Senior Frontend Engineer · Oxford, UK

Hi, I’m Callum.

I’m a senior frontend engineer in Oxford with twelve years of experience. I’ve built the Triumph Motorcycles parts finder and launched two products of my own, blot.tools and kacet. I’m confident working with React on highly interactive applications, static websites, and modern edge and serverless sites on Cloudflare Workers or Vercel Edge Functions.

Callum Bonnyman standing in front of a painted mural

Status

Open to roles

Senior frontend, remote or Oxford.

Latest launchblot.toolsPrivacy-focused web tools. TanStack Start on a Rust and WebAssembly worker backend.Own productBanburyshireRust compiled to WebAssembly on Cloudflare Workers. sigmx handles every interaction in under 10 kB.Own productkacetFreelance marketplace with smart-contract settlement, concept to MVP.

Client work

All work

Stack

  • TypeScript
  • React
  • Next.js
  • Astro
  • TanStack Start
  • Rust
  • WebAssembly
  • Cloudflare Workers
  • PostgreSQL
  • Sanity
  • Craft CMS
  • Storybook
  • Tailwind CSS

Experience

Full CV
  • Freelance · Senior Frontend Engineer2022 – Present
  • Transom Design · Frontend Engineer2022 – 2023
  • DEPT® · Frontend Engineer2021 – 2022
  • netzstrategen · Frontend Developer2019 – 2021
  • LFA Machines · Full Stack Developer2014 – 2019

Contact

Off the clock