Petri Lahdelma

React + TypeScript, Next.js, JavaScript, HTML/CSS.
DS (tokens, component APIs, governance), Storybook and AI-assisted dev tooling.

I’m a designer with strong frontend skills, not a pure generalist.

React + TypeScript (properly, not just “getting by”), with a big focus on anything design system component development and Storybook-driven workflows.

VertaaUX: AI UX, a11y, conversion audits and observability. Also building commissioned design systems: wrapping components, tokens, docs, and DX in Storybook.

Design systems + React/TS: components, tokens, governance, Storybook, DX. Also AI in UX/a11y/conversion audits + product observability. Say hey if you're shipping UI at scale.