Lead Python / Typescript Engineer - National Security AI

Lead Python / Typescript Engineer - National Security AI in South East | IO Associates Search Search These jobs were popular with other job seekers Senior/Principal Software Engineer BAE Systems South East Competitive 1 day ago Senior Backend Engineer Fruition Group City of London (EC1), EC1 £85000 - £100000 per annum 1 week ago Senior Software Engineer, Kubernetes , London Apple London Competitive 4 days ago Senior Python Engineer Ikhoi Recruitment East London (E14) £87,000 per annum Pension, bonus, health care, training, 25 days holid 1 week ago AI Engineer 83zero Limited City of London, London £55000 - £70000 per annum 1 day ago Lead Integration Engineer The Curve Group City of London (EC4R), EC4R 3AB Negotiable 1 day ago Staff Software Engineer Kotlin Java JVM Client Server Shoreditch, East London (E1), EC2A £100000 - £120000 per annum + equity + benefits 2 days ago Principal Software Engineer Vitality Corporate Services Limited - Tech Charing Cross, Central London (WC2), WC2R £Competitive + Bonus + Benefits 12 hours ago NEW Integration Developer Oscar Associates (UK) Limited London £525 - £550 per annum 9 hours ago NEW App Developer Outside IR35 Sanderson Government and Defence South East London (SE1), SE1 £550 - £650 per day 2 weeks ago Senior/Principal Software Engineer BAE Systems South East Competitive 1 day ago Senior Backend Engineer Fruition Group City of London (EC1), EC1 £85000 - £100000 per annum 1 week ago Senior Software Engineer, Kubernetes , London Apple London Competitive 4 days ago Senior Python Engineer Ikhoi Recruitment East London (E14) £87,000 per annum Pension, bonus, health care, training, 25 days holid 1 week ago AI Engineer 83zero Limited City of London, London £55000 - £70000 per annum 1 day ago Lead Integration Engineer The Curve Group City of London (EC4R), EC4R 3AB Negotiable 1 day ago Staff Software Engineer Kotlin Java JVM Client Server Shoreditch, East London (E1), EC2A £100000 - £120000 per annum + equity + benefits 2 days ago Principal Software Engineer Vitality Corporate Services Limited - Tech Charing Cross, Central London (WC2), WC2R £Competitive + Bonus + Benefits 12 hours ago NEW Integration Developer Oscar Associates (UK) Limited London £525 - £550 per annum 9 hours ago NEW App Developer Outside IR35 Sanderson Government and Defence South East London (SE1), SE1 £550 - £650 per day 2 weeks ago Lead Python / Typescript Engineer - National Security AI IO Associates South East; Milton Keynes; Southampton; Dartford; Reading; Maidstone; Sutton; Croydon; Slough; Portsmouth; Brighton Permanent Published: 5 days ago £80000 - £100000 per annum + Hybrid Lead Python / Typescript Engineer - National Security AI IO Associates Principal Engineer / Hands-on Technical Lead Permanent | £80,000 - £100,000 | South East (Hybrid) SC clearance required or eligible We are seeking a Principal Engineer to take ownership of technical delivery for Defence programmes. The role focuses on building AI-enabled capabilities in secure, air-gapped environments, combining hands-on software engineering with technical leadership to deliver high-assurance solutions. You'll be working on some of the most exciting projects within Defence AI and LLM generation and deployment, delivering and integrating core products and working with the customers to build best in class systems for mission decisions. Key Responsibilities Lead day-to-day technical delivery on Defence programmes Make architecture and design decisions for deployments into classified environments Write production code, conduct code reviews, and set engineering standards Translate programme requirements into technical plans, sprints, and deliverables Work closely with Defence stakeholders, delivery managers, and end users on site Manage technical risk, dependencies, and integration points across programme workstreams Mentor and develop engineers within the team Contribute to technical proposals, bids, and architecture documentation Support release management and deployment in air-gapped environments Skills & Experience Significant experience as a senior or lead engineer delivering complex software in secure or regulated environments Strong ability to articulate architecture and integration concerns clearly Proficiency in Python and/or TypeScript (core stack) Familiarity with AI/ML integration patterns (model serving, RAG pipelines, vector databases) Understanding of secure development practices Experience working in fast-paced, scaling organisations UK-based with willingness to travel to sites as required Hold or eligible for DV clearance This is a high-impact role delivering nationally significant defence programmes with flexible hybrid working in the South East. 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