AI Engineer

Xelix
London, United Kingdom£65k–£75kPosted Jul 12, 2026
Apply
This website uses cookies to ensure you get the best experience. Xelix and our selected partners use cookies and similar technologies (together “cookies”) that are necessary to present this website, and to ensure you get the best experience of it. If you consent to it, we will also use cookies for analytics purposes. See our Cookie Policy to read more about the cookies we set. You can withdraw and manage your consent at any time, by clicking “Manage cookies” at the bottom of each website page. Accept all cookies Decline all non-necessary cookies Cookie preferences Select which cookies you accept On this site, we always set cookies that are strictly necessary, meaning they are necessary for the site to function properly. If you consent to it, we will also set other types of cookies. You can provide or withdraw your consent to the different types of cookies using the toggles below. You can change or withdraw your consent at any time, by clicking the link “Manage Cookies”, which is always available at the bottom of the site. To learn more about what the different types of cookies do, how your data is used when they are set etc, see our Cookie Policy. Strictly necessary These cookies are necessary to make the site work properly, and are always set when you visit the site. Vendors Teamtailor Analytics These cookies collect information to help us understand how the site is being used. Vendors Teamtailor Accept these cookies Decline all non-necessary cookies Skip to main content Career menu Employee Log in as employee Candidate Log in to Connect Share page Facebook X LinkedIn Mail AI Engineering · London · Hybrid AI Engineer Join the fun - apply now! About usAt Xelix, we work with some of the world’s largest companies to automate and strengthen their financial controls. Our AI solutions redefine how Accounts Payable teams operate – moving from manual processes to automated, intelligent workflows.Xelix is a fast-paced scale-up – things move fast and expectations are high. We raised our Series B with Insight Partners in June 2025 and are expanding aggressively. We have a team 150 talented people pulling together to achieve our goals. Everyone is trusted to take ownership, move fast and have a meaningful impact. We prioritise personal and professional growth, keep things fun, and love to celebrate a milestone together.In this role you’ll grow, be challenged and help shape the future of Xelix. If you’re excited about building something special with us, we’d love to hear from you.About the roleWe are hiring an AI Engineer to join our growing AI Engineering team. You’ll design and build production AI systems — combining machine learning, large language models, and strong engineering — to solve real problems across documents, email, and financial data.We focus on building systems that work reliably in production, not just prototypes. We use modern AI tools extensively in our workflow, enabling engineers to operate at a higher level — focusing on system design, product thinking, and solving complex problems.What you'll be doingAI Systems & Agents: design and build production AI systems — including agent-based workflows, tool use, and multi-step reasoning.Model Development & Adaptation: develop and improve models across text, vision, and structured data, including fine-tuning and hybrid ML + LLM approaches.LLM Platform Work: work with hosted and self-hosted models, contributing to decisions around model selection, performance, and cost.Production Engineering: write clean, maintainable Python and contribute to scalable, observable systems.Evaluation & Iteration: design evals, measure performance rigorously, and improve systems using real-world...

Want jobs like this matched to you?

Swoopd scores fresh postings against your résumé so you only see the matches that matter.

Get started free