Full-Stack Engineer

Sanjay Kapilesh

I enjoy building systems end to end from React frontends to distributed backends.

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01 · Selected work

Featured projects

Systems built end to end — designed, shipped, measured, and written up.

In progress

Distributed Rate Limiter

Token-bucket rate limiting as a horizontally scalable service — Redis-backed, atomic via Lua, exposed as Express middleware and a standalone sidecar.

node typescript redis aws

Case study

Postgres-Backed Job Queue

A case study in building a reliable job queue on plain Postgres — SKIP LOCKED claiming, visibility timeouts, retries with backoff, and a dead-letter table.

node typescript postgresql docker

Shipped

URL Shortener with Analytics

A link shortener that treats every redirect as an event — sub-10ms redirects on the hot path, click analytics rolled up asynchronously into a React dashboard.

node typescript postgresql react docker

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02 · Toolbox

Tech I reach for

The day-to-day stack — frontend to data warehouse.

TypeScript
React
Node.js
Express
MongoDB
PostgreSQL
AWS
Snowflake
Redis
Docker

03 · About

The short version

I'm Sanjay, a full-stack engineer who likes owning the whole problem — the React frontend, the API behind it, and the infrastructure underneath. Most of my work lives somewhere between a browser and a data warehouse.

Lately I've been deep in distributed systems: rate limiters, job queues, and the trade-offs you only discover by building them. The projects on this site come out of that work, each with an architecture write-up on the blog.