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Portrait of Harsh Kumar Singh

Open to Backend & Full Stack roles · Delhi, India

Building reliable backends, engineering real-time experiences.

I build the server side of real-time products in Python and FastAPI, and I like working across the stack: WebRTC platforms, Android apps, and encrypted peer-to-peer tools.

01About

A bit about me

I'm Harsh, a backend engineer from Delhi. Most of what I've built lives behind the screen: the real-time messaging, the login flow, the database that holds it together.

For over three years I've worked on backend services in Python and FastAPI, from WebSocket and WebRTC pipelines to JWT and OAuth sessions and PostgreSQL schema design. I also enjoy the security side of things, which is why HexaWave and SwiftDrop, my encrypted peer-to-peer projects, exist.

I don't stay in one layer. I've built Next.js frontends, native Android apps in Kotlin, and deployed containers to AWS EC2, Render and Vercel. At EtharaAI I spent an internship evaluating LLM responses, which gave me a close look at how AI quality pipelines work.

I like Linux, small tools that do one thing well, and shipping software people can actually use.

Studying
B.Tech, Computer Science Engineering (expected 2027)
Working since
December 2022, part-time, on backend and full-stack products
Startup track
Selected for pre-incubation at DTU-IIF
Daily setup
Arch Linux (i3, KDE Plasma) and Ubuntu 24.04 LTS
Based in
Delhi, India
02Skills

What I work with

Grouped as on my resume. Tap an underlined technology to see which of my projects use it.

Programming Languages

Languages used across backend, mobile, systems and scripting work.

  • Java
  • C
  • C++
  • JavaScript

Backend & Real-Time

APIs and real-time communication.

  • Express.js

Frontend

Responsive interfaces.

  • HTML
  • CSS
  • Tailwind CSS
  • JavaScript

Databases

Relational and managed data stores.

  • MySQL

Authentication & Security

Securing accounts, sessions and APIs.

Cloud & DevOps

Containerized deployment and delivery.

  • Git
  • GitHub
  • CI/CD deployment workflows

Operating Systems

Daily development environments.

  • Arch Linux
  • i3
  • KDE Plasma
  • Ubuntu 24.04 LTS
  • Windows

03Projects

Things I've built

Six projects from my resume. Open one for the problem, my role, the architecture and the engineering details. Everything else is on my GitHub.

6 projects shown

04Experience

Where I've worked

Dates are as listed on my resume. Kridavista and SaiMadad were part-time, so several roles overlap.

  1. Aug 2026 to Aug 2026

  2. Feb 2026 to Jul 2026

  3. Aug 2024 to Oct 2025

  4. Dec 2022 to Jul 2026

    • Developed scalable backend services for a real-time communication and collaboration platform using Python, FastAPI and a WebSocket-based architecture, supporting concurrent user sessions.
    • Designed secure authentication and session-management systems using JWT and OAuth-based workflows.
    • Engineered low-latency media and messaging pipelines supporting concurrent user communication and streaming.
    • Managed cloud deployments and containerized services across Docker, AWS EC2, Vercel and Render.
    • Optimized PostgreSQL database structures and backend APIs for scalability, response time and resource efficiency.

    Python · FastAPI · WebSockets · PostgreSQL · Docker · AWS EC2

05Background

Learning & recognition

Education

  • 2023 to 2027 (expected)

    B.Tech in Computer Science Engineering

    Guru Gobind Singh Indraprastha University, Delhi, India

  • Completed 2023

    Senior Secondary School (Class 11 and 12)

    Government Sarvodaya Bal Vidyalaya, Delhi, India

  • Completed 2021

    Secondary School (Class 10)

    Joseph and Mary Public School, Delhi, India

Certifications

  • Google Cybersecurity Professional Certificate

    Coursera

  • Web Development Masterclass

    Udemy

  • Java Programming Certificate

  • Mid-Level JavaScript Developer

    Certificates.dev

Achievements

  • Felicitated and awarded at BharatPreneurs 2026

  • Selected for pre-incubation at DTU-IIF

  • First place, internal Smart India Hackathon 2025

    JIMS EMTC

  • Ninth place, internal Smart India Hackathon 2024

    JIMS EMTC

  • Runner-up, VCT Hashtag Competition

    Team WARDEN

  • IIC Activity Award

    National Startup Day

06Open source

On GitHub

Every public repository from both of my GitHub accounts, pulled live from the GitHub API. Filter, search and sort below.

07Contact

Let's talk

I am open to backend, software engineering and full-stack roles, and to interesting collaborations. Pick a topic below and I will get back to you.

LinkedIn · engi-harsh GitHub · harshuopjs GitHub · harshuopjs-software
Delhi, India

You will get an automatic confirmation email as soon as your message is sent. I usually reply personally within a few days.

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