I build the parts of the web that have to keep working when nobody is watching.

Double-entry bookkeeping API for small Indian businesses. Every write lands as an immutable journal entry, so balances are derived rather than stored and can be recomputed from scratch at any point in history.

• Handles roughly 40,000 journal entries a day across 1,200 books
• Nightly reconciliation went from 9 minutes to 40 seconds after reshaping the aggregation pipeline
• Zero balance-drift incidents since the ledger became append-only

• Node.js
• Express
• MongoDB
• Redis
• React
• TypeScript

• Case study
• ledgerloop.in ↗

Stock and expiry tracking for independent pharmacies. Counters in small-town India lose connectivity constantly, so the whole app is offline-first: writes queue locally and reconcile against the server when the link returns.

• Running in 63 stores; median session happens on a 2G connection
• Conflict resolution built on per-document vector clocks, not last-write-wins
• Cut expired-stock write-offs by about a third in the first year of use

• React
• IndexedDB
• Node.js
• MongoDB
• Workbox

• How the sync works

A migration runner for MongoDB that treats rollbacks as a first-class case. Migrations are plain TypeScript files with up and down halves, run inside a transaction where the deployment supports one.

• About 4,000 downloads a week on npm
• Dry-run mode prints the exact write operations before anything touches the database

• TypeScript
• MongoDB
• Node.js

• GitHub ↗
• npm ↗

A small service that watches a set of RSS feeds and emails a digest only when something genuinely changes, using text similarity to suppress the churn of reworded headlines.

• Filters out roughly 70% of items as near-duplicates of something already sent
• Runs on a single 256MB instance for about a dollar a month

• Node.js
• SQLite
• Astro

• GitHub ↗

Senior full-stack engineer

• Own the ledger and settlement services: Node, Express, MongoDB, roughly 300 requests a second at peak.
• Replaced a polling worker with change streams and an idempotency layer, removing a class of duplicate-payout bugs.
• Mentor two junior engineers and run the weekly design review.

Full-stack engineer

• Built the React front end and Node API for a logistics dashboard tracking 4,000 vehicles in near real time.
• Introduced TypeScript across four services and cut production type errors to near zero over two quarters.
• Took the deploy pipeline from a 25-minute manual release to a 6-minute automated one.

Freelance web developer

• Shipped eleven client projects, mostly MERN applications for small teams and early-stage products.
• Learned the hard way that hosting, backups and handover documentation are part of the job.

React State from first principles

Learn react useState hook from first principles. Use states with confidence.

What MongoDB change streams actually cost you

Change streams removed a polling loop and a whole class of duplicate-payout bugs. They also introduced three failure modes I had not budgeted for.

Stop putting business logic in Express middleware

Middleware that mutates the request object reads like dependency injection and behaves like a global variable. Here is the refactor that finally stuck.