Webflow Developer

AI Jobster; Greater London; Hybrid; GBP 50,000 - GBP 70,000; Full time

Job summary

A leading AI video platform based in London is seeking a Webflow Developer / Front-End Engineer to enhance their marketing site. You will build and maintain pages in Webflow, implement custom front-end functions, and ensure high performance and SEO. The ideal candidate has strong HTML, CSS, and JavaScript skills, along with experience in Webflow and technical SEO. Join a rapidly growing company that prioritizes creativity and ownership in a collaborative team environment.

Qualifications

• Strong experience working with Webflow in a production environment.
• Solid fundamentals in HTML, CSS, and JavaScript.
• Comfortable working outside Webflow when needed.

Responsibilities

• Build and maintain pages and components in Webflow.
• Implement custom front-end functionality with JavaScript.
• Improve performance, accessibility, and technical SEO.

Skills

Webflow experience

HTML

CSS

JavaScript

Technical SEO concepts

Tools

AWS

Node.js

Job description

Synthesia is the world’s leading AI video platform for business, used by over 90% of the Fortune 100. Founded in 2017, the company is headquartered in London, with offices and teams across Europe and the US.

As AI continues to shape the way we live and work, Synthesia develops products to enhance visual communication and enterprise skill development, helping people work better and stay at the center of successful organizations.

Following our recent Series E funding round, where we raised $200 million, our valuation stands at $4 billion. Our total funding exceeds $530 million from premier investors including Accel, NVentures (Nvidia's VC arm), Kleiner Perkins, GV, and Evantic Capital, alongside the founders and operators of Stripe, Datadog, Miro, and Webflow.

About the Role

This role sits within our Marketing Website team, responsible for how Synthesia shows up to millions of users globally.

As a Webflow Developer / Front-End Engineer, you’ll work across Webflow, front-end code, and supporting tooling. You’ll collaborate closely with Design, SEO, Growth, and Engineering, and you’ll have real ownership over what ships to production.

Your mission is simple: build fast, reliable, and high-performing experiences on our marketing site, and help maintain the systems that support SEO, experimentation, and growth.

What you’ll be working on

• Building and maintaining pages and components in Webflow (CMS, localization, integrations)

• Implementing custom front-end functionality (JavaScript, animations, interactive widgets, forms, experiments)

• Supporting and extending internal SEO and automation tools (currently running on AWS)

• Working with Lambda functions, APIs, and simple backend services where needed

• Improving performance, accessibility, and technical SEO

• Collaborating closely with Design, SEO, Growth, and Engineering

• Shipping fast, iterating often, and keeping quality high

Skills and requirements

• Strong experience working with Webflow in a production environment

• Solid fundamentals in HTML, CSS, and JavaScript

• Comfortable working outside Webflow when needed (custom JS, embeds, APIs)

• Experience with technical SEO concepts (page speed, structured data, indexing basics)

Some extra skills that would be awesome

• Experience with AWS (Lambda, basic infrastructure, scripts, cron jobs)

• Familiarity with Node.js or similar backend runtimes

• Experience building or maintaining SEO tooling, scrapers, generators, or automation

• Knowledge of analytics and tracking setups (GA4, GTM, events)

• Experience working in a product-led or growth-focused environment

How we work

• Small team, high ownership, and meaningful impact

• Webflow is our main platform — but we regularly extend it with custom code and build custom tooling

• We care deeply about performance, maintainability, and clean implementations

• You’ll have real influence over technical decisions, tooling, and how things are built

This role is not for you if

• You only want to design in Webflow Designer and avoid code

• You’re uncomfortable touching JavaScript or backend logic

• You prefer rigid specs over solving open-ended problems

Why this role is unique

• Production traffic at real scale

• A role that spans Webflow, front-end engineering, and backend tooling

• Ownership over both UI and the systems behind it

• Room to grow inside one of the fastest-growing AI companies