Sagnik Bhowmick

I build backend systems, distributed architectures, and developer tools in Go. I'm passionate about writing clean, scalable code and sharing what I learn through my blog.


Featured Projects

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WorkWatch

A macOS utility that reads your attendance email from Apple Mail, calculates your remaining work hours, and automatically puts your Mac to sleep when the day is done. Supports a live terminal countdown, background daemon with native notifications, and a color-coded monthly attendance log.

Python AppleScript macOS

Referall

A job referral platform built with Go, Redis, SQLite, gRPC, and Docker. It allows users to refer friends for job opportunities, track referrals, and manage their referral network.

Go Redis SQLite gRPC Docker

pixelQR

pixelQR: QR Code Generation and Management.

Go Makefile MySQL Docker

rideshare

Ride Sharing Backend Mock for Machine Coding: Simplifin

Go gRPC Docker

Recent Posts

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PostgreSQL Performance Tuning: From Slow Queries to Sub-Millisecond Responses

Practical techniques for diagnosing and fixing slow PostgreSQL queries, covering EXPLAIN plans, indexing strategies, query rewrites, and configuration tuning.

Understanding Container Networking from the Ground Up

A detailed look at how container networking actually works under the hood — network namespaces, veth pairs, bridges, iptables, and how Docker stitches them together.

Building CLI Tools in Go with Cobra

A practical guide to building production-quality CLI tools in Go using the Cobra library, covering project structure, flags, configuration, and testing.


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