Carlo Mencarelli

Colorado, United States

Staff Engineer @ HackerOne. I write about the cloud, infrastructure engineering, software development, and engineering leadership. Maybe other things sometimes too.

Jun 20, 2025 aws observability

How to Know When You Are Throttled by Amazon's IMDS

You might not realize how often your instance accesses the metadata service(IMDS) for credentials. I faced puzzling failures that standard debugging couldn't explain. The cause? A little-known packet-per-second limit on link-local services. In this post, I’ll share my findings and solutions.

Jun 3, 2024 aws

Exploring AWS CloudShell: Key Features and Benefits

CloudShell is a little-used feature in AWS that is powerful, free, and flexible. It's a consistent experience across regions and uses. Here, I write my impressions of the service, good and bad.

May 14, 2024 aws community builders

Year 2, A Community Builder Retrospective

After renewing for year three, I take a few minutes to look reflect on year two. What did I do and what do I want to do more of?

Feb 6, 2024 meta

Why I Migrated from Medium to Ghost and How

I migrated Carlo.Cloud from Medium to a self-hosted Ghost blog in an afternoon. Why would I do that, and how?

Jan 30, 2024 aws ci/cd security

Integrating Inspector with GitLab CI/CD

Gitlab ships with Trivy support, but you are an AWS org using ECR. How do you reconcile the differences between the CI/CD and Inspector scans of your containers?