AI Application & Full Stack Architecture

 

Karachi, PK/Available for Global Remote & Relocation

I build production-grade software end to end — RAG assistants, fintech double-entry ledgers, and commerce engines — from relational schemas up to fluid, responsive UI. Currently finishing my CS degree and shipping real products.

$npx gulshan-kumar📋 click to copy
PROFILE_STATUS.md
Open to Work
Gulshan Kumar
Gulshan Kumar
Karachi, PK · GMT+5
0+
PROJECTS SHIPPED
0
CERTIFICATIONS
0
DEEP CASE STUDIES
0
SAAS LAUNCHING
Stack: TypeScript / RAG / Next.jsReady to deploy ✓
Full-Stack
// React · Next.js · Node · Postgres
RAG & Agents
// LangChain · LangGraph · Vector Search
BS CS
// Bahria University, Karachi — 2026
Frontend Dev
// Horquva — Jul–Sep 2026
stack.json

Tools I reach for

The stack behind every project below — frontend to backend to the AI layer. Scroll faster, the row speeds up with you.

HTML5CSS3JavaScriptTypeScriptReactNext.jsNode.jsPrismaPostgreSQLHTML5CSS3JavaScriptTypeScriptReactNext.jsNode.jsPrismaPostgreSQL
MongoDBRedisLangChainLangGraphDeploymentGitTailwind CSSThree.jsFastAPIMongoDBRedisLangChainLangGraphDeploymentGitTailwind CSSThree.jsFastAPI
MODULE_01

Frontend

Interfaces that don't make people think.

ReactNext.jsTypeScriptTailwind CSSThree.js
MODULE_02

Backend & Data

APIs and schemas that hold up under real use.

Node.jsPrismaPostgreSQLMongoDBRedisFastAPI
MODULE_03

AI & Agents

RAG pipelines and agents grounded in real data.

LangChainLangGraphVector SearchClaude API
MODULE_04

Tooling & Deployment

Shipping, not just building.

GitDockerViteVercel
featured_work/

Three products, three different problems

Deep dives into what I built, the role I played, and the stack behind each one.

Sage — Chat
Launching as SaaS01 / Support & RAG

Sage — AI support assistant, grounded in your own docs

Support teams need answers pulled from their actual documentation, not a chatbot guessing. Sage ingests a knowledge base from URLs, files, raw text, or Q&A pairs, indexes it, and answers questions with cited sources — plus a dashboard to see what's actually being asked.

RoleSolo builder — architecture, backend, and UI
BuiltMulti-source ingestion, chunking + vector search, chat playground with source citations, analytics dashboard
Next.jsNode.jsTF-IDF Vector SearchSQLite
On GitHub02 / SaaS Platform

BizPilot AI — “Your AI employee for small businesses”

Small businesses can't afford a full ops team. BizPilot AI gives them one: a multi-tenant platform that handles catalog, orders, and inventory, backed by a RAG-powered agent that can answer questions and take actions using the business's own data.

RoleSolo full-stack build across a TypeScript monorepo
BuiltAll 10 planned phases — auth through deployment config
ExpressPrismaPostgreSQLReact 19pgvectorOpenAI
View on GitHub
BIZPILOT_AI // BUILD STATUS10/10 phases
Multi-tenant authshipped
Product catalog & ordersshipped
Inventory & analyticsshipped
pgvector RAGshipped
OpenAI function-calling agentshipped
Team invitations & security hardeningshipped
All phases complete100%
ShopMind e-commerce site with embedded AI shopping assistant
On GitHub03 / Commerce & AI

ShopMind — a shopping assistant built into the store, not bolted on

Most storefront chat widgets feel disconnected from the actual shopping flow. ShopMind's assistant sits inside the store itself — a shopper can ask for “running shoes under $100” in plain language and get real product suggestions, right where they're already browsing.

RoleBuilt the storefront and the AI assistant together, as one product
BuiltEmail + Google auth, account/cart flows, conversational product discovery
E-commerceAI Shopping AssistantAuth
View on GitHub
experience.log

Where I've worked

Jul 2026 — Sep 2026
Karachi / Remote
Frontend Developer
Horquva — CASTOR v1.0 (AI Experience Engineering Platform)
  • Contributed to the front-end and experience design of CASTOR v1.0, covering AI experience architecture and conversation/context design.
  • Delivered structured documentation and workflow specifications for executive AI workflows and platform review/readiness reporting.
  • Collaborated directly with the founding team to shape user-facing AI experience flows for the platform.
projects/

More things I've shipped

Beyond the three deep dives above — the rest of what's on GitHub.

LedgerX screenshot
LedgerX

Fintech double-entry ledger dashboard — account transfers, idempotency keys, and real-time balance tracking.

Double-Entry LedgerIdempotent Transfers
TaskFlow AI screenshot
TaskFlow AI

Task and project management app with role-based auth and demo admin / moderator accounts.

Task ManagementRole-Based Auth
SuperMart POS screenshot
SuperMart POS

Billing and point-of-sale system built for a Pakistani retail context — fast, error-free checkout.

React (Vite)ExpressSQLite
PR #42 · PASSED
await devpilot.reviewCode()
↳ 0 security vulns · 99.8% AST pass
● FastAPI EngineRAG Citations ✓
DevPilot AI

Dashboard for an AI codebase-review SaaS — trigger reviews, track workflow status, and view AI output in real time.

Next.js 14FastAPIPrismaRAG
ATS MATCH SCORE
94/100
Claude API · Docker Backend
Keyword Match 98%ATS Formatted ✓
AI Resume Optimizer

Resume upload, parsing, and ATS-score output — Claude API integration with a Dockerized backend.

Next.jsFastAPIDocker
⚡ REAL-TIME MULTIPLAYERLIVE SYNC
284 MPH
HTML5 Canvas · 60 FPS · Socket.io
Ping: 12msRoom: #04 (4/4 Players)
NITRO DASH

Multiplayer browser car game built with HTML5 Canvas and real-time sync over sockets.

HTML5 CanvasSocket.io
PEER-TO-PEER NETWORK
Learner
React 19
Mentor
FastAPI
1-on-1 Session Scheduling & Real-time Match
Skill Swap

Peer-to-peer skill exchange platform connecting learners and mentors to trade expertise, schedule 1-on-1 sessions, and share knowledge.

Skill ExchangeReal-time ChatFull Stack
TABLE #04 · KOT ACTIVEBILL #1092
2x Chicken Biryani SpecialPKR 1,100
1x Fresh Lime / BeveragePKR 180
TOTAL: PKR 1,280PAID ✓
Karachi Foods

Restaurant billing and management system featuring table management, KOT kitchen tickets, instant receipts, and daily sales auditing.

Restaurant POSOrder ManagementExpress & SQLite
ROOM 304 · DELUXEOCCUPIED
Guest: Imran S. (2 Nights)
Keycard #8821 · Room Service Auto-Billing
Check-out: Tomorrow 11:00 AMLedger Synced
Hotelz

Hotel management and room booking application handling guest check-in/out, room occupancy calendars, billing, and reservation workflows.

Hotel ManagementRoom BookingReact & Node
Gulshan Kumar portrait
LOCATIONKarachi, Pakistan
EDUCATIONBS Computer Science, Bahria University (2022–2026)
LANGUAGESEnglish, Urdu, Sindhi, Marwari
about.md

A bit about how I work

I'm a final-year Computer Science student in Karachi, and a full-stack engineer who'd rather ship a working product than talk about one. Most of what I know, I learned by building: a RAG-powered support assistant, a multi-tenant SaaS platform, a POS system built for how retail actually runs here, a double-entry ledger that has to get the money math exactly right.

I care about the parts most people skip — clean data models, fast APIs, interfaces that don't make people think. Right now I'm working as a frontend developer on Horquva's CASTOR platform, finishing my degree, and looking for a team that ships.

Verified Certifications
JPMorgan Chase — Software EngineeringDeloitte — CyberBCG X — GenAISkyscanner — Front-End EngineeringY Combinator Startup — Software EngineerSiemens — Project ManagerAnthropic — Claude with Amazon BedrockAnthropic — MCP: Advanced TopicsHP LIFE — Data Science & AnalyticsHP LIFE — AI for Beginners
contact.sh

Let's build something.

Open to full-time engineering roles, AI projects, and interesting software problems. Send a direct message below or reach me directly.

SEND_DIRECT_DISPATCH.sh
emailjs · live