The Ultimate Checklist for Developer Operational Security (OpSec)

What is developer OpSec?

Developer operational security is the set of daily practices that prevents credentials, code, devices, and deployment access from becoming an attack path. It is continuous work: reduce exposure, restrict access, and respond quickly when a secret or account may be compromised.

1. Secrets management

• Never commit secrets. Keep .env and private-key files out of version control.
• Use an approved secret manager instead of sharing credentials through chat or email.
• Revoke and replace compromised keys immediately.
• Use separate credentials and permissions for development, staging, and production.

2. Local environment security

• Enable full-disk encryption and automatic screen locking.
• Use browser-local tools for sensitive JWTs, JSON, SQL, and environment files.
• Audit globally installed packages and remove software you no longer trust or need.
• Install operating-system and browser security updates promptly.

3. Code and repository security

• Sign commits when your organization uses verified commit policies.
• Run secret scanning before code is committed or pushed.
• Commit lockfiles and review unexpected dependency changes.
• Enable supported dependency and vulnerability alerts.

4. Authentication and access

• Use phishing-resistant MFA where available.
• Grant the minimum permissions required for the current task.
• Protect SSH private keys with passphrases and rotate keys that may be exposed.
• Remove stale accounts, tokens, and deployment credentials.

5. API and application security

• Validate webhook signatures before processing payloads.
• Apply context-appropriate validation and output encoding to untrusted input.
• Add rate limits and abuse controls to exposed endpoints.
• Keep secrets out of URLs, analytics events, logs, and error messages.

Keep the checklist active

Review these controls during onboarding, before major releases, and after any credential exposure. A checklist only reduces risk when the team can verify each control in the real environment.