Vaibhav.— Portfolio / 2026 · v01
Open to roles · '27

VaibhavDangaich

I build with LLMs, knowledge graphs, and a worrying amount of caffeine. Just wrapped an SDE internship at 123 of AI — cohort learning, payments and a recommendation engine on Azure. Before that: real-time pipelines for a defense-intelligence project, and a first-authored paper on ontology-guided knowledge graph extraction.

BIT MesraAIML, B.Tech
2023 — 2027
123 of AISDE Intern
May — Jul 2026
Jharkhand → ∞IST, GMT+5:30
chai-powered
nodes / edges— / —
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I'm Vaibhav.

I'm a final-year AI & ML student at BIT Mesra. Most recently an SDE intern at 123 of AI, shipping a cohort-learning platform, a Razorpay monetization stack and an embeddings-based recommendation engine on Azure. Before that, Kafka pipelines and Neo4j graphs for a government intelligence project at Konect U.

By night, I either ship side projects, grind LeetCode, or argue with myself about which font to use on my portfolio. (See: above.)

Things I think about a lot: how to make LLMs actually useful, how knowledge graphs can replace half the SQL we write, and what a truly cognitive AI coding agent looks like — one with persistent memory and a critic loop, not a stateless chatbot. (I built one. It's below.)

I like clean APIs, dense code, and a well-placed em dash.

§ 02 — Where I've been

The résumé, abbreviated.

May 2026 — Jul 2026latest

SDE Intern

123 of AI
  • Built cohort-based learning on a Next.js / React + Node.js / TypeScript platform on Azure — enrollment, scheduling, streaks, XP leaderboards, certificates and REST APIs, plus 10 idempotent scripts migrating the course catalog.
  • Owned the monetization stack — Razorpay orders, subscriptions and webhooks, an idempotent entitlements service, and a ledger-based credits system auto-granting across 3 tiers, with every offer priced server-side to block client-side tampering.
  • Engineered a personalized recommendation engine using vector embeddings and semantic search (Azure OpenAI) targeting each learner's weak concepts; shipped the DRM course player and audited Amplitude telemetry across 132 routes.
Feb 2026 — May 2026

AI Intern

Konect U
  • Designed secure, real-time data ingestion pipelines using Apache NiFi and Apache Kafka, routing 4 document formats (PDF, spreadsheet, Office, image) for a defense-oriented government intelligence project.
  • Developed LangChain-powered LLM workflows and Neo4j knowledge graphs to extract entities and map ontologies, lifting entity search recall from 70% to 95% with zero false merges.
Oct 2025 — Dec 2025LOR earned

Full Stack Intern

Konect U
  • Delivered full-stack apps in an agile team, translating client requirements into technical specs and integrating third-party APIs.
§ 03 — On the record

A paper, first-authored.

Preprint · arXiv:2607.28662 [cs.AI]Jul 2026

An Ontology-Guided, Deduplication-Aware Extraction Layer for Knowledge Graph Construction from Heterogeneous Documents

Vaibhav Dangaich, Kevin Lewis, Kundeshwar Pundalik

Ontology-guided two-pass extraction with a locally hosted Qwen3.5-9B over a Kafka document stream. Live ontology-slice retrieval cut catalog overhead by ~94%, and a six-algorithm deduplication + embedding-resolution pipeline raised search recall from 70% to 95% — with zero false merges.

§ 04 — Things I've built

Side quests.

* pick them up.
grab a card, fling it, watch it spring back. yes, that's the joke.
Aug 2026#01

Visual Activity Agent

A privacy-conscious Chrome MV3 extension that watches navigation, clicks and focus, ships downscaled screenshots to a Node ingest API, and lets Gemini vision summarize the session server-side. The browser never runs a model, and perceptual-hash dedup drops near-identical frames — so a static page costs almost no image data at all.
Chrome MV3Node.jsExpressSupabasePostgresGemini Vision
dHash dedup · single-digit KB frames · idle-aware capture
Jun — Jul 2026#02

FOIAtlas

An investigative GraphRAG tool that turns released FOIA/RTI records into a queryable knowledge graph — a 6-stage pipeline (parse → extract → resolve → embed → write) with schema-constrained Gemini extraction into an embedded Kùzu graph. Every redaction is a first-class node carrying its legal exemption code, so concealed spans become leads instead of dead ends.
Next.js 16TypeScriptKùzuGeminiLangGraphCytoscape
Semantic-search chat · LangGraph ReAct agent · Cytoscape explorer
Feb 2026 — presentnpm#03

mnex

A cognitive-architecture AI coding agent that lives in your terminal. Stateful LangGraph planner → executor → critic loop for self-correcting multi-step reasoning over your codebase, a 5-tier persistent memory on SQLite WAL, and a local-first router (Ollama → OpenAI/Gemini). Treats the agent as a cognitive system, not a chatbot.
Node.jsLangGraphLangChainSQLiteOllamaGemini APICLInpm
sub-50ms recall · −40% cloud inference · 3.5k lines, zero external infra
May — Jun 2025#04

PushMuse

A CLI git assistant that writes your commit messages so you don't have to. Reads your diff, calls Gemini, hands you a sensible feat(api):… line. Filters binary diffs to keep tokens lean.
Node.jsNext.jsExpressGemini APICLIRender
−90% manual typing · 30–50% token savings
Mar — Apr 2025#05

AI Resume Builder

Full-stack app that builds a polished resume in a fraction of the time. React 19, Strapi CMS, Neon Postgres, Clerk auth, and a real-time editor in shadcn + Tailwind v4. AI does the heavy lifting on content suggestions; you stay in the driver's seat.
React 19Tailwind v4StrapiNeonClerkshadcn
75% faster resume creation · −15 min average
§ 05 — Stack

Tools of the trade.

Languages α

  • C / C++
  • Python
  • JavaScript
  • TypeScript
  • SQL
  • HTML / CSS

Frameworks β

  • LangChain · LangGraph
  • React · Next.js
  • Node.js · Express
  • FastAPI
  • Tailwind
  • Three.js
  • scikit-learn

Tools γ

  • Git · GitHub
  • Docker · Azure
  • Apache Kafka
  • Apache NiFi
  • Neo4j · Kùzu
  • MongoDB · SQLite
  • Jest · Postman
  • Vector DBs

Curious about δ

  • Generative AI (LLMs)
  • RAG & GraphRAG
  • Knowledge Graphs
  • Machine Learning
  • Web Dev
  • Comp. Programming

CS fundamentals ε

  • DBMS
  • Operating Systems
  • OOP
  • Data Structures & Algorithms
§ 06 — Education

Schools attended.

Sep 2023 — Sep 2027

Birla Institute of Technology, Mesra

B.Tech · Artificial Intelligence & Machine Learning

8.4CGPA
2022

Subhash Public School

CBSE · Class XII · Jharkhand

89%Class XII
2020

BNS DAV Public School

CBSE · Class X · Jharkhand

93.2%Class X
§ 07 — A few wins

Receipts.

/ 01
400+
DSA problems solved

Across LeetCode, Codeforces, GeeksforGeeks and CodeStudio. Yes, I have a spreadsheet. No, I won't show it to you.

/ 02
Top 5
IEEE CTF · BIT Mesra · 200+ teams

Secured a top-5 finish at the IEEE Capture-The-Flag — solving real-world security challenges in a team of four, mostly on coffee and dread.

§ 08 — Get in touch

Let's build
something.

Emailvaibhavdangaich@gmail.comPhone+91 77177 85632LinkedIn/in/vaibhavdangaich ↗GitHub@VaibhavDangaich ↗LeetCode/u/vaibhavdangaich ↗Back to top↑ rewind
click · break the light