Lead AI Engineer – Pricing & Machine Learning

About Us
We are the clear market leader in our sector and one of the fastest-growing car buying companies in the world. In the UK we generate over 120,000 customer enquiries each month and purchase tens of thousands of vehicles over the same period.
We have successfully launched in the United States and have ambitious plans to scale nationwide.
We are a highly profitable, established business with the pace, ambition and freedom of a start-up. Our goal is to build a billion-dollar business within the next five years.
The Role
Every day we make thousands of pricing decisions. Every decision is a prediction. Every prediction affects profit.
We are looking for an exceptional Lead AI Engineer to build and continually improve the machine learning models that power our vehicle pricing engine across both the UK and US.
This is not a reporting, BI or traditional data role. It is a hands-on engineering position for someone who enjoys solving complex commercial problems using AI and Machine Learning. Working with our Head of Data & Pricing, our software engineers and the wider team, you will design, build, deploy and optimise production-grade ML models that improve pricing accuracy, increase conversion and maximise profitability.
If you enjoy turning messy, real-world data into intelligent commercial decisions and want to build AI systems that make an immediate impact on a fast-growing business, we'd love to hear from you.
Core Responsibilities
Design, build and deploy production machine learning models for vehicle pricing.
Develop AI-driven pricing models that continually learn from new data.
Analysing and preparing data, building pipelines and engineering features to improve prediction accuracy.
Monitor model performance, identify drift and continually retrain models.
Research and apply modern AI techniques where they deliver genuine commercial value.
Work closely with developers to integrate models into live production systems.
Translate commercial challenges into intelligent AI solutions.
Help shape the future AI capability of the business as we continue international expansion.
What We're Looking For
Extensive commercial experience building production ML models.
Excellent Python and SQL skills.
Strong experience in Data Engineering.
Experience with TensorFlow, PyTorch, XGBoost, LightGBM or similar.
Strong understanding of predictive modelling and feature engineering.
Excellent statistical and mathematical skills.
Experience deploying ML solutions into live production environments.
Commercial mindset focused on measurable business outcomes.
Comfortable working independently with significant autonomy.
Passion for staying at the forefront of AI and Machine Learning.
Why Join Apex8?
Work directly with an ambitious founder and leadership team.
Solve genuinely difficult AI and pricing problems at scale.
See your models making real commercial decisions every day.
Influence multi-million-pound revenue streams.
Opportunity for long-term equity based on impact.
Help shape the future of AI within a rapidly expanding international business.
Benefits & Perks
Contributory pension package.
Wellbeing and employee support programme.
Discounted gym memberships and GP service.
Retail and leisure discounts.
Regular social events.
Free Food Fridays and fresh fruit for onsite employees
Free on-site parking.
Discounted garage services.
Counselling and financial assistance helplines
Location
Flexible (UK based) with regular in-person collaboration

Work arrangement
Yes