[ 01 ]AWS

AWS IAM Least Privilege Without the Pain

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OnesDev Engineering Team

Full-Stack & Cloud Practice · · 8 min read

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Long-lived admin keys are how quiet accounts become loud incidents. OnesDev designs IAM so people and pipelines get the access they need — and nothing more — without freezing delivery.

Prefer roles over forever users

Humans assume roles with MFA. Apps assume roles via instance profiles, IRSA, or similar — not embedded access keys in repos. CI assumes a deploy role scoped to what the pipeline must change. This pairs cleanly with Terraform habits.

Start broad, then tighten with evidence

  1. Ship with a role that can do the job (documented)
  2. Use Access Analyzer / last-used signals to trim unused actions
  3. Add condition keys (source IP, MFA, VPC) where they reduce risk
  4. Review privilege quarterly with the account owner

Break-glass without drama

Keep a tightly audited admin path for emergencies. Log every use. Rotate credentials after. Break-glass is part of incident response— not a second root password in a chat channel.

Boundaries and landing zones

Permissions boundaries and SCPs stop accidental privilege creep when teams create roles. Multi-account layout makes blast radius smaller — see landing zones for product teams and the broader land, run, optimize path.

Next step

Explore AWS services or share how access works today (users, keys, SSO) — we will propose a least-privilege plan that still lets you ship.

O

OnesDev Engineering Team

Full-Stack & Cloud Practice

Engineers building and operating production Laravel, MERN, WordPress, and AWS cloud systems worldwide.

AWS Certified Architects & Senior Full-Stack Engineers

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