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@cabinetoffice @Advancii @TuitionFlow @Themearr @Keystone-Operations

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calum523/README.md

Calum Harker

Product engineer based in England. I build self-hosted tools, SaaS products, and mobile apps — mostly TypeScript, C# / .NET, and Swift.

Currently at Keystone Operations. Previously at the Civil Service.


Selected work

Themearr · public

Self-hosted movie theme song downloader for Plex, Jellyfin, Emby, and Kodi. Reads your library from Plex or Radarr, finds theme audio on YouTube, and writes theme.mp3 into each movie folder — arr-style automation with Docker, health checks, and webhooks.

themearr.com

Product engineering · private

Most of my day-to-day work is in private product repos across a few teams:

  • Keystone Operations — Operations platform for hospitality: integrations, auth, and internal tooling.
  • Advancii — AI platform for intellectual property: patent workflows, SaaS reporting, and tooling for IP teams.
  • TuitionFlow — Tutoring operations: scheduling, billing, family onboarding, and tutor-facing apps.

I also maintain a handful of personal side projects — Next.js apps, iOS experiments, and templates — kept private until they are worth showing publicly.


Stack

TypeScript · Next.js · React · C# / .NET · Swift · Docker · PostgreSQL · Vercel


Elsewhere

Popular repositories Loading

  1. desktop desktop Public

    Forked from desktop/desktop

    Focus on what matters instead of fighting with Git.

    TypeScript

  2. calum523 calum523 Public

    GitHub profile README for calum523