Senior Generative AI Engineer

In this senior role, you will own AI features end-to-end for Motorway’s GenAI initiatives, taking ambiguous problems through to production-grade, observable systems. You’ll build and harden retrieval, data foundations, and evaluation/monitoring to deliver reliable experiences for buyers and sellers. You’ll work closely with product managers to translate model behavior into business value and set engineering standards across the team. This is a hands-on, impact-driven opportunity at a fast-growing scale-up shaping the future of AI-powered car commerce.

• Competitive salary
• Equity scheme
• 25 days holiday
• Flexible working
• Private medical insurance via BUPA
• Pension scheme

• Own AI features end to end from problem definition to reliable, customer-facing systems
• Build retrieval and data foundations and treat retrieval quality as a first-class engineering concern
• Design evaluation and monitoring approaches focused on quality, reliability and safety
• Develop AI applications and agents using LLMs, orchestration, APIs and data systems with solid production practices
• Make model and cost/latency trade-offs and document reasoning for transparency
• Prototype rapidly, identify reusable patterns, and harden them into team-wide components
• Improve quality through code reviews, design feedback, and leading by example
• Communicate technical decisions to product managers and stakeholders with clear business implications

• Shipped AI or ML systems with real user impact and production awareness
• Strong Python and SQL proficiency for data work and grounding datasets
• Solid software engineering craft: testing, error handling, CI/CD, observability, MLOps practices
• Hands-on experience with GenAI stack: LLM APIs, retrieval and vector stores, tool-using agents, cloud infrastructure (AWS and GCP)
• Ability to reason about model failure modes (hallucination, prompt injection) and when to escalate or simplify
• Willingness to take ownership and drive features to production with measurable value
• Strong collaboration and feedback skills to elevate team quality

• Curiosity about how things work and persistence
• Honesty about limits and ability to involve others early
• Constructive reviewer with a collaborative mindset
• GenAI and AI feature development
• LLM APIs and agent design
• Retrieval and vector stores