Nilanjan Mandal

Thoughtful code. Useful things.
Web, mobile, and the systems in between.

Full stack engineer · India

Hey, I’m Nilanjan.

Thoughtful code.
Useful things.

I build web and mobile products that make complex work feel simple. From the first interaction to the systems behind it.

Experience at 23 Ventures and StepOut.

A little human
behind the code.
NM / 26
Nilanjan Mandal
West Bengal, IndiaWeb · Mobile · Systems
Building across web & mobile.

01 / Selected work

Built to solve
something real.

A few projects where thoughtful interfaces meet the engineering underneath.

Built on my own timeMore on GitHub
HushMark application interface

Personal information redaction

HushMark

Find sensitive information in text, documents, and audio. Review each match, redact selected details, and export protected text or beeped audio.

Next.jsFastAPIPresidioOpenAI
Flixr application interface

YouTube workflow automation

Flixr

From an editor’s upload to an admin’s approval to a published video. A simpler workflow for content teams.

Next.jsExpressPostgreSQLRedis
Kaigi application interface

Live collaboration

Kaigi

A space to talk, sketch, and work together, with peer to peer video, live messaging, and a shared whiteboard.

Next.jsFastifyWebRTCSocket.IO

The way I build

02 / The journey

A little context.
A lot of building.

Working across product interfaces, mobile experiences, and the infrastructure that makes them reliable.

The full résumé
23 Ventures logoSep 2024 to Oct 2026

23 Ventures

Member of Technical Staff · Remote, India

Built web and mobile products across Social Change, TrainingObjects, and CryptoApe / FutureApe.

  • Shared React Native / Expo experiences across four branded applications.
  • Annotation, dataset preparation, and model training interfaces.
  • Live trading competition workflows, portfolio rebalancing, and live rank notifications.
React & Next.jsReact NativeAWS
StepOut logoNov 2021 to May 2024

StepOut

Software Engineering Intern · Remote, India

Improved upload, payment, analytics, and mobile workflows for a sports performance analysis platform.

  • Multipart video uploads and AWS Lambda / Playwright document workflows.
  • Razorpay payments, Mixpanel and GA4 instrumentation, multilingual support, and wireless app updates.
React NativeNode.jsAWS Lambda

03 / Behind the code

Curious by default.
Engineer by craft.

I’m Nilanjan, a full stack engineer based in West Bengal, India. I like getting into the details: how an upload recovers after a dropped connection, how a drawing tool handles a zoom, how four apps can share one solid foundation.

My work spans the interface and the systems behind it. I care about clear interactions, maintainable code, and making complicated things easier to use.

B.Tech in Information Technology

RCC Institute of Information Technology, Kolkata

Class of 2024 · CGPA 8.37

My everyday toolkit

Web & interfaces

React, Next.js, TypeScript, Tailwind CSS, TanStack Query, Zustand

Mobile experiences

React Native, Expo, Expo EAS, Fastlane

Behind the scenes

Node.js, Express, PostgreSQL, Redis, REST APIs, WebSockets, FastAPI

Shipping & infrastructure

AWS S3, Lambda, EC2, Amplify, Docker, GitHub Actions, Turborepo, Bun

Also comfortable with JavaScript, SQL, Python & Go.

04 / What’s next?

Have something
good in mind?

A product to build, a tricky problem, or just a hello.
I’d love to hear from you.

nilanjanmandal15@gmail.com