Senior Frontend Engineer, Marketing Website

Synthesia
London
Workplace: HybridFull timeFunction: Software EngineeringSkills: ["Communication","Collaboration","Code review","Attention to detail","Ownership"]

Own the website platform behind synthesia.io, including the component library, content model, and rendering stack used across the marketing site. Build and evolve Astro components, Sanity schemas, and design tokens to ensure composability, accessibility, and consistent performance/SEO at scale. Extend the platform for AI-assisted development, maintain localisation across nine locales, and raise engineering standards through testing, code review, and end-to-end ownership.

Loading

Loading job details...

Preparing the role view and application actions.

FursaFursa
Synthesia
Synthesia
1 day ago

Senior Frontend Engineer, Marketing Website

✓ Verified Job

Canonical indexed version, validated from employer's careers page.

Source: Company careers pageValidated by: Fursa AI
Last checked: 4 hours agoStatus: Live

Job Summary

Own the website platform behind synthesia.io, including the component library, content model, and rendering stack used across the marketing site. Build and evolve Astro components, Sanity schemas, and design tokens to ensure composability, accessibility, and consistent performance/SEO at scale. Extend the platform for AI-assisted development, maintain localisation across nine locales, and raise engineering standards through testing, code review, and end-to-end ownership.
Location: London
Workplace: Hybrid
Employment Type: Full time
Job Function: Software Engineering
Seniority: Mid level

Key Responsibilities

  • •Co-own the synthesia.io marketing site platform behind component library, content model, and rendering stack.
  • •Build, scale, and evolve the section library using Astro components, Sanity schemas, and design tokens for consistent, accessible page composition.
  • •Design and maintain schemas that enable correct-by-construction page building, including content model ownership and schema governance.
  • •Own SEO integrity and web performance concerns across canonical URLs, sitemaps, structured data, redirects, and launch stability.
  • •Maintain and extend localisation across nine locales and champion platform adoption over the next 6 to 12 months.

Key Requirements

  • •At least five (5) years as a software engineer, including three (3) at senior level, building front end for content-driven or marketing platforms.
  • •Real ownership of a content model in Sanity, including schema design and familiarity with GROQ and Portable Text.
  • •Expertise in HTML, CSS, and TypeScript, with strong component API design and developer experience for a shared library.
  • •Ability to work end to end, owning server-side and front-end including SSR, serverless/edge runtimes, API routes, a SQL database, secrets, and CI.
  • •Strong understanding of responsive design, cross-browser compatibility, web performance, and building to WCAG 2.2 AA.
Skills:CommunicationCollaborationCode reviewAttention to detailOwnership
Tech Stack:AstroSanityGROQPortable TextTypeScriptHTMLCSSFigmaSSRServerlessEdge runtimesAPI routesSQLCIServer-side taggingDataLayerTailwind CSS v4Cloudflare WorkersAWS LambdaWCAG 2.2 AA

Company Brief

Synthesia
Provides an AI video generation platform that creates realistic synthetic presenters and video content from text, enabling enterprises to produce scalable training, marketing, and communications videos without cameras or actors.
Industry: AI & Machine Learning
Company Size: Large (251 to 1,000 employees)
Growth: Scaleup
Valuation: Unicorn (USD 1B+)
Funding: Series C
Headquarters: London, United Kingdom
Founded: 2017
WebsiteLinkedIn