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Senior Machine Learning Engineer

extrac.aiLondonProduct & Engineering
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Salary
Not listed
Job type
Full-time
Work mode
Remote
Experience
Senior
Posted
29 Sept 2026
Status
Open · checked 7d ago

About this role

ExTrac is hiring a Senior Machine Learning Engineer for a hybrid role based in London, requiring at least two days per week in the office. This position suits an experienced practitioner who wants to build scalable AI systems for geopolitical and intelligence challenges.

Role Overview

The Senior Machine Learning Engineer joins the machine learning team to manage modelling capabilities from end to end. The role involves partnering with software engineering and product design to build agentic systems, train domain-specific models, and translate research into production solutions for analysts.

Key Responsibilities

Design systems balancing research velocity with product constraints
Make technical choices regarding model selection, training, evaluation, and deployment
Deliver production-ready systems at scale from early exploration to reliable deployment
Maintain high standards for architecture, code quality, and research practices
Lead technical direction on major initiatives and mentor team members

Requirements

Eligible to obtain UK security clearance and be a national of a NATO member state, Australia, or New Zealand
Proven technical excellence in production systems, research applications, or early-stage ownership
Hands-on experience with model serving for small models and LLMs, agent orchestration, and retrieval systems
Rigour in evaluation and benchmarking
Strong engineering fundamentals for writing clean, maintainable code
Experience with modern coding agents and systematic workflows

Nice to Have

Early-stage start-up experience
Experience building agentic tools and harnesses
Background in domain-specific modelling problems
Strong written and verbal communication skills

Skills and Tools

Model serving
LLMs
Agent orchestration
Retrieval systems
Modern coding agents

Salary and Benefits

Competitive salary determined by skills and experience
Private Medical Health Insurance and enhanced pension contributions
Enhanced parental leave and a workplace nursery scheme
£500 annual education budget with conference coverage upon manager approval
33 days of total leave inclusive of bank holidays
Flexible hybrid working arrangements

About the Company

ExTrac operates as a decision intelligence company serving governments, defence organisations, financial institutions, and corporates. The company combines curated data sources, domain-specific AI, and human expertise to transform complex information into actionable foresight.

How to Apply

Candidates should apply directly on the official company careers page.

Skills and tech stack

Questions candidates ask

Where is the job located?

The role is hybrid, requiring a minimum of two days per week in the central London office.

What are the nationality requirements for this role?

Applicants must be eligible to obtain UK security clearance and hold nationality from a NATO member state, Australia, or New Zealand.

What benefits are included?

Benefits include private medical health insurance, enhanced pension contributions, enhanced parental leave, a workplace nursery scheme, an annual £500 education budget, and 33 days of leave inclusive of bank holidays.

What does the interview process look like?

The process consists of a 30-minute initial intro interview, a 45-minute technical assessment, a 45-minute system design assessment, and a 30-minute founder interview.

Ready to apply?

The application is on the official extrac.ai careers page.

Apply on company site