Studio
Greys is a software studio. We work with international brands on commerce: the checkout, the payments, the infrastructure under it, and the tools their teams use every day. We know WordPress and WooCommerce best, and we also work on Magento and Shopify. Founded in 2014, based in Seoul, working across Europe and Asia.
Most of what we do is engineering you only notice when it is missing. A checkout that settles correctly in every market the brand sells into. A release process that survives an audit. A store where updating a dependency is a reviewable diff, not an afternoon of manual uploads.
The work has taken us from campaign platforms in Paris to commerce systems in Seoul and product launches across APAC. Along the way we built deep expertise in the Korean market — payments, identity verification, privacy law — because clients needed it and no one else had solved it. That specialism sits alongside the general work. It does not replace it.
Services
Commerce Engineering
Stores at scale: checkout, subscriptions, multi-currency, multilingual catalogues, ERP and fulfilment integration, performance work. WooCommerce is what we know best; we also work on Magento and Shopify where the brand already runs them.
Payments & Compliance
Gateway integration, regional payment methods, identity verification and privacy rules — the deepest Korean market coverage anywhere, on WooCommerce and Magento alike.
Platform & Infrastructure
Containerised deployment pipelines, environments that match, release automation, and the monitoring that lets you check a rollout actually worked.
Developer Experience
Tools for the teams behind the store: management platforms, CLIs, private package registries, dependency updates you can review before they ship.
Who runs it
Jonathan Grzes
Founder & Lead Software Engineer
Eight pull requests merged into WooCommerce core, three into GiveWP, and a plugin on WordPress.org since 2019.
Jonathan has been building for the web for twenty years, from Paris and Marseille to Melbourne, Tokyo and now Seoul, where he has lived since founding Greys in 2014. Most of that work has been for brands outside Korea, on their own platforms and their own markets.
Alongside the studio he is Lead Developer at Healy World, where he works on licence management, reward systems and market-specific integrations across Asia — including KYC for India and local payments and compliance for Korea. He previously built APAC campaign and platform work at Wargaming, and co-founded Hatchup, a Korean influencer-marketing platform that raised $350k before closing.
He works in French, English and Korean.
Selected clients and collaborators
Direct engagements and work delivered through partner agencies.
By the numbers
- Years building for the web
- 20+Years building for the web
- Studio founded
- 2014Studio founded
- Continents worked across
- 3Continents worked across