Independent Product Engineer · Netherlands

I build products that make complex systems feel simple.

Product engineering across interaction design, frontend and backend.
From LLM assistants for government to operational control software for one of Europe’s busiest airports.

See selected work me@timnuman.com

Selected work

2017 — present

Robin’s start screen: “Hallo, ik ben Robin, de veilige AI-assistent van JenV. Hoe kan ik je helpen?” above a question field

Ministry of Justice & Security · 2024 to present

AI-assistent Robin

An LLM-powered assistant used by 5,000+ employees. Designing interfaces that make AI useful, understandable and trustworthy — working across frontend, backend and AI integrations.

TypeScriptReact.NETLLMs

Royal Schiphol Group · 2022 to 2024

Wilbur

A data-driven operational control platform that helps airport operators make better decisions — translating complex operational data into intuitive interfaces.

Full stackFrontend-firstData visualisation

Pro4all · 2020 — 2021

Prostream

A new platform for web and mobile, built on TypeScript, React, React Native, Apollo and Nx — laying the technical foundation.

ECT Rotterdam · 2018 — 2019

MyTerminal

A modern logistics platform with React, Node.js and Elasticsearch that makes complex terminal processes easier to understand.

LeasePlan · 2017 — 2018

CarNext & LeasePlan Digital

Customer-facing products, with improvements to frontend architecture and developer experience.

Side projects

github.com/timnuman

Arpegginator

A MIDI step sequencer and arpeggiator for a Teensy 4.1. The Rust engine runs in the browser as WebAssembly and compiles natively for the hardware — six channels, multiple synth engines, scales, chords and arpeggios.

Rust · WebAssembly · React · Web MIDI

worktree-dash

A zero-dependency local dashboard for git worktrees: branches, dev servers, background processes and live logs in one place — with a Claude Code skill so AI agents can use it too.

Node.js · Git · Claude Code

About

I’ve been building software since the early days of the web, and I still feel most at home building products.

I enjoy understanding complex domains and turning them into software people actually want to use. My background spans interaction design, frontend engineering and backend development, but my focus has always been on the product itself.

Bachelor’s degree in Interaction Design, Utrecht School of the Arts.

Current toolkit

TypeScriptReactNode.jsPostgreSQLDockerAzureElasticsearchNxClaude CodeLLMsWebAssemblyRustOxc

Routines