Performance Tuning

• Ran 10 PostgreSQL and MS SQL servers on Ubuntu

  Designed, deployed, and maintained 10 PostgreSQL and MS SQL servers on Ubuntu Linux VPS, ensuring optimal server performance and reliability.

• Overhauled internal processes, saving 8,000 hours

  Overhauled internal processes, saving 8,000 hours by improving software architecture, systems, and scheduling efficiency.

• Administered 40 websites on Apache and Nginx

  Administered 40 websites on Ubuntu Linux hosting servers with Apache and Nginx, ensuring high availability and performance.

• Moved slow work onto a River job queue

  Moved slow work off the request path onto a River job queue — 15 worker modules, 8 scheduled tasks and 20 pg_cron jobs — so a request returns while the work behind it carries on.

• Built fail‑closed rate limiting and anti‑abuse

  Built fail‑closed abuse controls — 22 Redis‑backed rate limiters, Cloudflare Turnstile, request idempotency and an origin lock — so the platform sheds bots and floods instead of trusting its callers.

• A whole company on one small server

  Ran the whole company on one 512 MB single‑core host — a git forge, a web server serving seven domains, Tor, two alternate‑protocol servers, backups and intrusion banning — by treating 464 MB of usable memory as the binding architectural constraint.

• Built dead‑man's‑switch host monitoring

  Built dead‑man's‑switch monitoring that pings only while memory and disk are healthy, so a degraded host raises an alert by going silent — and caught six variable names saying "free" where the check correctly measured "available", an order of magnitude apart on a 464 MB box.

• A safety net that no longer costs half an hour

  Cut the site's browser‑driven quality gate from 1,636 seconds to 615 by scheduling its checks longest‑first through a worker pool bounded to four lanes, after measuring that alphabetical order cost 320 seconds against 224.

• An app that ate 41 MB a second, stopped

  Stopped an application filling memory at 41 MB a second — a recorded 111 GB of compressed pages on a 36 GB machine — by bounding every event stream, subscribing by event type and putting a rate budget on logging, taking 610,996 log lines down to 1,411.

• Took the test suite to 8.9 seconds

  Took the test suite from six tests over a sixty‑second limit to 135 passing in 8.9 seconds by profiling the main thread and removing the two calls it sat inside for 3,989 samples out of 4,017.

This work is part of what we offer as Site Reliability & Monitoring, System Administration, DevOps & CI/CD Automation, Platform & Solution Architecture, Technical Leadership & Consulting, Backend & API Development, Frontend Development and Infrastructure as Code.

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