Securing Mobile Release Pipelines for Google Play and the App Store
Mobile delivery has two supply chains: the application build and the store submission. Both require controlled identities, reproducible artifacts, policy evidence and a release trail that can survive staff and credential changes.
Separate build, signing and submission
Use distinct identities and jobs for compilation, artifact signing and store upload. A build runner should not automatically inherit permanent store-administration rights. Protect production submission with an approval environment and restricted branch rules.
Manage credentials as production secrets
Store keystores, signing certificates, issuer IDs and API credentials in an approved secret manager. Limit access to the release identity, rotate where the platform allows it and document recovery procedures. Never place credential material in logs or build artifacts.
Make artifacts traceable
Record source commit, dependency lockfile, build environment, version code, artifact checksum and signing identity. Generate an SBOM and retain security-scan results. The submitted bundle should be attributable to one reviewed source state.
Shift store-policy checks left
Maintain a release checklist for privacy disclosures, data-safety forms, permission use, account deletion, SDK declarations, content rating and required screenshots. Treat policy metadata as versioned release evidence rather than remembering it after rejection.
Use staged rollout and operational gates
Submit first to internal or closed testing, validate installation and critical flows, then use a staged production rollout. Monitor crash-free sessions, authentication, payments and backend compatibility. Define who can halt or roll back the release.
Audit the pipeline itself
Periodically review repository permissions, runner trust, secret access, store roles and inactive accounts. Test certificate and account recovery before an emergency. A pipeline is not secure merely because the application passed a vulnerability scan.