Mobile Application Engineer

About Sequester

Sequester is a privacy-first encrypted vault for personal photos and videos. We build software where security, reliability, and user trust are product features???not afterthoughts.

About this role

You will deepen Sequester's native mobile capabilities???bridging Flutter and platform APIs where users expect OS-level security, notifications, and media performance.

What you will do

• Build and maintain native modules (Swift/Kotlin) for camera, keychain, and OS integrations
• Debug platform-specific bugs in release builds and OS beta previews
• Optimize media capture, thumbnail generation, and background upload on device
• Collaborate with AppSec on secure storage, jailbreak/root detection policies
• Support release engineering with signing, provisioning, and store submission fixes

What we are looking for

• Strong iOS and/or Android native development experience
• Ability to work across Flutter boundary when features require platform code
• Understanding of mobile security APIs (Keychain, Keystore, App Attest)
• Ship discipline: feature flags, staged rollouts, crash monitoring

Location

Remote-friendly. We hire globally and collaborate async-first across time zones.