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Xelix Logo Xelix · IT - Software Development

Frontend Developer - React

United Kingdom, London 60000.00 - 75000.00 GBP / Year · Job Posted January 26, 2026
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Job Description

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. 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.

Job Responsibility

  • Collaborating with designers and other developers to build websites from specifications produced in Figma
  • Creating visually appealing experiences using CSS3 for frontend applications
  • Implementing robust and scalable solutions
  • Developing, using and designing REST APIs and web-socket solutions to efficiently deliver application components
  • Performing testing and quality assurance activities on different browsers and devices to ensure compatibility and responsiveness
  • Implementing performance improvement strategies, testing, and measuring application performance
  • Mentoring other team members, sharing knowledge and experience, and helping improve our team's abilities in the process
  • Ensuring the quality of code by writing comprehensive tests and participating in code reviews

Requirements

  • Expert knowledge of modern syntax JavaScript and React
  • Proficiency in JavaScript, TypeScript and CSS3
  • Familiarity with modern application architecture and design patterns
  • Excellent understanding of the complete software development life cycle
  • Strong Computer Science fundamentals and problem-solving skills
  • Ability to effectively communicate complex technical concepts to team members and stakeholders
  • Passionate about testing, rapid iteration and collaborative problem solving. (e2e, unit tests, integration tests)
  • Knowledge in Test tools like Playwright, Jest

Nice to have

  • An interest and aptitude in data visualization, transforming complex datasets into intuitive visual representations
  • Skills in User Experience (UX) and User Interface (UI) design, demonstrating a keen eye for aesthetics and attention to user journeys

What we offer

  • 27 days of annual leave (including 3 days Christmas closing), with the option to roll over 3 days
  • Hybrid working with one day a week from our dog-friendly Hoxton office and on-site gym
  • Comprehensive private medical & dental cover with Vitality
  • Enhanced parental leave pay
  • Learning & development culture – £1,000 personal annual budget
  • We’re carbon-neutral and are working towards ambitious carbon reduction goals
  • Lots of team socials & activities
  • Annual team retreat
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