Senior AI Engineer

Mission Statement & Summary We're hiring a Senior AI Engineer to design and deliver 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 contribute significantly to technical direction, architecture, and implementation, translating defined business priorities into robust, production-ready systems. You'll make key technical contributions and work hands-on alongside engineers to deliver solutions that are reusable, scalable, and built for long-term impact. How You'll Contribute Design and implement AI systems end-to-end, contributing to technical direction and architecture Build LLM-powered and agent-based solutions from concept through to production Contribute to engineering standards, patterns, and reusable components across use cases Make informed technical decisions on models, tooling, infrastructure, and system design within agreed architectural direction Ensure systems are robust, observable, and production-ready (evaluation, monitoring, guardrails) Provide technical guidance and mentorship to engineers contributing to AI initiatives We're Looking For These Essential Skills Proven experience delivering production-grade AI systems end-to-end Experience designing and implementing complex AI systems across multiple use cases or domains Strong 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 operate effectively in ambiguous or fast-moving problem spaces Experience contributing to and influencing engineering standards and practices across projects It's a plus if you also have these skills Experience contributing to AI platforms or reusable frameworks and patterns Familiarity with LLMOps / MLOps and production evaluation practices 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 …and more, which you can explore here! 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. We work with Textio to make our job design and hiring inclusive. Permanent