Danilo Velasquez - Staff Software Engineer and Platform Engineer. Insights on frontend development, web performance, CI/CD optimization, and systems architecture at scale.
Claude tends to mirror how you write, but the way you talk isn't always the way you best take in information. Here's how I tuned mine to how I actually process things, using retention tests instead of guessing, plus a prompt so you can build your own.
Moving from brute-force scaling to resilient engineering. How we implemented Redis, Circuit Breakers, and Node.js Clustering to stabilize the platform and reduce infrastructure costs by 60%.
A deep dive into debugging a high-traffic Node.js crashloop. How we diagnosed a 'Fan-Out' architecture issue that amplified DDoS attacks against our own backend, threatening our availability.
Learnings from instrumenting Prometheus in NodeJS applications and how it should be done in 2025+.
An Astro integration that exposes Prometheus metrics for your Astro site running with the Node.js adapter.
Our journey modernizing Germany's largest classifieds site, evaluating Next.js, Deno/Fresh, and Astro, and why Astro's islands were the right choice for our scale and challenges.
Quantifying the cost savings and developer productivity gains achieved by optimizing our CI/CD pipeline.
Reduce CI build times by optimizing the build process and Docker image creation for a massive Next.js application. Learn how we achieved a 9-minute CI pipeline!
A GitHub Action to compare Lighthouse CI results between branches, preventing performance regressions directly in your pull requests.
Delving into memory management and Jest worker optimization to further tame the CI beast and uncover hidden performance bottlenecks.
How we slashed CI build times and empowered a team of 100+ developers by tackling performance bottlenecks in a massive Next.js application.
Enhance your Lighthouse audits with field performance data from CrUX and Core Web Vitals using lighthouse-plugin-crux.
Easily integrate and view Lighthouse performance reports within your Vue, React, Svelte, or vanilla JavaScript projects with Lighthouse Viewer.
Analysis, diagnostic, and fix of a performance problem in a NextJS Application.
A small essay about when you could consider yourself a good software developer.