Available to hire
Hi there! I’m Kingsley Okyere, a frontend-focused developer who loves turning ideas into fast, accessible, and scalable web experiences. I specialize in React, TypeScript, and modern frontend ecosystems, building large-scale apps and contributing to design systems. I enjoy collaborating with designers and engineers to deliver high-quality products that users love. In my spare time I explore new technologies, write about frontend best practices, and mentor junior developers.
I’m comfortable leading projects, coaching teammates, and delivering under tight deadlines in diverse teams. I thrive on problem-solving, multi-tasking, and balancing great UX with robust code. I’m excited to keep building delightful interfaces and helping teams achieve great things.
Skills
Language
English
Fluent
Work Experience
UI Developer at Bit Panda
September 1, 2025 - March 1, 2026Built and maintained complex frontend product flows using React, TypeScript, and Next.js; integrated GraphQL and REST APIs; implemented type-safe forms, multi-step workflows, and features in a design-system-driven frontend.
UI Developer at Bitpanda
September 1, 2025 - March 1, 2026Built and maintained complex frontend product flows using React, TypeScript, and Next.js; integrated GraphQL and REST APIs with robust error handling, loading, and success states; implemented type-safe forms, conditional rendering, and multi-step workflows within a design-system-driven codebase; debugged, refactored, and improved existing logic with a strong UX focus.
UI Developer at Onyx Data Platform
October 1, 2023 - July 1, 2025Collaborated with the Onyx Data Platform team to construct an internal web app tailored for Data Scientists, facilitating the creation of diverse Google Cloud Console tools; engineered multiple GraphQL APIs to integrate with backend microservices, enhancing system efficiency and connectivity.
UI Developer at GlaxoSmithKline
October 1, 2023 - July 1, 2025Collaborated with the Onyx Data Platform team to build internal web applications for Data Scientists, facilitating the creation of diverse Google Cloud Console tools; engineered multiple GraphQL APIs to integrate with backend microservices; focused on performance, reliability and UX.
Front-End Developer at Kline
January 1, 2022 - April 1, 2023Collaborated with the AdTech team to build an internal ad-lib library supporting display of ads on UK news sites, gathered requirements from multiple teams and vendors, and developed end-to-end testing.
Front-End Developer at New s UK
January 1, 2022 - April 1, 2023Owned code from initial business requirements to testing for an internal ad library supporting NewsUK sites (The Sun, The Times, Talksport); delivered features using ES6/TypeScript, Sass, ReactJS, Next.js, and testing with React Testing Library.
Senior Front End Developer at Kline
November 1, 2021 - December 1, 2021Led frontend development on a short-term engagement, coordinating with design and backend teams to deliver features on a tight deadline.
React Developer at Sky
November 1, 2020 - December 1, 2021Worked on the NOW TV web application, building the customer checkout journey end-to-end; collaborated in a cross-functional team and implemented end-to-end testing with Cypress; contributed to a design-system-driven frontend.
Front End Developer at Black Cat Solutions
March 1, 2020 - May 1, 2020Built a frontend React app for ICIS commodities data analytics platform; contributed to architecture and feature development.
Front End Developer at BlackCat Solutions
March 1, 2020 - May 1, 2020Built the front-end React application for ICIS commodities data analytics; contributed as a key member of an 8-person team to translate complex requirements into deliverables on time; integrated data visualization workflows.
Senior Front End Developer at VAT Global
July 1, 2019 - November 1, 2019Led creation of a CI/CD pipeline using CircleCI and AWS; integrated Optimizely for multi-variant testing; contributed to front-end architecture and performance optimizations.
Senior Front End Developer at River Island
October 1, 2018 - April 1, 2019Migrated legacy product pages to React and built HTML advertorial pages for marketing campaigns; integrated Optimizely for A/B testing and feature experimentation.
UI Developer at Royal Bank Of Scotland
January 1, 2018 - October 1, 2018UI development for a lending platform targeting business customers; utilized ES6, React, Redux, and MongoDB/Mongoose-powered APIs; collaborated with UX and backend teams.
Senior Front End Developer at Boston Consulting Group Digital Ventures
July 1, 2017 - December 1, 2017Led front-end development of an interactive SPA with real-time features (Google Maps integration, vehicle tracking), and contributed to a Node.js API gateway interacting with Ruby on Rails microservices; collaborated with DevOps to build CI pipelines using Kubernetes, Docker, and CircleCI.
Senior Front End Developer at AllSaints
June 1, 2016 - July 1, 2017Collaborated on global site development, continued modernisation of product and content pages using HTML5, CSS, Vanilla JS, and React/Redux; implemented a mobile-first prototype; connected front-end to NodeJS API with MongoDB.
Senior Web Developer at BBC WorldWide
June 1, 2015 - June 1, 2016Front-end and Drupal-driven development for BBC Store; worked with AngularJS 1 and Backbone on front-end; maintained PAL layer and single-page experiences; agile delivery.
Web Developer at BBC Worldwide
November 1, 2012 - June 1, 2015Worked on the BBC Store website, performing frontend and CMS-related tasks and collaborating with design and editorial teams.
Web Developer at BBC
November 1, 2012 - June 1, 2015Internal web application iBroadcast development; contributed to front-end architecture with HTML, CSS, JavaScript, Ember.js, and Handlebars; supported agile continuous delivery.
Junior Front-End Developer at Tag Worldwide
June 1, 2012 - November 1, 2012Worked on HTML email marketing designs and builds for clients including BT, Armisat, Accenture, HP; delivered responsive, accessible emails.
Design Intern at Yahoo Europe
August 1, 2010 - July 1, 2011Researched, sketched, wireframed, and mocked design concepts for pitches; produced web designs and mockups for live advertising campaigns and microsites.
Junior Front End Developer at Content Formula
October 1, 2009 - July 1, 2010Assisted in creative design and content publishing for intranets and websites using Drupal CMS and Microsoft SharePoint.
Junior Web Developer & Designer at Content Formula
October 1, 2009 - July 1, 2010Designed graphics and web pages for intranets and external sites; developed Flash applications and animations; used Drupal CMS and SharePoint for publication.
Education
BSc Multimedia Technology and Design (2.1) at Brunel University
January 1, 2007 - January 1, 2012BTECH National Diploma in Software Development (IT Practitioners) - DDM at City and Islington College
January 1, 2005 - January 1, 2007GCSEs (8 A–C) including English, Maths, Science, IT, Music, Art at Gladesmore Community School
January 1, 2000 - January 1, 2005BSc. Multimedia Technology and Design – Second Class (Upper Division) Honours (2:1) at Brunel University, Uxbridge, London
January 1, 2007 - January 1, 2012BTEC National Diploma in Software Development (IT Practitioners) at Gladesmore Community School
January 1, 2000 - January 1, 2005GCSE at Gladesmore Community School
January 11, 2030 - March 19, 2026Qualifications
Industry Experience
Software & Internet, Media & Entertainment, Professional Services, Retail, Education
Skills
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