised as a Best Workplace, maintains strong Glassdoor reviews and has built a reputation for transparency, support and genuine investment in its people.

Many engineers join from larger organisations looking for more ownership, broader technical exposure and the opportunity to work more closely with both customers and engineering leadership. Teams remain deliberately lean, allowing engineers to influence technical decisions and contribute beyond their immediate area of responsibility.

As the National Security capability grows, there is a genuine opportunity to help shape how secure software systems are delivered across the organisation's future programmes.

The Role

As a Software Engineer, you will help design, develop and maintain secure applications, APIs and backend services supporting complex operational systems within National Security environments.

You'll work closely with architects, platform engineers, data specialists and customer stakeholders to deliver secure, scalable and production-grade software across a range of programmes.

Typical responsibilities include:

• Designing and developing secure applications, APIs and integrations using technologies such as Java, Spring Boot, Python, JavaScript or TypeScript
• Building scalable backend services and distributed systems supporting operational and analytics workloads
• Developing cloud-native applications integrated with AWS services and modern platform environments
• Contributing to software architecture, technical design and engineering best practice discussions
• Supporting DevSecOps delivery through CI/CD pipelines, containerised deployments and cloud-native tooling
• Integrating applications with data platforms, streaming services and AI-enabled systems
• Implementing monitoring, logging and observability to support reliable live services
• Working directly with customers and multidisciplinary teams to solve complex technical challenges

The environment combines secure software engineering, cloud-native development, operational data and modern platform engineering, providing broad exposure across multiple technical domains.

The organisation values engineers who are curious, collaborative and comfortable working directly with stakeholders. Strong communication skills and a pragmatic delivery mindset are often more important than matching every technology perfectly.

Security Requirements

Due to the nature of the work, active DV / eDV clearance is preferred. Candidates should typically be sole UK nationals and comfortable operating within secure National Security environments.

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