Lead Python Developer - Outside £550p/d - DV Cleared

JR United Kingdom; Belfast; On-site; GBP 80,000 - 100,000; Full time

Job summary

A leading company is seeking a Lead Python Developer to join a critical program in UK Defence and National Security. The role involves leading the design and development of secure software systems, collaborating with various teams, and providing mentorship to developers. This unique opportunity is suited for candidates with experience in regulated environments and active DV Clearance.

Qualifications

• Experience in secure or regulated industries (Defence, Government, Aerospace)
• Active DV Clearance required

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.
• Mentoring developers and enforcing best practices across code, testing, and deployment.

Skills

Mentoring

Python Development

CI/CD

Docker

Kubernetes

Agile/Scrum

Integration of Machine Learning Models

Job description

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Lead Python Developer - Outside £550p/d - DV Cleared, belfast

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Client:

iO Associates - UK/EU

Location:

belfast, United Kingdom

Job Category:

Other

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EU work permit required:

Yes

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Job Views:

2

Posted:

06.06.2025

Expiry Date:

21.07.2025

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Job Description:

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
• 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 07903 438136. I'd be more than happy to have a confidential chat and share more details.