Lead Python Developer - Outside £550p/d - DV Cleared
£550 per dayRole: Lead Python Developer
Rate: £550/day - Outside IR35
Location: Cheltenham
Duration: Initial 6-12 months
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. You'll guide 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're interested in the role, feel free to contact me, James Chapman on View phone number on ioassociates.co.uk. I'd be more than happy to have a confidential chat and share more details.
£80k - £90k per annum
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