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Hi, I’m Jim Harris, a senior frontend developer specializing in React. I help teams build production web apps with a strong focus on custom-built UI and thoughtful UX. I’ve worked with digital agencies and product teams since 2006, supporting everything from lean startups to global organisations, with over a decade of production React experience.…

Jim Harris

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Hi, I’m Jim Harris, a senior frontend developer specializing in React. I help teams build production web apps with a strong focus on custom-built UI and thoughtful UX. I’ve worked with digital agencies and product teams since 2006, supporting everything from lean startups to global organisations, with over a decade of production React experience.…

Available to hire

Hi, I’m Jim Harris, a senior frontend developer specializing in React. I help teams build production web apps with a strong focus on custom-built UI and thoughtful UX. I’ve worked with digital agencies and product teams since 2006, supporting everything from lean startups to global organisations, with over a decade of production React experience.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Senior Frontend Developer at Evidence for Learning

June 1, 2024 - February 1, 2026

Designed and built a custom visual query interface for searching student performance records inspired by visual programming languages. Implemented a timeline-based filtering and comparison UI, drawing on UX patterns from DAWs and video editing packages. Innovate UK–funded greenfield project, meeting and exceeding key milestones and requirements throughout the project. From prototype to production in 12 months. Used by 1,200+ schools and colleges and 75,000+ practitioners.

Frontend Developer at Warner Music Group

February 1, 2024 - April 1, 2024

Launched a responsive social media dashboard empowering Dua Lipa's UK team to track the performance of their TikTok campaign creator posts. Added real-time insights through data visualisations and charts. Coordinated discovery of project requirements and user journeys ensuring the dashboard aligned with Warner’s strategic needs. Helped Warner UK win internal priority against a US tool.

Frontend Developer at Brighton and Hove Libraries

November 1, 2023 - February 1, 2024

Led the technical development of a public installation for the Everyone's Library campaign, delivering on time and within budget. Mentored client with technical skills, ensuring accessible, secure, and compelling experience for visitors. Achieved significant community impact with 2,000 contributions at Jubilee Library.

Frontend Developer at Alternative View Studios

October 1, 2021 - August 1, 2023

Architected and developed five educational game templates for Cambridge University Press, doubling the number of games available to their course designers. Reached millions of users in over 100 countries worldwide via their digital learning platform, Cambridge One. Collaborated with existing team to integrate new games with existing codebase, then drove refactoring from class to functional components and React Hooks.

Frontend Developer at Focus Group

May 1, 2019 - January 1, 2020

Created bespoke site-builder application enabling marketing department to publish and maintain corporate site to their ongoing requirements, with particular attention to SEO. Directed extensive user testing and usability studies, feeding directly into UI/UX design. Resolved long-standing IT limitations and steered them towards scalable frontend solutions including Vue.js.

Frontend Developer at Pegasus (Bayer AG project)

January 1, 2018 - May 1, 2018

React app development for Bayer AG in collaboration with health PR consultancy Pegasus; contributed to a high-quality frontend experience and performance.

Lead Frontend Developer at Network Rail

December 1, 2017 - December 1, 2018

Lead frontend work on the YouVsTrain website for a Network Rail campaign; delivered responsive interfaces and user flows that supported the safety-awareness initiative.

Frontend Developer at Filmstro

June 1, 2017 - October 1, 2017

Helped Filmstro secure £500k seed funding with a corporate site and React apps that previewed their innovative desktop music software.

Frontend Developer at Avalara

July 1, 2016 - December 1, 2016

Refreshed frontend of VAT Expert for Avalara, bringing it in line with brand identity and supporting a large user base (~30,000 users).

Lead Angular Developer at Velti

October 1, 2013 - July 1, 2014

Led Angular development on a Walkers competition site, coordinating the development effort for a campaign that attracted over a million entries.