Join to apply for the AI Engineer role at Xelix

Join to apply for the AI Engineer role at Xelix

This range is provided by Xelix. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more.

Base pay range

About Us

At 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, whilst remaining profitable. We have over 100 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 & we 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 Role

We are now hiring for a Mid-Level AI Engineer to join our growing AI Engineering team. This role is an exciting opportunity to leverage state-of-the-art technology, including the latest LLMs and AI technologies, to power our tools and develop impactful new solutions for our customers.

What You'll Be Doing

• Model Development: design, train, and evaluate end-to-end ML models - from preprocessing to deployment - working with text, vision, and tabular data.
• LLM & AI Systems: build and refine applications leveraging large language models, prompt engineering, and agentic frameworks to solve real-world business problems.
• Production Code: write clean, maintainable Python for AI/ML applications and collaborate with our back-end team to integrate seamlessly into the platform.
• Experimentation & Research: stay current with the latest AI/ML techniques, test new algorithms and tools, and improve upon existing approaches.
• Collaboration: work closely with product, data, and engineering teams to deliver high-impact, customer-facing features.
  
  

• 2–5 years’ experience delivering ML or LLM-powered features to production, from data prep and model training to deployment and iteration.
• Strong Python skills for AI/ML applications — clean, well-tested code, version control best practice, and smooth integration with back-end systems.
• Hands-on experience with gradient-boosted models (e.g., XGBoost, LightGBM) and/or building LLM-powered systems (e.g. tool/function calling, prompt design, evals) for text-heavy tasks.
• Solid data skills: SQL, pandas, experiment tracking, and cloud deployment (AWS a plus).
• A passion for AI/ML, shown through personal projects, a well-maintained GitHub portfolio, blog posts, or contributions to the AI/ML community.
• Strong collaboration skills — able to work closely with engineers, product managers, and data teams to ship impactful features.
  
  

• About us
• Xelix blog
• Xelix news
• Xelix glassdoor
  
  

• Introductory Call – A short Teams conversation with a Talent Partner to discuss your background and the opportunity.
• Hiring Manager Interview – A 30–45 minute Teams meeting to explore your experience and fit for the team.
• Technical Task or Presentation – A role-relevant exercise to demonstrate your skills and approach.
• Final On-site Interview – An in-person meeting with our senior leadership team and co-founders at our office.
  
  

Seniority level

• Seniority level

  Mid-Senior level

Employment type

• Employment type

  Full-time

Job function

• Job function

  Engineering and Information Technology

• Industries

  Software Development

Referrals increase your chances of interviewing at Xelix by 2x

Sign in to set job alerts for “Artificial Intelligence Engineer” roles.

London, England, United Kingdom 3 days ago

London, England, United Kingdom 1 week ago

London, England, United Kingdom 3 months ago

London, England, United Kingdom 1 month ago

London, England, United Kingdom 4 days ago

London, England, United Kingdom 2 weeks ago

London, England, United Kingdom 5 months ago

London, England, United Kingdom $50,000.00-$120,000.00 8 months ago

London, England, United Kingdom 2 weeks ago

London, England, United Kingdom 2 weeks ago

London, England, United Kingdom 2 weeks ago

Research Engineer, ML, AI & Computer Vision

London, England, United Kingdom 2 days ago

London, England, United Kingdom 4 weeks ago

London, England, United Kingdom 3 days ago

London, England, United Kingdom 1 month ago

London, England, United Kingdom 7 months ago

London, England, United Kingdom 4 months ago

City Of London, England, United Kingdom 2 days ago

London, England, United Kingdom 2 weeks ago

London, England, United Kingdom £80,000.00-£120,000.00 1 month ago

London, England, United Kingdom £80,000.00-£120,000.00 1 month ago

London, England, United Kingdom 2 weeks ago

London, England, United Kingdom 2 days ago

London, England, United Kingdom 1 week ago

London, England, United Kingdom £250.00-£300.00 1 month ago

London, England, United Kingdom 5 hours ago

London, England, United Kingdom 1 day ago

London, England, United Kingdom 2 months ago

London, England, United Kingdom 4 months ago

We’re unlocking community knowledge in a new way. Experts add insights directly into each article, started with the help of AI.