Oliver Chen
oliver.chen@example.com+44 20 7946 0194linkedin.com/in/oliverchengithub.com/oliverchen
Summary
Frontend engineer with 7 years shipping React, TypeScript, and Next.js applications for SaaS and consumer products.
Experienced in design systems, accessibility, browser performance, state management, and collaborating closely with product and design teams.
Experience
Senior Frontend Engineer
Ledgerly | London, UK | January 2022 - Present
- Lead frontend delivery for a finance dashboard used by 9,000 monthly users across accounting and operations teams.
- Redesigned React table virtualisation and data fetching, reducing dashboard interaction latency by 58%.
- Built accessible form components with WCAG 2.2 AA coverage, cutting design-system defects by 41%.
- Implemented Next.js route-level performance budgets that improved LCP from 3.4 s to 1.8 s on key pages.
- Mentor 3 engineers through code reviews, testing strategy, and production release checks.
Frontend Engineer
ParcelPilot | Manchester, UK | May 2018 - December 2021
- Built React and TypeScript workflows for courier scheduling, route editing, and delivery exception handling.
- Shipped Playwright end-to-end tests that raised critical-flow coverage from 35% to 82%.
- Reduced JavaScript bundle size by 31% through code splitting, dependency audits, and image optimisation.
- Integrated GraphQL queries with optimistic updates, lowering perceived update time for dispatchers by 44%.
Web Developer
Studio North | Sheffield, UK | August 2016 - April 2018
- Developed responsive interfaces for ecommerce clients using JavaScript, HTML, CSS, and Node.js.
- Improved checkout conversion by 12% after rebuilding address lookup and payment error states.
- Created reusable component patterns that shortened campaign build time from 5 days to 2 days.
- Maintained accessibility checks and browser support across Chrome, Safari, Firefox, and Edge.
Skills
Languages
TypeScript, JavaScript, HTML, CSS, SQL
Frameworks
React, Next.js, Redux, TanStack Query, GraphQL
Testing
Playwright, Jest, React Testing Library, Storybook
Tools
Figma, Vercel, Webpack, GitHub Actions, Sentry
Education
- BSc Computer Science, University of Manchester
- AWS Certified Cloud Practitioner