selected_work

Real products, from problem to shipped.

Anonymized walk-throughs of work I've shipped: the problem, what I actually engineered, and the result it produced. Outcome metrics show up here only once they're confirmed with the client.

DATA MIGRATION
Checkpointed CRM migration engine
Rails 8 · GoodJob · Postgres · a metered third-party API
The engine that moves a customer's entire CRM — 400,000 contacts, companies, deals, leads, notes and activities, plus 90,000 emails — out of another vendor's metered API and into a multi-tenant Rails product, once each, with a ledger that can say for every source row what happened to it. Built, broken, measured and made four times faster over three weeks; written up as a six-part engineering series.
Ruby on Rails 8GoodJobPostgreSQLpg_trgmNext.jsTypeScriptAWS
Read case study400k+ records migrated, once each
DEV TOOLS
Prompt Vault
Free AI prompt manager (Chrome extension)
A free Chrome extension that saves, organizes, and one-click inserts AI prompts into ChatGPT, Claude, Gemini and more. I designed and shipped the whole thing — serverless, private, and reliable across nine different AI chat sites.
JavaScriptChrome MV3Vitechrome.storage.sync
Read case study9 supported AI chat sites
ON-DEVICE AI
Textquill
On-device OCR + offline grammar checker (Chrome extension)
A free Chrome extension that pulls editable text out of any image, screenshot, PDF, or screen region — then proofreads, translates, and rewrites it, all without a server. V2 turned an OCR tool into a full local text pipeline: four WebAssembly models (OCR, grammar, translation, Chrome's built-in AI) running on the user's own hardware, 38 languages, and an always-on grammar checker that never uploads a draft. Lives at textquill.app.
JavaScriptChrome MV3WebAssemblyonnxruntime-webChrome built-in AI
Read case study38 OCR languages
SPEECH AI
Self-hosted speech-to-text
Speech recognition engine for a low-resource language
Voice messages were reaching an AI assistant as an empty placeholder, because no affordable speech API handled the language well. I fine-tuned an open-source recognition model on a free GPU and shipped it as a self-hosted API on hardware that was already paid for: word error rate 0.808 to 0.379, and the wrong-alphabet failure eliminated.
PythonPyTorchONNX RuntimeFastAPIDocker
Read case study0.808 → 0.379 word error rate, same held-out set
TELEPHONY
KrispCall
Cloud telephony SaaS for high-growth teams
A cloud phone system where the call has to connect every time. The work: a real-time React/GraphQL interface over a WebRTC voice stack that stays responsive while live calls, queues, and presence update underneath it.
ReactTypeScriptGraphQLWebRTCGCP
Read case study100+ countries · live numbers
AI / MEDIA
SparkTales
AI storytelling SaaS for parents & educators
An AI product that turns a prompt into an illustrated, age-appropriate story. I built the Next.js app and the LLM generation pipeline behind it, engineered for safe, consistent output and a generation wait that reads as intentional rather than broken.
Next.jsTypeScriptLLMsNodeGCP
Read case studyVertex AI Gemini generation pipeline
LOGISTICS
Keelspot
Coastal-shipping marketplace platform
A platform connecting cargo owners with coastal-shipping capacity. I built the Next.js marketplace, including the matching, quoting, and booking flows that turn a fragmented, spreadsheet-driven process into something operators actually use.
Next.jsTypeScriptTailwindNode
Read case studyWorld-1st short-sea marketplace
PLATFORM
Webhook flood controls
Ingest hardening for a multi-tenant CRM (client engagement)
A partner platform's replay loop delivered 487,195 events into a CRM's webhook endpoint in eleven hours and pinned the box at 99% CPU. I traced it a week after the fact through a session-manager shell, found that all three existing protections were structurally incapable of catching it, and built the ingest budget that closes the class of failure rather than the instance.
Ruby on RailsPostgreSQLGoodJobAWS SSMDocker
Read case study487,195 events in 11 hours
OPEN SOURCE
granthdb
SQLite in the browser, behind a Dexie-compatible API
A 14-package open-source library that runs SQLite compiled to WebAssembly inside the browser tab, stored in OPFS, behind the API Dexie users already know. Real indexes and a real query planner instead of cursor walking, off the main thread, with one elected writer so multiple tabs cannot corrupt the file.
TypeScriptSQLite/WASMOPFSWeb WorkersWeb Locks
Read case study92% Dexie API parity, audited in CI

work_with_me

Have something to build, scale, or fix?

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Real products, from problem to shipped.

Checkpointed CRM migration engine

Prompt Vault

Textquill

Self-hosted speech-to-text

KrispCall

SparkTales

Keelspot

Webhook flood controls

granthdb

Have something to build, scale, or fix?