Frontend Developer – React

Xelix

React Developer implementing user interface components and collaborating with stakeholders at Xelix. Creating robust applications and mentoring team members while ensuring code quality.

Posted 5/13/2026full-timeLondon • 🇬🇧 United KingdomMid-LevelSenior💰 £60,000 - £75,000 per yearWebsite

Tech Stack

Tools & technologies

JavaScriptJestReactSDLCTypeScript

About the role

Key responsibilities & impact

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

What you’ll need

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.
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.

Benefits

Comp & perks

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

ATS Keywords

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Hard Skills & Tools

JavaScriptTypeScriptCSS3ReactREST APIsweb-socket solutionsperformance improvement strategiestestingcode reviewsdata visualization

Soft Skills

collaborationmentoringcommunicationproblem-solvingattention to detailpassion for testingrapid iterationteamworkknowledge sharinguser journey focus