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@CODEx-GECSIWAN

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vikashkrdeveloper/README.md
typing

Portfolio LinkedIn Play Store LeetCode Email


Identity

const vikash: Engineer = {
  name        : "Vikash Kumar",
  role        : "AI-Native Full Stack Engineer - SDE-1 Aspirant",
  education   : "B.Tech CSE-IoT @GEC Siwan, Bihar | Oct 2022 – May 2026 | CGPA: 7.27",
  available   : true,
  phone       : "+91 736-288-5182",
  targeting   : ["SDE-1", "Full Stack", "React Native", "Backend", "AI-Integration"],

  production : {
    company      : "Sewacity Technologies Pvt Ltd",
    users        : "10,000+",
    transactions : "2,000+ / month",
    playStore    : "https://play.google.com/store/apps/details?id=com.sewacity.sewacity",
    reliability  : "+40% payment success via Razorpay webhook orchestration",
    growth       : "+36% order growth via latency-optimized REST APIs",
    security     : "-60% unauthorized access via JWT/RBAC + rate limiting + DDoS",
    failures     : "-30% payment failures via retry logic + reconciliation",
  },

  stack : {
    languages  : ["TypeScript", "JavaScript", "C++", "HTML", "CSS", "SQL", "NoSQL"],
    frontend   : ["React", "Next.js", "Tailwind CSS", "shadcn/ui", "Redux", "Zustand"],
    backend    : ["Node.js", "Express.js", "REST APIs", "WebSockets (Socket.io)", "JWT/RBAC"],
    mobile     : ["React Native", "Expo EAS", "Firebase OTP", "AAB/IPA signing", "TestFlight"],
    database   : ["MongoDB", "Redis", "MySQL", "PostgreSQL", "Supabase", "GridFS"],
    cloud      : ["AWS EC2/S3/Route53", "Docker", "Kubernetes", "NGINX", "PM2", "CI/CD"],
    ai         : ["MCP Protocol", "LLM SDK Integration", "Claude AI", "ChatGPT", "Copilot"],
  },

  dsa         : "600+ problems | C++ | LeetCode + GeeksforGeeks + Codeforces",
  hackathons  : ["IIT BHU Shilp'24 - 2nd Place (50+ teams)", "TechKshitiz GEC Siwan - 1st Place"],
  leadership  : "Technical Team Lead @TechKshitiz, GEC Siwan - 20 months",
  vision      : "SDE-1 → Senior Engineer → CTO / Technical Co-Founder",
};

AI-Native Engineering

Not a chatbot wrapper. Real architectural integration of AI and LLM reasoning into production systems via MCP Protocol - the same pattern powering Claude, Cursor, and next-gen AI tooling.

  User Input  →  LLM (Claude/GPT)  →  MCP Protocol  →  Tools / APIs / DB / IoT  →  Result
      │                │                    │                     │                     │
   Natural         Reasoning            JSON-RPC 2.0         MongoDB • Redis        Structured
   language        over live            Tool contracts        RFID • REST             output back
   prompt          context              (Host→Client→Server)  Sensors • GridFS       to product UI

My AI Integration Stack

Claude ChatGPT Copilot MCP Antigravity

How I use each tool in my actual workflow:

  • Claude AI - architecture decisions, writing technical documentation, code review, system design walkthroughs, and MCP server implementation. I don't use it to write code blindly - I use it to think through design tradeoffs before touching the keyboard.
  • ChatGPT - quick syntax fixes, exploring multiple approaches to the same problem, rubber-duck debugging on unfamiliar APIs, generating test cases.
  • GitHub Copilot - in-editor code completion, reducing boilerplate in repetitive patterns (route handlers, schema definitions), and surfacing API signatures mid-flow.
  • Antigravity AI Editor - AI-native editor for faster development loops with embedded LLM assistance.

MCP in production (Academic Management System):

// MCP Server: academic-intelligence
// Architecture: Host (Claude) → MCP Client → MCP Server → MongoDB + RFID sensors
// Transport: JSON-RPC 2.0 over stdio

const tools = [
  {
    name: "get_student_recommendations",
    // LLM receives live student context → reasons → returns structured suggestions
    // Zero prompt leakage. Typed contracts. Auditable tool calls.
  },
  {
    name: "analyze_performance_patterns",
    // Connects LLM reasoning to MongoDB aggregation pipelines directly
  }
];
// Result: AI-powered personalized resource recommendations running in production
// User → LLM → MCP → MongoDB + RFID → Personalized response

Production Impact - Sewacity Technologies

Metric Result How
Users Served 10,000+ Web platform + React Native app (Play Store)
Monthly Transactions 2,000+ Razorpay payment pipeline
Payment Reliability +40% Webhook orchestration + retry logic + idempotency
Order Growth +36% Latency-optimized REST APIs + geo-aware backend
Unauthorized Access -60% JWT/RBAC + rate limiting + DDoS safeguards
Payment Failures -30% Failure reconciliation layer + dead-letter logging
Transaction Integrity 100% Server-side Razorpay HMAC-SHA256 verification
GitHub Contributions 2,132 Last 12 months - consistent daily engineering

Sewacity App


Tech Stack

Languages

TypeScript JavaScript C++ HTML CSS

Frontend

React Next.js Tailwind Redux Vite Figma

shadcn/ui Zustand React Query Context API Aceternity UI Jest a11y Debouncing Infinite Scroll

Backend

Node.js Express

REST APIs WebSockets Socket.io Client gRPC JWT RBAC Razorpay Twilio Rate Limiting Event-Driven

Database

MongoDB Redis PostgreSQL MySQL Supabase Firebase

GridFS Schema Design Query Optimization

Mobile (React Native)

React Native Expo EAS Expo Dev Tools Expo Debugger Android Studio iOS Simulator Play Console Apple Dev Console TestFlight Firebase OTP Push Notifications Beta Testing

Cloud, DevOps & Infrastructure

AWS Docker Kubernetes Azure NGINX GitHub Actions Linux Git

EC2 S3 Route53 Docker Hub GitLab PM2 Hostinger VPS DDoS

Developer & Productivity Tools

Figma Notion

Firebase Console Supabase Console Google Cloud Console Google Sheets API Trello Notion Postman VS Code Figma

Figma: I read and implement designs, convert component specs to production-ready code. Design creation is not my primary strength - shipping designs as pixel-accurate components is.


Featured Projects

Sewacity Mobile App - iOS + Android

Play Store TestFlight

React Native Expo EAS Redux Firebase Node.js

Production React Native app - 10K+ users, 2K+ monthly orders. Redux state, Firebase OTP auth, server-side Razorpay verification, real-time order tracking, geo-location. Expo EAS builds with AAB signing (Play Store) and IPA distribution (Apple Dev Console + TestFlight).

SafeExec - Enterprise RCE Platform

GitHub

Docker JWT Redis Node.js

Secure open-source Remote Code Execution platform. Every execution runs in an isolated Docker container - no shared state. Redis job queue for scalable throughput. Multi-language support (Python, JS, Java, C++, C#, Go). Swagger UI docs. Built for exam platforms, hiring tools, online judges.

Contest & Event Management Platform

GitHub

Next.js TypeScript Node.js Firebase MongoDB

Built for TechKshitiz, GEC Siwan - ran a live contest for 300+ students simultaneously in production. Automated seating assignment, participant verification, integrated code editor, real-time test workflows. Designed to scale to institutional exam bodies.

Academic & Library Management System (AI + IoT)

Live Demo

MCP AI RFID IoT JWT/RBAC MongoDB

Campus management with RFID automation, MCP-based LLM recommendation engine, layered RBAC, coursework workflows, scheduling, and digital repository. Real MCP server implementation connecting LLM reasoning to live MongoDB + IoT sensor data.

MongoDB GridFS Bucket System

GitHub

GridFS Node.js Express

Open-source file storage API on MongoDB GridFS. Store, stream, and manage large files via a clean REST interface. Documented and production-ready. Solves the S3-overkill problem for small-to-medium file management.

Portfolio v3 - Production SPA

Live GitHub

Vite TypeScript Tailwind

React.lazy() on 13 components, JSON-LD structured data, SEO via react-helmet-async, Google Search Console verified, Lighthouse-optimized LCP/FCP. Live MCP/AI architecture diagram with animated data flow. Branch: feat/full-portfolio-v3.


Engineering Philosophy

  Problem → Decompose → Data Model → API Contract → Security Layer → Fault Paths → Ship

  Real example @Sewacity - Razorpay Webhook Reliability
  ──────────────────────────────────────────────────────
  Problem  : Payment status inconsistency - client-side verification unreliable
  Root     : No idempotency, no retry on failures, no reconciliation job
  Solution : Server-side HMAC-SHA256 signature verification
             + Idempotency key per webhook event
             + Redis retry queue with exponential backoff
             + Cron-based failure reconciliation job
             + Dead-letter log for manual audit trail
  Result   : +40% transaction success, -30% failures, 100% integrity

GitHub Analytics




DSA


Achievements


50+ competing teams - full-stack solution under time pressure

GEC Siwan - led and won the hackathon

TechKshitiz org, GEC Siwan

DNS, SSL, production server management

What I Bring to Your Team

Funded Startups (Seed / Series A)

Badge

Full stack from mobile to infra. Built for 10K+ users as a solo contributor. I don't wait for tickets - I find bottlenecks, scope the fix, and ship. Built for early-stage velocity where every engineer counts.

MNCs and Product Companies

Badge

Security-hardened APIs, event-driven design, fault-tolerant webhook systems. Docker, AWS, CI/CD, NGINX in production. Strong DSA foundation (600+ problems). Code that survives proper code review.

AI-First Products

Badge

I understand MCP protocol architecture end-to-end - not just API calls. I've shipped LLM-driven features in production with real data contracts and typed tool schemas. No brittle prompt hacks.


Currently

  Open for     →  SDE-1 / Full Stack / React Native / Backend / AI-Integration roles
  Building     →  Razorpay Webhook Debugger SaaS (MVP scoping)
  Integrating  →  Meta Ads FBSDK + Conversions API (server-side, production)
  Learning     →  MCP tooling, AI-connected developer utilities
  DSA          →  Medium → Hard (Graphs, DP, System Design)
  Vision       →  SDE-1 → Senior Engineer → CTO / Technical Co-Founder

Connect

Open to SDE-1, Full Stack, React Native, and Backend roles at startups and product companies.


Portfolio LinkedIn Play Store Email LeetCode Codeforces


Vikash Kumar  -  Built with intent. Every commit ships toward production.

Pinned Loading

  1. SafeExec SafeExec Public

    Secure, open-source RCE platform with Docker isolation, JWT auth, rate limiting, and multi-language support.

    TypeScript 1

  2. Event-and-Contest-Management Event-and-Contest-Management Public

    🚀 Event & Contest Management Platform - a scalable solution built with React, TypeScript, JavaScript, and TailwindCSS. Featuring an integrated code editor 💻, it enables seamless participation, effi…

    TypeScript 2

  3. MongoGridFS-FilesBucket MongoGridFS-FilesBucket Public template

    A developer-friendly bucket system powered by MongoDB GridFS 🗄️. Store, fetch, and manage large files seamlessly 🚀 - simple, scalable, and open-source. 🌐

    JavaScript

  4. CI-CD-Integration-IN-NodeJS CI-CD-Integration-IN-NodeJS Public

    Testing CI/CD pipelines in Node.js 🚀. Automating build, test, and deploy with simple workflows. ⚙️

    JavaScript 1 1

  5. CodeForce-Solved-Problem CodeForce-Solved-Problem Public

    A beginner-friendly repository documenting my journey of solving Codeforces problems using C++ 🚀.

    C++ 2