Open to opportunities

Hi, I'm Sudhanshu Singh.

DevOps / SRE engineer. I migrated our platform to AWS and now run it solo for 50,000+ users: IaC, CI/CD, observability, and database reliability.

Location

Writing

Notes from production

Deep-dives on the reliability, performance, and cost work behind a 50,000-user platform: the real logs, numbers, and fixes.

View all posts
A timeline of package versions against a shaded seven-day quarantine band at 'today', with the install arrow pointing to the newest version old enough to have cleared the window.

2026-09-18 · 4 min read

Moving off npm

I moved a site off npm because npm 'keeps getting supply-chain attacks.' The package manager was the least important part of that sentence. A poisoned release is served the same way by every client, so the defenses that count are refusing to run install scripts and refusing to install anything published in the last week.

  • supply-chain-security
  • pnpm
  • npm
  • dependencies
  • nodejs
  • devsecops
  • package-management
Read more
A CPU profile of a wedged Node process collapsed into a single hot leaf, constructing a date formatter, sitting behind a connection-pool timeout that blamed the database

2026-08-29 · 8 min read

The Date Formatter That Froze a Production Worker

A background worker pinned at 100% CPU, every database call timing out on a pool checkout, and the pool nowhere near full. A blocked event loop makes a jammed process look exactly like an exhausted pool. The cause was a working-hours helper rebuilding a date formatter on every call, still live behind a second door.

  • nodejs
  • performance
  • event-loop
  • cpu-profiling
  • v8
  • timezones
  • debugging
  • production-incident
  • sre
Read more
A browser fetching a file past a Cloudflare challenge and POSTing the raw bytes to a small server on localhost, which writes them to disk

2026-08-21 · 11 min read

The Download Proxy Hiding in Your Browser

Archiving a few hundred wallpapers turned into a standoff with Cloudflare that curl and gallery-dl kept losing with a 403. The way through was a browser capability most scraping never touches, and the archive turned out to be rotting faster than I could save it.

  • web-scraping
  • cloudflare
  • http
  • cors
  • browser-automation
  • debugging
  • archival
  • electron
Read more