Senior Frontend Engineer – Design System

🔥 0 minutes ago

🇬🇧 United Kingdom – Remote

💵 €120k / year

⏰ Full Time

🟠 Senior

🧑‍🔧 Mechanical Engineer

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Synthesia

WebsiteLinkedInAll Job Openings

501 - 1000 employees

Founded 2017

🤖 Artificial Intelligence

☁️ SaaS

🤝 B2B

🔥 Funding within the last year

💰 $200M Series E - Synthesia on 2025-10

Artificial Intelligence • SaaS • B2B

<Synthesia> Synthesia is a SaaS AI video platform that enables businesses to create studio-quality videos without cameras, microphones, actors, or studios by using AI avatars and synthetic voiceovers. The platform supports 160+ languages, one-click translation/localization, an AI screen recorder, brand management, collaboration and analytics, and enterprise-grade security (SOC 2 Type II, GDPR). It’s marketed primarily to teams and enterprises for training, sales enablement, marketing, knowledge management and internal communications, helping companies scale video production while reducing time and cost.

📋 Description

• Build, scale and evolve our design system: the component library, design tokens, and documentation that give product teams a consistent, accessible foundation to build on. • Extend our design system for AI-assisted development so AI coding tools and agents can use our components, tokens and guidelines as easily as people can, with Storybook as the backbone and machine-readable interfaces (e.g. MCP) layered on top. • Design component APIs that resist misuse, so AI and human developers alike can build with confidence. • Write high-quality, performant frontend code (React/TypeScript) and raise the bar for component craft and consistency across the engineering org. • Partner closely with design, product and engineering to define components together and take them all the way to something that holds up in production. • Make our components accessible by default, meeting WCAG 2.2 AA, and work closely with our Accessibility engineer to bake in best practices from the start. • Own the developer experience of the design system: clear documentation, guidelines, Storybook, sensible component APIs, versioning and smooth migration paths that make adoption easy for both human and AI consumers. • Implement and maintain theming, white labelling, and localization/RTL support so the system works for a global audience. • Continuously improve the system based on adoption metrics, contributor feedback and new platform capabilities. • Shape the technical direction of the design system over the next 6–12 months, championing its adoption across teams.

🎯 Requirements

• At least five (5) years as a software engineer, including three (3) at senior level, building frontend platforms, with real ownership of a design system or shared component library used across multiple products. • Deep frontend expertise: expert HTML, CSS and JavaScript/TypeScript, with strong React and familiarity with modern build tooling. • A strong command of component API design, versioning and the developer experience of shared libraries. • Experience (or strong interest) in making component libraries consumable by AI • Solid understanding of responsive design, cross-browser compatibility and web performance. • Comfortable building components to WCAG 2.2 AA / EN 301 549 and verifying them yourself with a keyboard and screen reader — accessibility is part of your definition of done, not a separate pass. • A strong sense of craft and attention to detail, and the ability to balance design intent with engineering constraints. • Strong communication and collaboration skills, and a passion for improving developer productivity and end-user experience.

🏖️ Benefits

• 25 days of leave + local holidays • Stock option plan • Professional development opportunities