ExTrac AI - Machine Learning Engineer
Requirements
• Due to the nature of our work and the clients we support, applicants must be eligible to obtain UK security clearance. We are currently only able to consider applicants who are nationals of a NATO member state, Australia, or New Zealand. • 2+ years of professional software engineering experience, with experience owning well-defined features or components end-to-end within a larger system • Technical excellence (contributing to production systems, research that was used, or hands-on ownership of well-defined components in an early-stage role) • Some hands-on experience with model serving (small models and LLMs), agent orchestration or retrieval systems • Developing rigour in evaluation and benchmarking, with support from senior engineers • Strong engineering fundamentals: ability to write clean, maintainable code • Comfort with a fast-paced environment and clear ownership of well-defined work • Exposure to modern coding agents and interest in effective workflows • Desirable • Building agentic tools and harnesses • Working on domain-specific modelling problems • Clear writing, systematic thinking and strong communication
Responsibilities
• Designing systems that balance research velocity with product and production constraints • Help shape technical decisions on model selection, training approaches, evaluation and deployment for well-defined components • Build and ship production-ready components, combining research rigour with pragmatic engineering • Take projects from early exploration through to reliable deployment • You should apply if • You like using machine learning to solve challenging problems in a complex domain • You enjoy working closely with product, design and the analysts who use what you build, translating their feedback into technical decisions • You're energised by hands-on work with model serving (small models and LLMs), agent orchestration and retrieval systems • You care about engineering fundamentals: writing code that's clean and maintainable, not just code that works • You are comfortable with a fast-paced environment and clear ownership • Where this role can take you • This role positions you at the frontier of applied AI for high-stakes decision-making, giving you the chance to help shape production agentic systems that influence real geopolitical and organisational outcomes. • Depending on your interests, this role can open paths into specialised domain AI, technical leadership and lasting impact in the decision-intelligence space.
Benefits
• Competitive salary based on skills and experience. • A generous benefits package, including Private Medical Health Insurance and enhanced pension contributions. • Enhanced parental leave and a workplace nursery scheme. • £500/year education budget with more expensive items (like conferences) covered with manager approval. • 33 days of leave across the year inclusive of bank holidays. • Flexible working, hybrid: minimum 2 days per week in our central London office. • ExTrac AI provides equal employment opportunities (EEO) to all employees and applicants for employment without regard to race, colour, religion, sex, national origin, age, disability, genetic information, sexual orientation, gender identity, or gender expression. We are committed to a diverse and inclusive workforce and welcome people from all backgrounds, experiences, perspectives, and abilities.
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