JSTBuild.
About JSTBuild

One studio. iOS only. Privately built.

JSTBuild is an independent development studio focused entirely on native iOS applications. We don't take on client project work — everything shipped here is designed and built in-house, end to end.

Why we work this way

Spreading across platforms and client work dilutes focus. Staying private and iOS-only means every decision — design, architecture, release — gets full attention instead of being split across unrelated projects.

What that looks like in practice

  • Built in-house. Every app is designed and written by our own team — never outsourced or handed off.

  • iOS only. Swift and SwiftUI, exclusively — no spreading thin across platforms.

  • Maintained long-term. Nothing ships and gets abandoned — we keep refining after release.

The team

Small by design — a team fully invested in every release.

Stefanos Troullas

Development Lead

Tools & technologies

The native iOS toolchain, end to end.

  • Swift
  • SwiftUI
  • UIKit
  • Combine
  • Core Data
  • Xcode
  • TestFlight
  • App Store Connect

Have a question?

We don't take on project requests, but we're happy to hear from you.

Get in touch