IT & Software

Senior Frontend Engineer, Marketing Website

Synthesia

London · Greater London · United Kingdom

Overview

In this Senior Frontend Engineer role, you join the Website team to own the marketing site platform behind synthesia.io, including the component library, content model, and rendering stack. You will shape technical direction, contribute end-to-end, and raise the bar on quality, performance, and accessibility at scale. You’ll work on a composable marketing site used by millions of visitors to win new customers, collaborating with cross-functional partners to deliver reliable, on-brand experiences. This is a hands-on, impact-focused role with a clear line of sight to shaping the site’s future over the next 6–12 months.

Responsibilities
  • Build, scale and evolve the section library (Astro components, Sanity schemas, design tokens) to enable consistent, accessible pages
  • Own the content model by designing robust schemas that prevent misuse and enable correct-by-construction pages
  • Translate Figma specs into production, ensuring responsive, accessible delivery aligned with design intent
  • Extend the platform for AI-assisted development to generate on-brand sections from design specs
  • Maintain SEO integrity (canonicals, sitemaps, structured data, redirects) and avoid traffic cliffs on launch
  • Raise engineering standards across the website surface with thorough reviews, reusable patterns, and tests for fragile components
  • Maintain and extend localisation across nine locales and translation pipeline
  • Shape the platform’s technical direction for 6–12 months and drive adoption among content publishers
Key requirements
  • Five years of software engineering experience, with at least three in senior frontend roles for content-driven or marketing platforms
  • Deep frontend expertise in HTML, CSS, and TypeScript, plus strong component API design
  • Ownership of a Sanity content model with GROQ and Portable Text experience
  • End-to-end capabilities including SSR, serverless/edge runtimes, API routes, SQL, CI
  • Strong understanding of responsive design, cross-browser compatibility, and WCAG 2.2 AA accessibility
  • Accountability for performance, SEO, analytics, and conversion metrics on marketing sites
  • Excellent communication and collaboration skills
  • strong communication
  • collaboration and teamwork
  • attention to craft and detail
  • HTML
  • CSS
  • TypeScript

Reference: WJ-747_30835840

Apply now

Continue on the employer's official application - the same link they use for every candidate.

More jobs

This role is listed on GigBlows for discovery and search. Hiring decisions and applications are handled by the employer or their chosen application system.