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Piyush Prajapati — full-stack software engineer working across front end, back end and ML. From REST APIs serving a thousand requests a day to a graph-neural ensemble that flags mule accounts.

See the work ↓Download résumé ↓

Layer 04 / 07

API

Node.js · Express · FastAPI · JDBC

API requests served daily
1,000+API requests served daily
concurrent live sessions
500+concurrent live sessions
response latency, tuned
−35%response latency, tuned
hackathons, 3+ national
10+hackathons, 3+ national
  • React 19
  • TypeScript
  • Node.js
  • Kotlin
  • Java 21
  • FastAPI
  • PostgreSQL
  • MongoDB
  • WebSockets
  • Docker
  • AWS
  • XGBoost
  • GNN
  • LLMs
  • LLMs
  • GNN
  • XGBoost
  • AWS
  • Docker
  • WebSockets
  • MongoDB
  • PostgreSQL
  • FastAPI
  • Java 21
  • Kotlin
  • Node.js
  • TypeScript
  • React 19

(01)  Selected work

Six things I shipped.

Each one started as a problem, not a tutorial. Open any row for the full case study.

(01)Fraud & threat intelligence2026

MuleRadar — a GNN + XGBoost + LSTM ensemble with SHAP explainability that flags mule accounts — unified with DRISHTI's APK threat intelligence, code-DNA fingerprinting and automated CERT-In takedowns. Built for PSB CyberShield (Bank of India + IIT Hyderabad).

  • GNN
  • XGBoost
  • LSTM
  • SHAP
  • Python
3-model

stacking ensemble

Source ↗ for KAVACH on GitHubCase study →

(02)Systems · rate limiting2026In development

A concurrency-aware, pluggable rate limiter: Fixed Window, Sliding Window and Token Bucket behind a common interface, with producer-consumer audit logging, a load-test runner and a Clock abstraction for deterministic tests.

  • Java 21
  • JDBC
  • PostgreSQL
  • JUnit 5
  • Maven
3

algorithms, one interface

Case study →

(03)AI interview platform2024

Adaptive questioning over Socket.io and Gemini-powered analytics that cut candidate prep time by 45%.

  • MongoDB
  • Express
  • React
  • Node.js
  • Gemini API
  • Socket.io
500+

concurrent sessions

Source ↗ for Interview.io on GitHubCase study →

(04)AI-assisted code editor2025

Real-time completions that lifted developer productivity by 30%, plus WebSocket-based LLM code analysis.

  • React
  • Node.js
  • Express
  • MongoDB
  • Gemini API
  • WebSockets
−50%

debugging cycles

Case study →

(05)Autonomous AI agent2025

An agent with custodial wallets, IPFS storage and an AES-256 emergency SOS that completes transfers in under three seconds.

  • React 19
  • TypeScript
  • Gemini 2.5 Flash
  • Fraxtal L2
  • IPFS
  • Firebase
Top 10

of 300+ teams

Source ↗ for Athena on GitHubCase study →

(06)Behavioural risk ML2026

A model that detects emotional trading behaviour, and an automated pipeline delivering tailored risk analyses to 200+ active traders.

  • FastAPI
  • Scikit-learn
  • Python
87%

detection accuracy

Source ↗ for Sentinel on GitHubCase study →

(02)  Services

Hire me to build it.

I take on freelance work alongside my degree — a small number of projects, done properly, with you in the loop the whole way. Pick one to start a message.

How it goes

  1. 01

    Scope

    One call. I write back what we're building and what we're not.

  2. 02

    Build

    Short iterations you can click through, not status reports.

  3. 03

    Ship

    Deployed, tested, documented and handed over.

  4. 04

    Stay

    Fixes and next features after launch.

Have a brief, a deadline, or just a rough idea?

(03)  Experience

Where I've done it.

  1. Jun — Aug 2026

    Software Development Engineer Intern

    360Ghar · Remote

    • Built scalable RESTful APIs handling 1,000+ daily requests and tuned prompt engineering to cut response latency by 35%.
    • Designed LLM-powered natural-language property discovery in React and Node.js, reducing user search time by 40%.

  2. 2026

    Freelance Full-Stack Developer

    Client projects

    • Building BN Cabs — a client ride-hailing platform of five Android apps (Rider, Driver, Operator, Management, Partner) in native Kotlin.
    • Built and iterated a WordPress website for Rizak Foods India Pvt. Ltd., a Punjab dairy company, working directly with the client.

  3. Jun 2026 — Now

    AWS Student Builder Group Leader

    Chitkara University

    • Lead hands-on workshops on cloud computing, generative AI and AWS services; manage a cross-functional student team and coordinate with faculty and AWS stakeholders.

  4. 2024 — 2028

    B.E. Computer Science Engineering

    Chitkara University, Punjab

    • CGPA 8.8 / 10. Graduating June 2028.

(04)  About

The person behind the commits.

Piyush PrajapatiPunjab, India

I’m a computer science undergraduate who would rather ship a rough thing, watch it break under real users, and rebuild it right — than polish a demo nobody uses.

That has meant production APIs during an SDE internship, a five-app ride-hailing platform for a paying client, and a fraud-detection ensemble built for a banking hackathon. I work across the whole stack and I’m comfortable talking to the people the software is for.

Languages
Java · Python · JavaScript · TypeScript · C++ · SQL · Kotlin
Front end
React 19 · HTML · CSS · Tailwind CSS · WebSockets / Socket.io
Back end
Node.js · Express · FastAPI · REST · JDBC · MySQL / PostgreSQL · MongoDB · Firebase
Scale & quality
Java concurrency · rate limiting · load testing · JUnit 5 · Docker · CI/CD · Git · AWS
Risk & ML
Fraud detection · XGBoost · GNN · LSTM · SHAP · Scikit-learn · Pandas · LLM integration

Recognition

  • Top 10

    of 300+ teams

    GenIgnite hackathon, NIT Goa

  • Finalist

    of 270+ teams

    HackIndia Web3 Hackathon, regional round

  • 10+

    hackathons

    3+ national-level recognitions

(05)  Certifications

Proof I keep learning.

Hover a credential to pull it to the front of the deck. Click to inspect the real certificate.
08Credentials
07Issuers
2024–26And counting
Credential01 / 08

JPMorganChase · Aug 2025

Software Engineering Job Simulation

  8. 08Introduction to Generative AIGoogleAI & Cloud· Listed on résumé—

(06)  Contact — Open to SWE internships & freelance projects

Got something to build, break or rebuild?

Write directly

contact.piyushprajapati@gmail.com
Based in
Punjab, India
Local time (IST)
--:--
Works with
Teams and clients anywhere, remotely.
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