Web applications
Customer portals, SaaS products, internal tools and dashboards — fast, secure, and built on a codebase your next developer will thank you for.
Now booking projects for 2027
Web & mobile apps, engineered to ship.scale.delight.ship.
HAY tech is an IT consultancy based in Belgium. We design, build and launch web applications and iOS & Android apps — from the first sketch to the App Store and Google Play.
Web apps
iOS & Android
Store release included
React
Next.js
TypeScript
Swift
SwiftUI
Kotlin
Jetpack Compose
Flutter
React Native
Node.js
PostgreSQL
Firebase
AWS
Docker
React
Next.js
TypeScript
Swift
SwiftUI
Kotlin
Jetpack Compose
Flutter
React Native
Node.js
PostgreSQL
Firebase
AWS
Docker
01 — SERVICES
Everything it takes to put your product in people’s hands.
One partner from idea to launch — and long after it.
Mobile apps
iOS and Android apps, cross-platform or fully native — whichever your product actually needs. Smooth, offline-friendly and battery-aware.
Product & UX design
Workshops, wireframes and clickable prototypes that turn a rough idea into screens people understand at first tap.
App Store & Google Play release
Developer accounts, review guidelines, privacy labels, screenshots and release pipelines — handled end to end.
Consulting & audits
An outside look at your architecture, code quality, performance or security, with a prioritised plan you can act on.
Maintenance & growth
OS updates, dependency upgrades, monitoring and new features after launch, so your app keeps earning its five stars.
02 — APPROACH
Why teams choose HAY tech.
Good software is mostly good decisions. We make them with you, out loud, and write them down.
01
Straight answers
Clear estimates, honest trade-offs, and no jargon where a plain sentence will do. If something isn’t worth building, we’ll say so.
02
Built to be handed over
Clean, documented code in your own repositories. You own everything we build — no lock-in, no black boxes.
03
Store-ready from day one
Apple and Google guidelines, privacy requirements and accessibility are designed in from the start, not patched in at review time.
04
One partner, web to mobile
Your web app and mobile apps share one team, one API and one roadmap — so features land everywhere at once.
03 — PROCESS
From first call to five-star release.
Five clear phases. Click through to see what happens in each.
01
Discover
We start with your users and your business goals, not a feature list. Together we define the problem, the must-haves for launch and what can wait.
YOU GET
Scope & priorities
Technical approach
Estimate & timeline
04 — START A PROJECT
Build your brief in three clicks.
Pick what fits, send it, and you’ll get a reply within minutes with next steps.