README

Behind our services and selected work are Ayu and Sinyo Koene: a designer-strategist and a software engineer who keep strategy, design, code and AI in one loop. Twin sister and brother, building things side by side since 2001.

Ayu works across design strategy, service logic and product clarity. With a background in mechanical engineering, brand strategy and digital/service design, she translates complex systems, stakeholder needs and business goals into clear product direction, UX flows, interfaces and buildable scope.

Sinyo is a software engineer with a background in economics, business and AI. He designs the technical architecture behind web apps, internal tools, automations and AI-supported workflows — with a focus on systems that are useful, maintainable and ready to hand over.

They started early with emerging technology. Tiny Troubles, their family venture from 2019, mixed 3D art, generative code, storytelling, and blockchain thinking before Web3 became shorthand for a hype cycle. It did not become the big thing they imagined, but it taught them how small teams build in new territory.

Since 2022, AI has been part of their daily practice: research, design, development, QA, prototyping, and iteration. Not as a shortcut around thinking, but as a way to move faster through the work that used to slow small teams down.

eyay grew out of that combination: Ayu's product and design judgment, Sinyo's engineering depth, and a shared habit of staying close to whatever is changing next.

The studio is small by choice. The people you brief are the people who build. No account layer, no handoff chain, no context loss.

That is the story behind eyay: twin sister and brother, different disciplines, one room, building useful digital products with modern tools and a lot of ownership.

Building since 2001. Shipping as eyay from Amsterdam.