Thijs Koerselman
Software Engineer & Composer
I am a software engineer with a particular interest in sound, music, and audiovisual composition. I design and developed apps, tools, and algorithms for platforms, installations and live performances.
In 2026, I got an idea for a social no-media platform. I am extremely excited about it, so that will be my priority for the foreseeable future. Details will follow soon, so stay tuned!
Featured
- 2017.09nowStaffTraveler work
A platform for airline employees to check real-time seat availability on staff travel (non-rev) flights. The community-driven app has over 1.15 million members answering around 40,000 load requests daily. We rebuilt the platform from scratch, and for the first eight years I was responsible for the business logic, backend, and infrastructure.
- 2019.052025.10Baymard Institute work
Baymard Institute conducts original large-scale UX research studies used by leading e-commerce companies worldwide. I developed their review tool for performing audits as well as internal tooling for constructing guidelines.
- 20192020Corona Dashboard work
A public dashboard for the Dutch Ministry of Health, visualizing the COVID-19 epidemic through charts and maps. It showed alert levels, infection rates, and other key metrics to inform the public. My role in the team was front-end developer.
- 2025.01Typed Firestore open-source
Typed abstractions for Firestore across server, React, and React Native. Define typed collection references once and have all functions automatically infer the correct types, with a thin wrapper around official Firebase SDKs.
- 2026.02GCP Job Runner open-source
A CLI tool to run scripts locally or on Cloud Run with zero boilerplate. Define jobs using Zod schemas for validation and execute them across local and cloud environments.
- 2023.05Isolate Package open-source
Packages monorepo projects with their internal dependencies into a standalone directory ready for deployment. Generates deterministic lockfiles and supports multiple package managers.