Javascript developer css html Work, Jobs in London, Eng (with Salaries)

Webflow Developer / Front-End Engineer
Synthesia —London
- Full-time
- AWS
- JavaScript
- APIs
Senior Front-end JavaScript developer
Byte9 —London
- AWS
- Project management
- JavaScript
Front End Engineer
Ravelin Technology —London
- Full-time
- Hybrid work
- Analysis skills
- JavaScript
- APIs
- Annual leave
- Flexible schedule
Quick apply
Full-Stack Engineer II, Automation and Dev
CrowdStrike —London
- Full-time
- JavaScript
- Quality control
- APIs
Front-End Developer
Disturbia —London
- £60,000 a year
- Full-time
- Hybrid work
- JavaScript
- APIs
- Communication skills
Quick apply
Web Designer and Developer
Aarun Software Limited —Amersham
- £40,000 - £44,000 a year
- Full-time
- Hybrid work
- Azure
- DevOps
- Java
- Free parking
Quick apply
3d
Front End Developer
Solirius Reply —London
- £40,000 - £65,000 a year
- Full-time
- Hybrid work
- Azure
- AWS
- Analysis skills
- Annual leave
- Employee assistance programme
Quick apply
Engineering Systems Development Specialist
Southeastern Railway —London
- £60,000 a year
- JavaScript
- Software development
- Agile
- Annual leave
Quick apply
7d
Front-End Angular Software Engineer
Trimble —London
- Full-time
- Hybrid work
- Computer Science
- Engineering
- AWS
1d
Web Engineer
JINGDONG RETAIL (UK) LIMITED —London
- Computer Science
- English
- Bachelor's degree
Quick apply
14d
Software Engineer
Coordinated Care Continuum (3C) —London
- SQL
- JavaScript
- HTML
Software Engineer III, Full Stack, Commerce Safety
Google —London
- Data analysis skills
- Java
- SQL
3d
Lead Frontend Engineer
Acre Software —London
- Remote
- JavaScript
- Software development
- In-person
- Annual leave
- Flexible schedule
Senior Software Engineer I (JavaScript))
RELX —London
- Full-time
- JavaScript
- APIs
- Agile
- Employee assistance programme
- Employee discount
Software Engineer III - React / TypeScript, Gen AI, Frontend
JPMorganChase —London
- Full-time
- JavaScript
- Software development
- Agile
Senior Software Engineer I (JavaScript))
Elsevier —London
- Full-time
- JavaScript
- APIs
- Agile
- Employee assistance programme
- Employee discount
Senior Shopify Developer - 6 Month Fixed Term
Pulsio —London
- £50,000 - £60,000 a year
- Full-time
- Hybrid work
- JavaScript
- AI
- HTML
Quick apply
Front-end Developer (Neasden, NW London)
Dazzle: Commercial & Office Cleaning | London —London
- Up to £45,000 a year
- Hybrid work
- Computer Science
- Bachelor's degree
- JavaScript
Quick apply
Senior Frontend Developer
Sonata One —London
- Azure
- Bachelor's degree
- JavaScript
Sr. Frontend Engineer - Counter Adversary Operations Team (Hybrid, UK)
CrowdStrike —London
- Full-time
- AWS
- JavaScript
- HTML

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Webflow Developer / Front-End Engineer

Synthesia
London

Apply Now

Job details

Full-time

Qualifications

Node.js
CSS
AWS
JavaScript
SEO
APIs
Communication skills
HTML

Full 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

Apply Now

Refine Your Search

javascript developer css html jobs in london, eng

Webflow Developer / Front-End Engineer

Senior Front-end JavaScript developer

Front End Engineer

Full-Stack Engineer II, Automation and Dev

Front-End Developer

Web Designer and Developer

Front End Developer

Engineering Systems Development Specialist

Front-End Angular Software Engineer

Web Engineer

Software Engineer

Software Engineer III, Full Stack, Commerce Safety

Lead Frontend Engineer

Senior Software Engineer I (JavaScript))

Software Engineer III - React / TypeScript, Gen AI, Frontend

Senior Software Engineer I (JavaScript))

Senior Shopify Developer - 6 Month Fixed Term

Front-end Developer (Neasden, NW London)

Senior Frontend Developer

Sr. Frontend Engineer - Counter Adversary Operations Team (Hybrid, UK)

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