Role: Lead Python Developer
Location: Cheltenham or London
Salary: £80,000 - £90,000
Clearance Required: DV

We're looking for an experienced Lead Python Developer to join a high-impact programme within the UK Defence and National Security sector. This is a unique opportunity to play a key role in delivering secure, mission-critical software systems that directly support national safety and strategic defence operations.

As a technical leader, you'll drive the design and development of advanced Python-based systems-often in highly secure environments guiding cross-functional teams, ensure engineering excellence, and oversee the full software lifecycle, from concept and prototyping to secure deployment and ongoing support.

Key Responsibilities:

Leading the design and development of Python-based software systems in a high-security setting
Working closely with data scientists, analysts, and engineering teams to deliver scalable, reliable solutions
Architecting secure applications and services in line with defence-grade standards
Mentoring developers and enforcing best practices across code, testing, and deployment
Integrating machine learning models and real-time data pipelines where applicable
Collaborating with stakeholders to gather requirements and showcase technical progress

Essential Skills & Experience:

Proven expertise in Python development in production environments
Experience in secure or regulated industries (Defence, Government, Aerospace, etc.)
Solid grasp of CI/CD, containerisation (Docker/Kubernetes), and cloud or on-premise deployments
Ability to lead technical discussions, reviews, and deliverables across cross-functional teams
Familiarity with Agile/Scrum delivery
Active DV Clearance

If you are interested in the above position, please contact me, James Chapman on 07903 438136 or drop me an email at