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Security10 min read

Environment Variables: The Security Hole in Every Startup

Your .env file has your database password, Stripe secret key, and AWS credentials. It's in a Slack message, a developer's laptop, and probably a Docker image somewhere. Let's fix that.

By Jason TeixeiraNovember 15, 2025
SecurityEnvironment VariablesAWSDevOpsBest Practices
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Quick audit: where is your database password right now?

If you answered ".env file in the repo root" — you're in the majority. If you answered "also in a Slack message to the new hire, a screenshot in Confluence, and hardcoded in that one Lambda function that Dave wrote before he left" — you're being honest.

Environment variables are the most dangerous infrastructure in most startups because everyone treats them as an afterthought.

The Common Mistakes

Mistake 1: .env in Version Control

I've seen it in production repos at real companies. A \\

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What to do with this

Turn the note into a build path.

If this topic maps to a real business problem, keep reading the cluster, study the academy path, or route the work into a scoped engagement.

Jason Teixeira
Written by
Jason Teixeira
Founder, Sage Ideas Studio · Principal Engineer
livebuild a1556e22026-06-19 03:29Z
// solo studio// no analytics resold// every commit human-reviewed