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# Remote Senior Frontend Engineer, Marketing Website

- **Company:** Synthesia Limited
- **Location:** Lightwater, UK (Remote available)
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** HTML, Application Programming Interfaces (APIs), Data Analysis, Browser Compatibility, Cascading Style Sheets (CSS), Code Review, Responsive Web Design, SQL Databases, Tag Management, TypeScript, Web Content Accessibility Guidelines, Web Performance Optimization, Tailwind, Agentic-AI, Material UI, Front End Software Development, Api Design, Serverless Computing
- **Published:** October 4, 2026
- **Apply:** https://www.apply4u.co.uk/jobs/remote-senior-frontend-engineer-marketing-website/50374950

## About the Role

marketing platforms, Real ownership of a content model in Sanity. Deep front-end expertise: expert HTML, CSS and TypeScript, with a strong command of component API design and the developer experience of a shared library. Comfortable owning the server side as well as the front end: SSR, serverless and edge runtimes, API routes, a SQL database, secrets and CI. Solid understanding of responsive design, cross-browser compatibility and web performance, and comfortable building to WCAG 2.2 AA. You care that marketing sites are measured, on performance, SEO, analytics events and conversion, and you're happy being accountable to those numbers. Prior experience working on a large SaaS marketing website, at real traffic and with real stakes attached. Experience with AWS Lambda. Tailwind CSS v4, and experience working from a token-based design system. Experience, or strong interest, in making component libraries and content models consumable by AI agents. Analytics and tag
management implementation: dataLayer events, server-side tagging, getting attribution right without hurting performance. At Synthesia we're passionate about building, not talking, planning or politicising. 45 min call with the Head of Website about your past projects Our preference is for this role to be based either in-office or remote in London, UK. We can also accommodate remote workers elsewhere in Europe subject to compliance and right to work checks. This is full-time employment only, usually through OysterHR. No contractors possible.

## Description

agents, can build pages with, without breaking design, performance or SEO. Build, scale and evolve our section library: the Astro components, Sanity schemas and design tokens that let us compose marketing pages consistently and accessibly. Own the content model. Extend the platform for AI-assisted development, so coding agents can generate on-brand, on-spec sections from a design spec as reliably as a person can. Own SEO integrity as a first-class engineering concern: canonicals, sitemaps, structured data, redirects, and no traffic cliffs on launch. Raise the bar on engineering standards across the website surface: thorough code review, patterns others can follow, and tests around the parts that actually break. Shape the technical direction of the website platform over the next 6 to 12 months, and champion its adoption with the people who publish on it. At least five (5) years as a software engineer, including three (3) at senior level, building front end for content-driven or