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Design × AI

I design how teams work with AI.

Design systems for enterprise and the public sector taught me how organizations ship. AI is changing what shipping means. Everything on this site comes from that work: shipped systems, essays and talks.

Based in Helsinki, Finland.

View workBook a talkOpen for engagements
Petri Lahdelma portrait beside a hand-drawn diagram: people and context feed AI agents, which drive systems, contracts, orchestration and shipping toward better services and real impact. Handwritten note: systems help people build a kinder future.
ABB
Aalto
DNA
Elisa
Alma
A-lehdet
Metso
Nordea
OP
Fiskars
Enerkey
Finnair
Nokia
Kesko
VR
Intrum
Kone
SAP
Seppo

Thinking, building, teaching

Thinking

Design systems for bots

UI contracts that AI agents can't misinterpret. When agents touch your product, vague design systems create broken UI at machine speed.

Building

VertaaUX

Automated accessibility audits run by an agent pipeline, in production.

Teaching

DS Adoption Playbook

How to get teams onto a design system without slowing their releases. Free.
  • Agents are now consumers of your design system. What changes for contracts, governance and the team, in what order to change it and what should stay human.

  • Components get the budget, but the tools around them decide whether the system holds. Three shipped tools, three failure modes they close and an honest account of what building them costs.

  • Why your tool choices are design decisions — and what mine reveal about how I work.

Flagship case study

View all work →
Case study
design systems

Helsinki Design System

Public sector design system work with accessibility rigor and multi-team governance.
Public sectorA11yReact/TS
  • Raised WCAG AA compliance from ~65% to 98% across city digital services
  • Shared components adopted by 12+ city departments, eliminating ~40% of duplicated UI work
  • Cut new service launch time from 3 months to 6 weeks with pre-built accessible patterns
Skim in ~60sDecision log included

Booking talks, workshops and advisory

Tell me what you're shipping and I'll show you how I've handled something like it elsewhere.