Senior React.js and Typescript Developers
Join to apply for the Senior React.js and Typescript Developers role at Sport BUFF
The Role
We are looking for great JavaScript/Typescript developers who are proficient with React.js. Your primary focus will be on developing our WebSDK and Twitch Extension. You will be working on adding new features to the product as well as fixing any bugs.
Key Responsibilities
- Developing new features for our web SDK 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
- 3+ years experience as a React.js Developer
- 3+ years experience in JavaScript/TypeScript
- Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model
- 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 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
- Experience or excitement developing React Native solutions
- 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
- TypeScript
- Jest
- SASS
- Webpack
- Github (Github actions)
What Can You Expect From Us
- Working directly with some of the greatest sports brands in the world
- 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
- A fantastic learning experience, with long term potential from being one of the first hires in what will become a significant team and product
- Employee Stock (see below)
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.
To apply, click here.
Location: London, England, United Kingdom
Seniority level: Mid-Senior level
Employment type: Full-time
Job function: Engineering and Information Technology
Industries: Broadcast Media Production and Distribution
#J-18808-Ljbffr”, “datePosted”: “2026-04-11”, “hiringOrganization”: { “@type”: “Organization”, “name”: “Sport BUFF”, “sameAs”: “https://uk.whatjobs.com/pub_api__cpl__402683075__4861?utm_campaign=publisher&utm_medium=api&utm_source=4861&geoID=33” }, “jobLocation”: { “@type”: “Place”, “address”: { “@type”: “PostalAddress”, “addressLocality”: “London” } } }Senior React.js and Typescript Developers
Join to apply for the Senior React.js and Typescript Developers role at Sport BUFF
The Role
We are looking for great JavaScript/Typescript developers who are proficient with React.js. Your primary focus will be on developing our WebSDK and Twitch Extension. You will be working on adding new features to the product as well as fixing any bugs.
Key Responsibilities
- Developing new features for our web SDK 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
- 3+ years experience as a React.js Developer
- 3+ years experience in JavaScript/TypeScript
- Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model
- 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 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
- Experience or excitement developing React Native solutions
- 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
- TypeScript
- Jest
- SASS
- Webpack
- Github (Github actions)
What Can You Expect From Us
- Working directly with some of the greatest sports brands in the world
- 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
- A fantastic learning experience, with long term potential from being one of the first hires in what will become a significant team and product
- Employee Stock (see below)
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.
To apply, click here.
Location: London, England, United Kingdom
Seniority level: Mid-Senior level
Employment type: Full-time
Job function: Engineering and Information Technology
Industries: Broadcast Media Production and Distribution
#J-18808-Ljbffr…