Senior Generative AI Engineer

London. Posted 2 days ago

The role

Own generative AI features end to end, from an ambiguous problem to a reliable production system. Work covers retrieval, agent design, evaluation, guardrails and monitoring for LLM-powered tools used by sellers and dealers.

What you will do

Own AI features end to end, from an ambiguous problem through to a reliable, observable system.
Build the retrieval and data foundations these features stand on.
Design evaluation and monitoring approaches that make quality, reliability and safety measurable.
Build AI applications and agents using LLMs, orchestration, APIs and data systems.
Make calls on models, cost and latency, and document the reasoning.
Prototype quickly and harden reusable patterns into components the team adopts.
Raise the quality of work around you through code review, design feedback and example.
Explain technical decisions to product managers and stakeholders in terms of business impact.

Required qualifications

Experience shipping AI or ML systems that real users depend on
Strong Python
Working SQL
Software engineering practice: testing, error handling, CI/CD, observability and MLOps
Hands-on experience across the GenAI stack: LLM APIs, retrieval and vector stores, agents with tool use, structured outputs
Experience on cloud infrastructure (AWS or GCP)
Understanding of how models fail, including hallucination and prompt injection
Experience with evaluation of AI systems

Benefits

Competitive salary
Equity scheme
25 days holiday
Flexible working
Private medical insurance via BUPA
Life assurance
Pension scheme with 5% employer contribution
Enhanced family leave, e.g. 26 weeks full pay for maternity or adoption
24/7 Employee Assistance Programme
EV leasing scheme
Cycle to work scheme
Nursery salary sacrifice scheme

About the company

Motorway is the UK's largest online car-selling platform, connecting private sellers directly with over 8,000 dealers nationwide. Founded in 2017, it has raised £143 million in Series C funding.