About Sebastian

I believe that positivity and patience fuel creativity, embracing the tension between love and curiosity for what I haven't learned. Honesty and kindness have been my guiding principles through most of my adult life. And as preachy as it sounds, they've helped me successfully combat obsessive perfectionism.

My professional path began in electrical engineering, building hardware and software for high-speed implosion-measurement controllers. I learned to understand the diligence required when dealing with Motorola assembly code, carefully digging through every cycle to maximize efficiency.

Learning on my own time inevitably exposed me to great, not-so-great, and amazing websites. Making heavy use of "view source" and O’Reilly books got me hooked on understanding how the web worked. I'd read as much as I could about PHP, AJAX, and building sites in Notepad. After moving to Berlin I earned my bachelor’s in Applied Media Sciences (Graphic Design). Working for a few small agencies inspired me to eventually move into full‑time web dev.

Outside of work, I enjoy making music, taking photos with cameras I restored, painting, woodworking, bouldering, tabletop RPG's, hyper-focusing on seemingly mundane topics, teaching my cat tricks, and trying to make a tiramisu that isn't terrible.

Open Source & Current Work

I actively contribute to open-source projects including opencode and sst.

Current work is mostly around Cloudflare, AWS, TypeScript, Go, AI-assisted engineering workflows, and small tools that make teams move with a little more confidence.

Projects

PHX Business API

View on GitHub
  • A lightweight API built on Cloudflare Workers and D1 SQLite.
  • Uses Hono, TypeScript, and Cloudflare primitives for serverless functionality.
  • Helped validate internal and international requirements for larger B2B API work.

Voiceover Talent Portfolio

Visit Site
  • A site for an internationally active voice actress and voiceover artist.
  • Built with React, GraphQL, Styled Components, Reach Router, and i18next.
  • Includes a private invoicing backend and API.
  • Currently being migrated toward Bun, Astro, TypeScript, Payload CMS, and Redis/KV.

GPTReview

View on GitHub
  • An early GPT-3 experiment for reviewing code diffs directly in GitHub PRs.
  • Used hundreds of times and built with Python and OpenAI APIs.
  • A small precursor to my current work with human-in-the-middle engineering workflows.