{"id":13399,"date":"2026-05-22T12:43:09","date_gmt":"2026-05-22T12:43:09","guid":{"rendered":"https:\/\/sr2rec.com\/job\/senior-frontend-engineer-contract-outside-ir35\/"},"modified":"2026-05-22T12:43:09","modified_gmt":"2026-05-22T12:43:09","slug":"senior-frontend-engineer-contract-outside-ir35","status":"publish","type":"job_listing","link":"https:\/\/sr2rec.com\/en\/job\/senior-frontend-engineer-contract-outside-ir35\/","title":{"rendered":"Senior Frontend Engineer &#8211; Contract &#8211; Outside IR35"},"content":{"rendered":"<h2>Senior Frontend Engineer (Contract)<\/h2>\n<p><strong>Contract Length:<\/strong> 3-6 months<br \/> <strong>Rate:<\/strong> \u00a3550 &#8211; \u00a3600 p\/d<br \/> <strong>IR35 Status:<\/strong> Outside IR35<br \/> <strong>Location:<\/strong> Remote-first with occasional London visits<\/p>\n<p>We&#8217;re supporting an AI product company building a highly interactive, browser-based collaborative platform used by creative and design-focused teams globally.<\/p>\n<p>They&#8217;re looking for a <strong>Senior Frontend Engineer<\/strong> to help scale and evolve a complex frontend application that combines real-time collaboration, advanced rendering, multiplayer state management, and AI-powered workflows.<\/p>\n<p>This is not a standard CRUD-style React contract.<\/p>\n<p>The environment is heavily focused on frontend engineering quality, performance, interaction design, and solving technically challenging browser problems.<\/p>\n<hr \/>\n<h2>The Role<\/h2>\n<p>You&#8217;ll work closely with a small, high-calibre engineering team on a sophisticated web application that includes:<\/p>\n<ul>\n<li>Real-time collaborative experiences<\/li>\n<li>Advanced canvas-based interaction<\/li>\n<li>AI-assisted workflows<\/li>\n<li>Complex client-side state management<\/li>\n<li>Rich media and interactive rendering<\/li>\n<li>Performance-sensitive frontend systems<\/li>\n<\/ul>\n<p>The product is evolving rapidly, so this role suits someone comfortable operating in fast-moving startup environments where ownership and engineering judgement matter.<\/p>\n<hr \/>\n<h2>Tech Environment<\/h2>\n<ul>\n<li>React<\/li>\n<li>Next.js<\/li>\n<li>TypeScript<\/li>\n<li>WebSockets<\/li>\n<li>State management libraries (Zustand \/ Redux \/ MobX)<\/li>\n<li>WebGL \/ three.js<\/li>\n<li>react-three-fiber<\/li>\n<\/ul>\n<hr \/>\n<h2>What they&#8217;re looking for<\/h2>\n<ul>\n<li>Strong commercial experience building complex frontend applications in React<\/li>\n<li>Experience with highly interactive or real-time web products<\/li>\n<li>Strong understanding of frontend performance optimisation<\/li>\n<li>Comfortable working with advanced client-side state management<\/li>\n<li>Experience working in product-led engineering teams<\/li>\n<li>Ability to contribute technically from day one with minimal oversight<\/li>\n<\/ul>\n<hr \/>\n<h2>Particularly interesting backgrounds<\/h2>\n<ul>\n<li>Collaborative tooling<\/li>\n<li>Design platforms<\/li>\n<li>Browser-based creative applications<\/li>\n<li>Data visualisation products<\/li>\n<li>Real-time SaaS platforms<\/li>\n<li>Canvas-heavy or rendering-focused applications<\/li>\n<\/ul>\n<hr \/>\n<h2>Nice to have<\/h2>\n<ul>\n<li>Experience with multiplayer \/ collaborative systems<\/li>\n<li>WebGL or 3D rendering exposure<\/li>\n<li>Experience building performance-sensitive browser applications<\/li>\n<li>Comfort contributing across the stack where needed<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/counter.adcourier.com\/am9lLndhbm5lbGwuMjg0NzcuMTM3NzdAc3IycmVjLmFwbGl0cmFrLmNvbQ.gif\"><\/p>\n","protected":false},"author":678,"featured_media":0,"template":"","meta":{"_acf_changed":false,"inline_featured_image":false,"_promoted":"","_job_location":"London","_application":"joe.wannell.28477.13777@sr2rec.aplitrak.com","_company_name":"","_company_website":"","_company_tagline":"","_company_twitter":"","_company_video":"","_filled":0,"_featured":0,"_remote_position":0,"_job_salary":"550","_job_salary_currency":"GBP","_job_salary_unit":"DAY"},"job-categories":[54],"job-types":[],"class_list":["post-13399","job_listing","type-job_listing","status-publish"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Senior Frontend Engineer - Contract - Outside IR35 - SR2 Recruitment Group<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/sr2rec.com\/en\/job\/senior-frontend-engineer-contract-outside-ir35\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Senior Frontend Engineer - Contract - Outside IR35 - SR2 Recruitment Group\" \/>\n<meta property=\"og:description\" content=\"Senior Frontend Engineer (Contract) Contract Length: 3-6 months Rate: \u00a3550 &#8211; 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