Software Engineer - JavaScript - £500pd - 6 months - ID41847

Do you enjoy bringing together powerful tools to create seamless user experiences?Are you excited by the challenge of building a high-performance image viewer with real-world impact?Would you like to work with AI-assisted workflows and shape modular, scalable front-end architecture?Our client is searching for a JavaScript Developer to help deliver a custom web-based image viewer. This project will enhance an existing platform by integrating leading open-source libraries, offering developers a chance to make a meaningful difference in how complex data is visualised and explored.If you’re a pragmatic builder who enjoys clean code, smart integration and problem solving, this role could be just the opportunity you\’re looking for.Why This Role is GreatBuild something tangible that users interact with every dayUse OpenSeadragon and Fabric.js to deliver a fast, intuitive and rich visual experienceTake ownership of architectural design, module control and performance tuningShape features like zooming, annotations, gestures, and export toolsWork smarter using AI tools like Claude and Copilot to speed up developmentDefine best practices in testing, documentation and maintainabilityAbout YouIn this role, you’ll get to:Work with JavaScript ES6+ and bring strong async programming and event-handling skillsCombine multiple libraries into a single module with a clean APIExplore 2D canvas graphics, coordinate systems and overlay toolsGet hands-on with annotation features, gesture controls and audit logging systemsUse Alpine.js or quickly get up to speed with itFocus on delivering working, useful tools instead of chasing perfectionDevelop and test confidently with the help of unit and integration coverageIf you’ve worked with OpenSeadragon or Fabric.js before, that’s a bonusIf you understand image performance, WebGL, or have medical or scientific data experience, even betterBut what matters most is your curiosity and ability to apply existing tools creatively and effectivelyThe Tools You’ll Work WithJavaScript (ES6+)OpenSeadragon and Fabric.jsAlpine.js for modular integrationCanvas 2D graphicsClaude or GitHub Copilot for AI-enhanced codingTesting frameworks for full coverageWhat You’ll DeliverA JavaScript image viewer module with annotation and interaction capabilitiesClear documentation for configuration and integrationA suite of unit and integration tests with performance benchmarksA fully customisable tool that can be dropped into Alpine.js applicationsInclusion MattersHumand Talent Solutions and our client are committed to inclusive hiring and equal opportunity. We welcome applications from all backgrounds and do not discriminate on the basis of gender, ethnicity, age, disability, sexual orientation, religion or any other protected characteristic. Your skills and potential are what matter most.