Frontend Engineer - Contractor

Gendo; Greater London; On-site; GBP 100,000 - 125,000; Full time

Job summary

A leading AI startup in Greater London is seeking a skilled Frontend/Web Engineer to rebuild and scale their marketing website using React and Next.js. The role involves enhancing site performance and implementing SEO best practices. Ideal candidates should have proven experience with frontend development and CMS integrations. This position offers the chance to work with a creative team and play a pivotal role in shaping the company's digital presence. Competitive day rates are available.

Benefits

Competitive day rate

Collaborative team environment

Opportunity to work with leading architects

Qualifications

• Proven experience building production-level sites in Next.js/React.
• Experience integrating with headless CMS platforms.
• Strong understanding of frontend performance optimisation and SEO.

Responsibilities

• Rebuild and extend marketing site in React (Next.js).
• Integrate with Basehub for non-technical teams.
• Implement new pages and components.

Skills

Production-level site building in Next.js/React

Frontend performance optimisation

SEO fundamentals

Design systems and reusable component libraries

Autonomous work in a fast-paced environment

Tools

React

Next.js

Basehub

Google Analytics

Google Tag Manager

Job description

About Gendo

Gendo is a revolutionary, browser-based AI platform designed to empower architects and designers to generate accurate, high-quality visual representations of their designs in seconds, not days - a huge improvement on existing workflows.

Within just 12 months of launching, we have 62,000+ architects and designers using Gendo to produce visualizations 100x faster than traditional workflows.

We pride ourselves on being a lean, focussed and efficient team formed of highly talented individuals. This, and our product driven mantra, led to us securing both substantial pre-seed-stage and seed-stage funding from renowned investors within the space, enabling us to expand our team and deliver on our ambitious vision.

What we value

At Gendo, design is our core mission. We believe in the power of tools to elevate creative expression and push the boundaries of architectural possibility.

We don't build in a vacuum. We have refined our technology in direct partnership with renowned firms including Zaha Hadid Architects, Benoy, KPF, and David Chipperfield Architects. We take an exploratory approach to product development, continuously innovating to solve the real-world challenges our users face.

Our ambition is massive. We are building a world-class team to transform the future of architecture, making cutting-edge AI tools accessible so creators can bring their boldest ideas to life with speed and precision.

Role Overview

We’re looking for a skilled Frontend/Web Engineer (Contractor) to help us rebuild, design and scale our marketing website, ensuring it is performant, flexible, and simple for our non-technical team members to manage.

The site is built with React (Next.js) and integrates with Basehub as a headless CMS. You’ll be responsible for improving site performance, extending the component library, and implementing best practices across SEO, analytics, and content workflows. As well as maintaining the high level of design and usability for our commercial to maintain, edit copy and content.

This role is perfect for an engineer who enjoys working at the intersection of product, marketing, and design helping us create a world-class web presence that drives user acquisition.

Key Responsibilities

• Rebuild and extend our marketing site in React (Next.js), ensuring scalability and maintainability.

• Integrate with Basehub so our non-technical teams can easily edit site structure and content.

• Implement new pages, components, and templates.

• Optimise site performance (Lighthouse scores, Core Web Vitals) and ensure accessibility standards are met.

• Implement SEO best practices, analytics tracking, and A/B testing frameworks.

• Ensure responsive design and cross-browser compatibility.

• Provide clear documentation for internal teams to update content and maintain workflows.

Requirements

• Proven experience building production-level sites in Next.js / React.

• Experience integrating with headless CMS platforms (Basehub experience strongly preferred).

• Strong understanding of frontend performance optimisation and SEO fundamentals.

• Experience implementing design systems and reusable component libraries.

• Strong design eye & portfolio demonstrating both graphical and technical skills

• Ability to work autonomously in a fast-paced startup environment.

It would be a bonus for you to have:

• Experience building backend services or API integrations to support marketing features and interactive components.

• Experience with analytics, tracking, and experimentation frameworks (e.g., Google Analytics, Segment, Google Tag Manager, VWO).

• Familiarity with web accessibility standards.

• Background in SaaS or product-led growth businesses.

Why join Gendo?

• Shape the web presence of a fast-growing AI startup backed by top investors.

• Collaborate with a creative, ambitious team and leading architects worldwide.

• Competitive day rate / project-based fee.

Interview Process

1. Submit your application

   1. Please highlight the most relevant previous experience.

2. Intro Interview

   1. A short interview to meet one of the founders and hear more about the role and company, and answer some early questions.

3. Take Home Task

   1. A short exercise to test technical skills and strategic thinking.

4. Task Interview

   1. An interview with the Gendo CTO to discuss your task submission and answer any of your questions.

5. Reference