AI Engineer | Defence AI Start-Up | London

OHO Group (Lithuania); Greater London; On-site; GBP 70,000 - 90,000; Full time

Job summary

London AI Start-Up is seeking an AI Engineer to join a growing team in London. You will build and deploy cutting-edge AI systems, integrate AI models, and contribute to autonomous AI projects with real-world impact.

Ideal candidates have 3+ years of professional AI/ML experience, strong Python skills, and a track record of delivering production-ready software in a defence or security-related context.

Qualifications

• 3+ years of professional AI/ML experience.
• Proficient in Python and building production-quality software.
• Experience building AI-powered applications, AI agents, or ML systems at scale.
• Strong problem-solving in fast-paced engineering environments.

Skills

Python

AI/ML

Production-grade software

AI systems

Autonomy/defence

Job description

AI Engineer | Defence AI Start-Up | London

AI Engineer required to join a rapidly growing London-based defence AI start-up building next-generation autonomous and AI-driven systems supporting critical national security missions.

Founded by experienced operators and technologists, and backed by leading investors, the company is entering an exciting growth phase. This is an opportunity to build and develop cutting-edge AI systems, solve complex technical challenges, and work on technology with genuine real-world impact.

You are:

• An AI Engineer with 3+ years of professional experience and strong software engineering fundamentals
• Highly proficient in Python, with experience building production-quality software
• Experienced building AI-powered applications, LLM integrations, AI agents, Machine Learning, or automation systems
• Comfortable taking AI systems from experimentation and prototyping through to production
• A strong problem solver who thrives in collaborative, fast-paced engineering environments
• Interested in AI, autonomy, defence, or mission-critical technologies
• Experience within defence, aerospace, robotics, autonomy, or security
• Previous experience in an early-stage or venture-backed start-up
• Experience building and deploying production AI / ML systems at scale
• Build AI systems that deliver real-world impact within defence and national security
• Join a well-backed, high-growth AI start-up with experienced founders
• Take significant ownership of technically challenging AI problems
• Work on cutting-edge AI, Machine Learning, agents, and autonomous systems
• Join a small, high-calibre engineering team solving genuinely complex challenges

If you're an AI Engineer who wants to combine strong software engineering with cutting-edge AI to build technology that genuinely matters, I'd love to hear from you.

AI Engineer | Defence AI Start-Up | London