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Security and Maintenance

The cost of a mobile app is mostly paid after launch. Security, dependency hygiene, platform upgrades, crash response, and privacy compliance should be treated as normal engineering work, not as occasional cleanup.

Security basics​

Every React Native team should document:

  • What sensitive data is stored locally.
  • Which values require secure storage.
  • How authentication tokens are refreshed and revoked.
  • Which logs must be redacted.
  • Which third-party SDKs handle user data.

Secrets handling​

Never hardcode secrets into the application bundle when they can be avoided. Standardize:

  • Environment separation.
  • Secret injection through CI or managed configuration.
  • Local developer access patterns.
  • Rotation procedures.

Dependency hygiene​

Dependency maintenance should include:

  • Regular review of third-party packages.
  • Tracking for React Native compatibility during upgrades.
  • Removal of abandoned libraries before they become blockers.
  • Clear ownership for native SDK updates.

Upgrade strategy​

Plan upgrades intentionally:

  • Review React Native and major dependency release notes.
  • Upgrade on a predictable cadence.
  • Test native builds early in the upgrade branch.
  • Keep custom native code documented so breakpoints are obvious.

Delaying upgrades for too long usually makes future upgrades more expensive.

Privacy and compliance​

Mobile apps often process regulated or user-sensitive data. Work with product and legal stakeholders to document:

  • Consent requirements.
  • Data retention expectations.
  • Account deletion behavior.
  • Analytics and marketing SDK boundaries.
  • Regional compliance differences.

Incident response​

Production incidents should have a clear path:

  • Triage severity.
  • Identify affected versions.
  • Contain rollout if needed.
  • Ship a hotfix or disable risky functionality.
  • Record what changed and why.

Maintenance rhythm​

A healthy operating cadence often includes:

  • Weekly dependency and crash review.
  • Release health review after each rollout.
  • Quarterly upgrade and architecture audit.
  • Periodic device matrix verification.

Team rule​

Security and maintenance are product responsibilities. If the work is not scheduled, it will be deferred until it becomes urgent and expensive.

Finish with the tooling checklist to define the default engineering stack.