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Building intelligent apps & the backends behind them
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Building intelligent apps & the backends behind them

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Aryangupta-05/Readme.md

👨‍💻 Aryan Gupta

Applied AI · Backend Engineering · Full-Stack Development

Building useful AI applications and dependable backend systems.

Resume Portfolio LinkedIn Email LeetCode CodeChef Codeforces


🎓 BIT Mesra · B.Tech, Electronics & Communication Engineering · 2023–2027
📚 CGPA: 8.49/10 · 💼 Former Software Developer Intern, QOE Technologies and Services
🎯 Open to AI engineering, AI/ML, backend, and full-stack internships


I build AI applications, backend APIs, and systems projects with Python, TypeScript, JavaScript, and C++. My work spans document retrieval, social applications, and C++ packet inspection.

🌍 Merged open-source contributions

Project Fix Review
gocron Daily/weekly scheduling across midnight daylight-saving transitions. Merged #966
w3lib Base URL extraction after script and noscript closing tags. Merged #379
go-billy Correct errors when reading a regular file as a directory. Merged #247

Each fix includes regression coverage. Browse my pull requests →


🚀 Featured engineering projects

Python · FastAPI · PostgreSQL · Redis · FAISS · LangChain · React · Docker

  • Turns documents into a searchable knowledge base using SentenceTransformer embeddings and FAISS retrieval.
  • Supports session-aware Q&A, streamed answers, follow-up suggestions, query history, and analytics.
  • Added Redis rate limiting and one-hour caching; measured repeated-query latency improved from 2.5s to under 15ms.

Source code · Video walkthrough


React · Node.js · Express · MongoDB · Gemini · JWT · AWS S3

  • Built authenticated social features, bookmarks, search, and a feed ranked by a background worker.
  • Integrated Gemini draft improvement with a suggestion preview: authors choose whether to apply an edit before publishing. API credentials stay on the server.
  • Added regression tests covering draft validation, provider errors/timeouts, truncated output, response shape, and literal/hashtag search.
  • Integrated S3 media storage, TanStack Query caching, and EC2/PM2 deployment tooling.

Source code · Live demo · Test coverage

The hosted app may take about a minute to load.


C++17 · PCAP · Multithreading · TLS SNI · Flow Tracking · Group project

  • Co-engineered an offline packet inspection engine with protocol parsing and thread-safe queues; project measurements reached 10,000+ packets/sec on a single core.
  • Co-built TLS SNI, HTTP Host, and DNS classification, plus bidirectional five-tuple flow tracking.
  • Co-implemented filtering by IP, domain, application, and port, with filtered PCAP output.

Source code & run instructions


💼 Experience

Software Developer Intern · QOE Technologies and Services
May–June 2026 · Remote

  • Built full-stack booking features for Soul Consciousness Lab with React, Node.js, Express, and MongoDB; reduced duplicate bookings by 90% in controlled repeated-click tests.
  • Reduced measured page load time from 3.8s to 2.4s (37%) through lazy loading, fewer redundant requests, and optimized React re-renders.

🛠️ Technical skills

LangChain LangGraph GraphRAG RAG Pipelines Python C++ TypeScript JavaScript FastAPI Node.js React PostgreSQL MongoDB Redis Docker AWS

Explore my full toolkit
Area Technologies
Languages C++, Python, TypeScript, JavaScript, SQL
AI & ML Generative AI, machine learning, deep learning, LLMs, RAG Pipelines, LangChain, LangGraph, GraphRAG, SentenceTransformers, FAISS, vector search
Backend FastAPI, Node.js, Express, REST APIs, JWT, SQLAlchemy, Mongoose
Data PostgreSQL, MySQL, MongoDB, Redis
Frontend React, TanStack React Query
Cloud & tooling AWS EC2/S3, Docker, GitHub Actions, PM2, Vercel, Render, Git, Linux, Postman
Foundations Data structures and algorithms, OOP, operating systems, DBMS, computer networks, system design

🏆 Problem solving & achievements

750+ DSA problems solved · LeetCode Knight, max 1943 · CodeChef 3-star, max 1639

View contest results, milestones, and leadership
Platform / milestone Achievement
🟠 LeetCode Knight · Max 1943 · Top 3.5% at the recorded milestone
🏅 LeetCode contests Global Rank 285 — Weekly 502 · Rank 1,488 — Biweekly 184
🟤 CodeChef 3-star · Max 1639
🔵 Codeforces Pupil · Recorded rating 1246
🧩 Problem solving 750+ DSA problems across LeetCode, Codeforces, and CodeChef
💻 Google The Big Code 2026 Round 2 qualifier · Top 1,500
🎓 JEE Main 2023 Top 3% nationwide
⚽ Leadership Captain, BIT Mesra Football Team · 2025–present

Ratings and problem counts are recorded milestones from my resume.


🗂️ All projects

The featured projects above are a starting point. Explore the rest of my public projects and experiments below.

Explore all 12 projects & experiments
Project What it's about
DocuMind RAG document assistant and streamed Q&A
Tweetie Social platform with a Gemini writing assistant
DPI Engine Group project: offline C++ packet inspection
Rice Leaf Disease Detection Computer vision and disease classification
MoneyMapper.ai Personal finance and receipt scanning
Windward Historical wind forecast analysis
CreditSea XML credit-report processing and dashboard
Listing / ROAM-AN Rental listings, authentication, and reviews
Portfolio Website My work, experience, and engineering decisions
MacBook Landing Page Product presentation and frontend experiment
Valentine's Week Interactive web experiment
Food Sharing Site Early project repository

Learning & practice: System design notes · Interview questions

Browse All Repositories


🤝 Let's build something useful.

Have an AI problem to solve, a backend to build, or an opportunity to learn with your team? I'd love to hear about it.

Open to AI engineering, AI/ML, backend, and full-stack internships.

Resume Portfolio LinkedIn Email


When I'm not building, I'm solving.

LeetCode CodeChef Codeforces

Pinned Loading

  1. document-qa-rag-Documind document-qa-rag-Documind Public

    End-to-end RAG document assistant with FastAPI, PostgreSQL, FAISS vector search, Redis caching & React

    JavaScript

  2. Tweetie Tweetie Public

    Full-stack social media platform with MERN, JWT auth in HTTP-only cookies, time-decay feed ranking, node-cron worker & AWS S3

    JavaScript

  3. Packet_Analyser Packet_Analyser Public

    Forked from Anishhar03/Packet_Analyser

    Multithreaded C++17 Deep Packet Inspection (DPI) engine with PCAP parsing, TLS SNI & HTTP/DNS classification, 5-tuple flow tracking & rule filtering

    C++