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

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

Job summary

Join a leading defence sector programme as a Lead Python Developer, where you'll architect secure applications and lead development teams in high-security environments. This unique opportunity allows you to work on mission-critical software that directly supports national safety. If you have a strong Python background and DV clearance, we want to hear from you.

Qualifications

• Experience in secure industries such as Defence or Government.
• Solid grasp of CI/CD and cloud deployments.
• Active DV Clearance required.

Responsibilities

• Leading design and development of Python-based software systems.
• Integrating machine learning models and real-time data pipelines.
• Mentoring developers and enforcing best practices.

Skills

Python development

Mentoring

Agile/Scrum

CI/CD

Containerisation

Job description

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

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Client:

iO Associates - UK/EU

Location:

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.