Mobile and Device App Engineer

SunAlgo; United States; Remote; USD 110,000 - 140,000; Full time

Job summary

SunAlgo develops Flutter apps in the Apple and Google stores and Android hardware with Kotlin in kiosk mode. The team ships live releases, maintains device apps, and holds API contracts to avoid breaking years-old builds.

We test on real hardware, reason about the backend, and collaborate with platform engineers to manage API changes and unattended deployments.

Qualifications

• Shipped an app to the Apple or Google store and maintained it beyond the initial release.
• Strong Flutter or Android skills with a willingness to work in the other.
• Handled API changes from external servers you didn’t control.
• Tested on real hardware before release; access to devices.
• Able to read and reason about the backend your app talks to.

Responsibilities

• Ship releases of a live Flutter app with state management and a typed HTTP layer.
• Maintain Android Kotlin apps, including TV and kiosk builds that run unattended.
• Guard API contracts to ensure old shipped builds aren’t broken by server changes.
• Work on device identity: pairing, tokens, and credential recovery.
• Handle release engineering: signing, staged rollouts, store reviews.
• Instrument post-release crash reporting and analytics and act on insights.
• Collaborate with platform engineers who own the API.

Skills

Flutter

Android

Kotlin

Release engineering

Crash reporting

Analytics

APIs

Hardware testing

Tools

Firebase

WebView

Capacitor

React Native

BLE

Job description

Our apps run in two quite different places. One is a Flutter product in the Apple and Google stores that clinicians and employers use in the field. The other is Android hardware installed in venues, running a Kotlin app in kiosk mode with nobody nearby to restart it.

They share a problem. An installed build stays in the field for a long time, so the API contract it depends on is effectively frozen, and a change on the server reaches the oldest version first.

What you would work on:

• Ship releases of a live Flutter app, including its state management, a typed HTTP layer, and the auth, messaging and crash reporting services behind it.
• Build and maintain Android device apps in Kotlin, including TV and kiosk builds that run unattended on hardware we don't control.
• Hold the API contracts that installed apps depend on, and design new surface so a server change never breaks a build that shipped two years ago.
• Work on device identity from the app side. Pairing, tokens, and recovering a unit that lost its credentials without sending someone to the site.
• Release engineering, including signing, staged rollouts, store review, and the guards that stop a mis-versioned build from going out.
• Instrument what happens after release with crash reporting and analytics, then act on what comes back.
• Work directly with the platform engineers who own the API, usually in the same week rather than across a quarter.

What we look for:

• You've shipped an app to the Apple or Google store and maintained it through review cycles and past its first release.
• Strong Flutter or strong Android, plus a genuine willingness to work in the other one.
• You've consumed an API you didn't control and handled the releases where it changed underneath you.
• You test on real hardware before a release goes out, and you have the devices or can tell us what you need.
• You can read and reason about the backend your app talks to, even when you're not the one changing it.

Nice to have:

• Android TV, kiosk mode, or device owner and managed provisioning.
• WebView-heavy apps and the bridge between native and web.
• Capacitor or React Native.
• Firebase, including messaging and crash reporting at scale.
• Biometric and local authentication.
• Any experience with connected hardware, BLE pairing, or device provisioning.