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Senior React.js and React Native Developers

Job in Greater London, London, Greater London, EC1A, England, UK
Listing for: Join in Live
Full Time position
Listed on 2026-01-13
Job specializations:
  • Software Development
    Full Stack Developer, React.js, Software Engineer, Senior Developer
Job Description & How to Apply Below
Location: Greater London

Senior React.js and React Native Developers

Join to apply for the Senior React.js and React Native Developers role at Join in Live

The Role

We are looking for great React Native and React developers. Your primary focus will be on developing our React Web and Mobile SDKs and Twitch Extension. You will be working on adding new features to the product as well as fixing features.

Key Responsibilities

  • Developing new features for our web and mobile SDKs and Twitch Extension
  • Improve responsiveness and address any bugs
  • Collaborate with the team to define, design, and ship new features
  • Stay up-to-date on emerging frontend technologies

Minimum Requirements

  • Passionate, Curious approach to developing
  • Small team experience working in agile way
  • 3+ years experience as a React Native Developer
  • Knowledge of modern authorization mechanisms, such as JSON Web Token
  • Solid experience using/consuming REST APIs
  • Experience implementing testing platforms and unit tests
  • Appreciation for clean and well documented code
  • Experience with common front-end development tools such as Babel, Webpack, NPM, etc.
  • Excellent English communication skills with the ability to contribute to architectural discussions
  • Competent with revision control systems (Git)

Bonus Points

  • Experience or excitement developing Twitch Extensions
  • Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model
  • Experience with Agile development
  • Experience working with live sports data feeds and APIs (OPTA, Sportradar, etc)
  • A background in startups
  • Being a fan of live sports and watching sports

What We Are Using

  • React.js
  • Type Script
  • Jest
  • SASS
  • Webpack
  • Github (Github actions)

What Can You Expect From Us

  • Working directly with some of the greatest sports brands in the world – FIFA, UEFA, EPL
  • Work in an exciting fast paced tech start up environment
  • Working with sports and esports!
  • You have direct access to senior team members (CEO, CTO, VPs etc)
  • A hugely passionate team who will support you all along the way
  • Working with some of the latest technology creating a new experience for the public
  • Employee Stock (see below)

Being part of something very special as we change the way sports fans engage with content At Sport Buff, you are a key person of the team and company, and you will actually own some of the company you are building (with the employee equity scheme). Being part of this business at this stage gives you power to shape the business for the future, not just the product but the culture and team too.

We are committed to creating a diverse environment and are proud to be an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or status.

Seniority Level

  • Mid‑Senior level

Employment type

  • Full-time

Job function

  • Engineering and Information Technology

Industries

  • Broadcast Media Production and Distribution
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Position Requirements
10+ Years work experience
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