
Joseph Ansell
Senior Product Engineer
Salary / Daily rate
London, UK
Freelance, open to permanent contract
Can come onsite
Skills
Languages
About me
Intro
Senior product-focused engineer with 8+ years experience delivering scalable web and mobile applications across React and modern JavaScript ecosystems. Experienced in improving performance across production systems, integrating third-party APIs, and shipping user-focused features within cross-functional product teams. Background in design informs a strong attention to UX, accessibility, and visual quality.
Work experience
Senior Developer
Planes Studio
Oct 2025 - Present
1 year 1 month
London, UK
– Delivered feature and performance improvements for the React Native health & fitness app "Mila Movement", reducing CMS API calls by 50% through optimised data fetching and caching, lowering infrastructure costs and improving initial load times. Implemented TV casting functionality and resolved device-specific Android usability issues to improve stability and UX consistency. – Rebuilt Faculty.ai's Ashby job board in-house using their API, enabling job search, filtering, and application submission directly within their Next.js / React platform. Increased Google Lighthouse performance scores to near 100% across categories while delivering new modules and UX improvements.
Developer
Made by ON
Oct 2025 - Mar 2026
6 months
London, UK
– Built a performant, SEO-optimised booking experience for Morro using Astro, including bespoke filtering components to support complex user journeys, and developed middleware to aggregate and normalise data across Storyblok CMS, PEX booking system, and Algolia, enabling a unified and reliable frontend data layer. – Enhanced the booking platform for Scape by improving filtering and search capabilities, integrating logic across PEX and Algolia to ensure consistent and accurate results, while improving usability of booking flows through refined data handling and user experience enhancements. – Improved reliability of the Storyblok backup platform by implementing granular error handling with clear diagnostics to prevent failures and streamline debugging, refined UI/UX to improve usability for internal users, and optimised GitHub Actions CI workflows reducing runtime by 80% (from 2 hours to 23 minutes) and significantly improving deployment speed and team productivity.
Developer
Codehouse
Jun 2025 - Oct 2025
5 months
London, UK
Developer
ON (madebyon.com)
Jul 2021 - Jun 2025
4 years
Greater London, United Kingdom
– Developed an in-house tool to back up and restore resources from clients' Storyblok websites, replacing the costly Storyblok plugin with a more flexible solution. Using Google Drive and its API, I created a GitHub Action to automatically download resources in JSON format from the past seven days. Built a standalone app for users to view, restore, and track backed-up resources, with a history feature to revert restored files when needed. The application integrated with Supabase for secure client access and file management. This tool enhanced our services and generated a new revenue stream by offering it as an add-on to our retainer packages. – Led development of "The-Bon", a responsive, multi-language shared accommodation website. Utilising a headless CMS to enable client-managed, multi-language content. Mentored junior developers throughout and delivered the project ahead of schedule. – Managed multiple estates of different clients, ranging across technology stacks. One of my primary responsibilities was to support the team across these estates day to day and deliver larger features for clients. Such as, PHP, Javascript/Typescript, different frameworks such as astro, Next JS and further technologies. – Collaborated with internal & external teams, including design, to provide guidance on UX and ensure high-quality user experiences and new features. – Worked closely with management teams to provide technical support for tasks such as website performance enhancements, SEO improvements and assessing new business initiatives.
Web Developer
University of the Arts London
Mar 2020 - Jul 2021
1 year 5 months
London, UK
– Collaborated with the UX team to develop high-quality responsive UIs for UAL's rebrand, adhering to responsive and accessible design patterns. – Led the migration of UAL's job opportunities site, transferring the CMS to WordPress and implementing Frontity's React framework. – Developed a Rest API to manage users and their vacations.
Web Developer
Soundings
Oct 2018 - Mar 2020
1 year 6 months
London, UK
– Built and managed multiple responsive, interactive and engaging websites for clients such as TFL, the Collective and The Hong Kong & Shanghai Hotels, alongside communicating with clients, co-workers and external developers to ensure results at the highest quality in sometimes incredibly tight turnaround times. – Built an interactive map with multiple data altering attributes using leaflet, as well as several full screen animations all animated with code.
Digital Designer
Scoota
Aug 2017 - Aug 2018
1 year 1 month
London, UK
– Designed and built engaging rich media digital adverts, which I brought to life through coding with CSS and Adobe Animate, along side creating new ad platforms for the company. Managed multiples briefs working with incredibly tight turn arounds, creating whole campaigns for clients from minimal assets on a daily basis. Working with companies such as Jet2, Virgin Fit Flop and Land Rover.
Digital Designer
wayve
Oct 2016 - Aug 2017
11 months
London, UK
– Designed, animated, scripted and built high quality responsive digital adverts, which would span across a whole range of devices and websites, simultaneously helping the company develop and improve their ad-building platform by giving detailed feedback and ideas. Attending meetings with clients to ensure their needs are met and deliver the highest quality of work possible. Working with companys such as Estee-lauder, McLaren, and the Financial Times.
Graphic Design Intern
F#
Jul 2016 - Oct 2016
4 months
London, UK
– Work within brand guidelines to create social media campaigns, applications, and display media units, working with the project managers to ensure clients' feedback and requests are met. – Created visual mockups to be used in sale pitches for Spotify and other media publishers. Designed work for the F# website and other internal projects
Education
Ravensbourne University London
Bachelor of Arts (B.A.), Graphic Design
2013 - 2016
3 years 1 month
– (BA Honours) 2.1