Lead AI Engineer

NewDay; Greater London; On-site; GBP 90,000 - 120,000; Full time

Benefits offered by this job

26 days holiday, rising to 30

Double matched pension up to 14%

Private medical insurance with mental health support

Free breakfast and lunch in the office every day

Job summary

NewDay is seeking a Lead AI Engineer to design and deliver AI systems within the United Kingdom. This hands-on role involves building production-grade solutions using LLMs, establishing engineering standards, and providing technical leadership. Responsibilities include owning end-to-end AI implementation and driving technical direction in dynamic environments. The position comes with generous benefits including 26 days holiday, private medical insurance, and a supportive working culture that values diversity. Join us to make a meaningful impact with AI.

Qualifications

• Proven track record of owning the technical direction and delivery of production-grade AI systems end-to-end.
• Experience designing and delivering complex AI systems across multiple use cases or domains.
• Deep expertise in generative AI / LLMs, including orchestration, prompting, and evaluation.

Responsibilities

• Own the technical direction, architecture, and implementation of AI systems end-to-end.
• Design and build LLM-powered and agent-based solutions from concept to production.
• Establish engineering standards, patterns, and reusable components across use cases.

Skills

Technical direction of AI systems

Delivery of production-grade AI systems

Experience with generative AI and LLMs

Strong software engineering fundamentals

Job description

Mission Statement & Summary

We’re hiring a Lead AI Engineer to own the design and delivery of AI systems across the business. This is a hands‑on role focused on building production‑grade solutions using LLMs and agentic systems, embedding AI directly into core business processes rather than building isolated prototypes. You’ll take high‑value problems and turn them into scalable, reliable systems used in real workflows, driving measurable business outcomes. You’ll have ownership of technical direction, architecture, and implementation, translating defined business priorities into robust, production‑ready systems. You’ll make key technical decisions and work hands‑on alongside engineers to deliver solutions that are reusable, scalable, and built for long‑term impact.

How You’ll Contribute

• Own the technical direction, architecture, and implementation of AI systems end‑to‑end


• Design and build LLM‑powered and agent‑based solutions from concept to production


• Establish engineering standards, patterns, and reusable components across use cases


• Own key technical decisions on models, tooling, infrastructure, and system design


• Ensure systems are robust, observable, and production‑ready (evaluation, monitoring, guardrails)


• Provide technical leadership and direction to engineers contributing to AI initiatives

We're Looking For These Essential Skills

• Proven track record of owning the technical direction and delivery of production‑grade AI systems end‑to‑end


• Experience designing and delivering complex AI systems across multiple use cases or domains


• Deep expertise in generative AI / LLMs, including orchestration, prompting, and evaluation


• Experience building agentic or multi‑step AI systems


• Strong software engineering fundamentals including APIs, system design, and cloud‑based architectures


• Ability to drive technical direction in ambiguous or fast‑moving problem spaces


• Experience influencing engineering standards and practices across multiple projects

Its a Plus If You Also Have These Skills

• Experience building AI platforms or reusable frameworks and patterns


• Familiarity with LLMOps / MLOps and production evaluation practice


• Experience embedding AI into core business processes or enterprise systems


• Experience working in large‑scale or regulated enterprise environments

What's in it for you?

• 26 days holiday, rising to 30 with service


• A holiday buy scheme (up to 5 extra days)


• Double matched pension, with up to 14% from NewDay


• Generous annual performance bonuses


• Private medical insurance with Bupa, including mental health support and cancer care


• 26 weeks paid maternity, adoption and shared parental leave


• Free breakfast and lunch in the office every day, provided by our in‑house chefs

At NewDay, we value all types of diversity. We’re an equal opportunity employer and believe that our differences create a vibrant, authentic working culture. We want all our colleagues to feel able to bring their whole selves to work. We don’t discriminate on the basis of protected characteristics or identities. We make sure that every job is crafted to be inclusive and that people with disabilities or caring responsibilities can take part in the application and interview process.

Tell us if you need accommodations: We’ll put reasonable adjustments in place to support you.

Permanent