Mobile Application Security Tester

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 attack Sequester's mobile apps like a motivated adversary???testing local storage, IPC, backup exports, and jailbreak scenarios to harden the vault on device.

What you will do

• Perform static and dynamic analysis on iOS and Android builds
• Test PIN/biometric bypass attempts, clipboard leaks, and screenshot policies
• Validate certificate pinning, TLS settings, and debug build separation
• Document findings with CVSS-aligned severity and developer-friendly remediation
• Retest fixes before store releases and maintain mobile-specific test checklists

What we are looking for

• Mobile appsec testing experience (MASVS-aligned workflows welcome)
• Tooling comfort: Frida, objection, MobSF, adb, Xcode instruments as needed
• Understanding of Flutter/native bridge attack surface
• Responsible testing ethics???scoped devices and staging builds only

Location

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