JavaScript Engineer

🔒 Confidential Employer
Posted 7 May 2026
LOCATION
Not specified
TYPE
Contract
LEVEL
Mid-Senior level
CATEGORY
Software Engineering
This employer holds a UK Home Office sponsor license — sponsorship for this specific role is at the employer’s discretion

SKILLS

React JavaScript (ES6+) Node.js Webpack State Management (MobX) Test Automation (Jest, Nightwatch) AWS (S3, Cloudfront, Fargate, DynamoDB) WebSocket/WebRTC

FULL DESCRIPTION

[Employer hidden — sign up to reveal] is seeking a JavaScript Engineer for a contract role at a digital sports data firm. Location: [Employer hidden — view at passion-project.co.uk]. Rate: £450 – £550 per day. Type: Contract, On-site.

About the Role

As a senior Front End engineer, your role will be to Lead, architect, and build React/JavaScript projects in both client and server-side environments. Working with the team to connect engineering deliverables to client business objectives, providing estimates for JavaScript and React project work, modularizing goals into digestible chunks and tasks.

As a senior, you will be expected to craft and sole complex web applications and technical solutions using the latest JavaScript technologies. You will be involved with building a browser-based data tool, building beautiful and reusable UI components, and overcoming functionality challenges found in their web applications. React, ES6, mobx, mobx-state-tree, styled-components, next.js, WebSocket, WebRTC, WebGL, webpack, babel, jest, nightwatch.js, AWS S3, Cloudfront, Fargate, DynamoDB, Cloudwatch, CircleCI, Jenkins… are a few of the state-of-the-art techs you will work with.

About the Company

Founded in 2013, this digital sports data firm facilitate the capture of unknown fans, and deliver the tools required to engage them in a tailored fashion, turning them from passive fans into invested and engaged consumers, improving commercial value and ROI for their clients.

They data, app and web solutions are managed by a powerful digital experience platform. Helping professional sports clubs, leagues, federations, venues and the media make use of their engaged audience, and enable reach and engagement of passive audiences in a tailored manner.

Qualifications

  • 5+ years experience building scalable web-based JavaScript applications that work with and consume API data.
  • Experience developing web-based applications using ES6+, React, and Node.
  • Experience in the architectural concepts behind React, such as: state and data management, JSX, creating a componentized system, and Webpack.

How to Apply

If you like the sound of this role, please feel free to message us directly and use the Drag & Drop to send your CV, we will follow up with a call to discuss!

Contact: [Employer hidden — sign up to reveal]

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