James
Chapman
Senior Full-Stack TypeScript Developer
About
Building great software,
one team at a time.
SC Cleared senior developer with 15 years of commercial experience building TypeScript and React applications across public sector, enterprise, and start-up environments. I hit the ground running in new teams, deliver pragmatic solutions under tight deadlines, and raise engineering standards through improved test coverage and architecture. I can work as an embedded developer or step into a senior or lead capacity - mentoring others and shaping technical direction. I build strong working relationships at all levels and am known equally for technical rigour and a sense of humour.
SC Cleared
ActiveObtained 2025 · Valid until 2032
Security clearance obtained through UK government vetting processes. Available for classified public sector engagements.
Skills
Technical expertise
Languages & Frameworks
UI & Styling
Tools & Practices
Experience
Work history
Full-Stack JavaScript Developer (Contract)
Government Department
Delivered a proof-of-concept application for a government department in 8 weeks. Integrated with an agentic AI backend for data analysis and text summaries. Used mapping and graphing tools including Recharts and D3.
Senior UI Developer (Contract)
Government Department
Redeveloped the case management system handling case materials and evidence. Introduced automated unit and end-to-end testing from scratch, significantly improving code confidence and maintainability.
Lead Frontend Developer
Software Company
Led a team of five frontend developers across three software brands. Collaborated across teams to synchronise ways of working and establish shared technical standards.
Earlier work history (pre-2020) available on request.
Projects
Notable work
Government Department
AI data analysis application with agentic backend integration, mapping, and graphing.
Government Department
Casework management system redevelopment covering case materials and evidence.
Government Department
GDS "Transfer to Trade" exemplar - a reference implementation for government digital services.
Government Department
GDS backend portal for voter card applications following the Elections Act.
Household Brand
Complete redevelopment of the main website with headless CMS architecture.
Government Department
Redevelopment of the Civil Service jobs search board and careers website.
Household Brand
Complete redevelopment of clients' website, one of the UK's largest home improvement e-commerce sites.
Testimonials
What colleagues say
"James consistently demonstrates professionalism and technical excellence, delivering high-quality, GDS-compliant software. Beyond his technical skills, he has shown strong leadership through mentoring and fostering collaboration across teams. He also has a rare ability to translate technical concepts into plain English - invaluable on a delivery team."
Delivery Manager
"James has been a pleasure to work with, as well as being a skilled frontend engineer. He's always shipped work very quickly and has a keen eye for detail - I'd strongly recommend him as an addition to any team or project!"
Principal Software Engineer
"James was one of those developers you could go to with a complex or poorly formed statement of work, and he'd be able to break it down and run with it with minimal input. He'd often come back with an array of solutions, giving the pros and cons of each to help a non-technical person understand what each would deliver."
Senior Product Owner
Contact
Get in touch
Available for remote and hybrid contracts. SC cleared for public sector engagements.