Mobile app backends

The app is the part users see. The backend is the part that decides whether it still works at 2am when fifty thousand phones wake up at once. We build the server side of mobile products — the API, the sync, the push, the media — as carefully as the screens on top of it.

What this covers

• Accounts, auth & sync, sign-in that doesn't lock people out, offline-first data with real conflict resolution, and a sync model that survives a flaky subway connection.
• APNs push & Live Activities, token management, the ActivityKit rate limits nobody warns you about, and minute-granular Lock-Screen updates that don't look stuck.
• Media pipelines, upload, transcode, and CDN delivery with signed URLs, so photos and video don't take down your origin.
• The API contract, versioned, typed, and documented, graceful under bad networks and the old app versions that never update.
• Observability, knowing which app build is erroring before the App Store review notices.

When teams call us

• You have an app and a prototype backend that got you to TestFlight but won't survive launch.
• Push or Live Activities are flaky and you can't tell whether it's your code or Apple's rate limiter.
• You're adding sync or offline and it's quietly turning into a distributed-systems problem.
• You're a two- or three-person app team and nobody actually owns the backend.

Related work

We usually build the app itself in the same engagement, so the app and its backend are designed as one system instead of two codebases stitched together after the fact. For products that also field hardware, see Manufacturing & fleet backends.