The systems I have shipped and still maintain, and the tools I reach for when starting something new.
Designed, written, and operated solo ยท dnschkr.com
A domain intelligence platform that analyzes more than 240 million domains a day. I own every layer: ingestion, the Elasticsearch index, the API, the front end, and the servers it runs on. Nobody else has ever had a commit in it, which is either a good sign or a warning, depending on your view of bus factor.
790+ articles, single author
Field notes on shipping real systems, written from work that went to production rather than from tutorials. The bulk is WordPress, Linux, DevOps, and application security, roughly 130 pieces each, then databases, JavaScript, CSS, AI engineering, and regex.
Privacy-first comment system
Threaded comments, reactions, and star ratings you embed with one script tag, funded by subscriptions instead of by watching the people reading your site. AI moderation, a REST API, and TypeScript SDKs.
14,333 licensed providers, Texas first
Daycare Index is a childcare directory covering 14,333 licensed providers across Texas. Parents search by city or ZIP, then compare programs and ages, hours, locations, and licensing and inspection information side by side. Listings are ordered on the record alone: nobody can buy a better position, and there is no sponsored tier.
51 states and DC, 8 practice areas
An independent attorney directory built on state bar records rather than paid placement. No firm owns it and nobody can buy a better position in the listings.
Sinhala song lyrics archive
Sri Lankan music is badly served online, so I built the archive I wanted to exist. Thousands of Sinhala lyrics, searchable, with no popups between you and the words.
Guitar chords and tabs
The companion to the lyrics archive: chords and tabs for Sinhala songs, for the people actually trying to play them rather than just read along.
19 varieties, caffeine data, and a joke
Half the fun of this one is the joke and the other half is real. It catalogues every Dr Pepper variety with the caffeine and nutrition numbers, and takes the caffeine-dependence part more seriously than the name suggests.
Code paste for WordPress developers
A paste bin that knows what it is looking at. PHP and JavaScript syntax highlighting, and every WordPress function and hook in your snippet auto-linked to its documentation.
Single-purpose encoder
Paste text in, get Base64 out. Nothing else on the page, no account, and no step between arriving and having the answer.
Single-purpose decoder
The other direction, on its own domain rather than as a tab on the encoder, because that is how people actually search for it.
TypeScript, JavaScript, Node.js, PHP, Python, Bash, SQL, C#
MySQL, MariaDB, PostgreSQL, Elasticsearch, Redis, ClickHouse
AWS, Google Cloud, Cloudflare, Hetzner, Docker, Kubernetes, Terraform, Coolify
Linux (RHEL, Debian, Ubuntu), systemd, Nginx, DNS and DNSSEC, SPF/DKIM/DMARC, BGP
React, Next.js, WordPress and Advanced Custom Fields at scale
LLM applications, RAG, agents, prompt engineering, evaluation harnesses