Hi, I'm Joseff

London

I'm a Senior Frontend Engineer currently working at Ben.

I enjoy building stuff and running.

Skills

Frontend

  • React
  • TypeScript
  • Next.js
  • Astro
  • JavaScript
  • Vite

Testing & QA

  • Jest
  • React Testing Library
  • Chromatic
  • Storybook

Data & Visualization

  • GraphQL
  • React Query
  • D3
  • Mapbox

Tooling

  • Datadog
  • Sentry

Freelance

Available for freelance work alongside my full-time role. Get in touch.

Technical Interviews & Hiring

I'll run your frontend technical interviews, assess candidates, and provide detailed feedback to help you make confident hiring decisions.

Code Reviews & Architecture

Get an outside perspective on your frontend codebase. I'll review your code, identify improvements, and advise on architecture decisions.

Short-term Projects

Focused frontend work on a part-time basis - a specific feature, a tricky refactor, or helping get a project over the line.

"I worked with Joseff to run some technical interviews for a full stack developer role. He was extremely professional, clearly very strong technically, gave great feedback and was amazing with the candidates. I would definitely work with Joseff again."

Experience

Freelance

Tech Lead

MyAnova

Jan 2026

Ran the hiring process for their first engineer, conducting interviews and providing feedback.

Employment

Senior Frontend Engineer

Ben

Feb 2023 – Present Promoted July 2024

Led key projects including a Total Reward Statement tool, a new platform layout with left navigation, and a dashboard redesign. Authored a frontend architecture guide adopted across teams and introduced Chromatic for visual regression testing.

Full Stack Developer

Greater London Authority

Feb 2022 – Feb 2023

Built interactive maps with React, Mapbox, and D3 for London policy teams. Delivered a SaaS tool for the London Assembly.

Software Engineer

GovernorHub

Feb 2021 – Feb 2022

Full-stack React and GraphQL development.

Graduate Software Developer

mkodo

Aug 2020 – Feb 2021

Foundations in TDD and Clean Code practices.

Work

Projects

Built at the Greater London Authority.

London Water Fountains Map

View map

Interactive map showing public water fountain locations across London.

ReactMapboxreact-map-gl

Sustainable Drainage Systems Map

View map

Interactive map for London's sustainable drainage infrastructure.

ReactMapboxreact-map-gl

Green Infrastructure Explorer

View map

Interactive map exploring London's green infrastructure network.

ReactMapboxreact-map-glMaterial UIreact-chartjs-2

Open Source

joseffdavies.com

View source

This website. Built with Astro.

AstroTypeScript

Contribution to react-jsonschema-form

View PR

Added fieldPathId to FieldTemplateProps to fix onChange path handling.