Manish
Full-Stack Developer

Hi, I'm Manish Kumar

Building full-stack, AI-integrated web applications and developer-focused platforms end-to-end.

MERN Stack Developer with hands-on experience shipping full-stack, AI-integrated web applications end-to-end — from architecture and API design through production deployment and performance tuning.

View projectsContact MeExperience →

Featured project

Main project selected from the CMS — not hardcoded.

TraceVista thumbnail

Main project

TraceVista

AI API testing platform with historical analysis, similar-failure detection, and knowledge search.

  • Next.js
  • TypeScript
  • Fastify
  • PostgreSQL
  • pgvector
  • Redis
  • BullMQ
  • Gemini API
  • RAG
View case studyLive productGitHub

Projects

Published work loaded dynamically from MongoDB.

  • CodeQuery Microservices Migration thumbnail

    Enterprise Architecture · Backend Infrastructure

    CodeQuery Microservices Migration

    Decoupled monolithic web application into service-oriented architecture with event-driven background queues.

    • Node.js
    • Express.js
    • TypeScript
    • Redis
    • BullMQ
    DetailsGitHub
  • DevFlow Workspaces thumbnail

    Web Application · Full-Stack Product

    DevFlow Workspaces

    Real-time collaborative developer dashboard with WebSocket state sync, task queues, and team analytics.

    • React.js
    • Next.js
    • TypeScript
    • Socket.IO
    • MongoDB
    DetailsGitHub
  • GuardRail API Gateway thumbnail

    Infrastructure Service · Security & Middleware

    GuardRail API Gateway

    High-performance API proxy with token bucket rate-limiting, internal IP SSRF filtering, and JWT validation.

    • Fastify
    • Node.js
    • TypeScript
    • Redis
    • NextAuth.js
    DetailsGitHub
  • LogPulse AI Log Search thumbnail

    AI & Data System · Developer Infrastructure

    LogPulse AI Log Search

    Distributed logging aggregator utilizing vector embeddings and semantic search for instant root-cause diagnostics.

    • TypeScript
    • Node.js
    • PostgreSQL
    • pgvector
    • Gemini API
    DetailsGitHub
All projects →

Experience

Intern → full-time progression with increasing ownership.

  1. MERN Stack Developer

    Sep 2025 – Present

    CodeQuery · Full-time

    • Own end-to-end development of complex full-stack features — from requirement analysis and system design through implementation, integration, testing, and production deployment.
    • Design and build scalable REST APIs and complete application workflows across the frontend and backend using React/Next.js and Node.js/Express.
    • Contribute to the migration of a monolithic system toward a microservices-oriented architecture, helping define service boundaries and integration patterns.
    • Analyze and resolve production bottlenecks — optimizing slow APIs, database interactions, and page-load paths — and handle deployment, release management, and debugging on VPS environments.
    • Collaborate through code reviews and technical discussions, driving large features from architecture through final delivery.

  2. MERN Stack Developer Intern

    Jun 2025 – Sep 2025

    CodeQuery · Internship

    • Implemented frontend and backend features, participated in code reviews, and prepared technical documentation.
    • Supported VPS deployment, debugging, API performance tuning, and initial microservice refactoring.

Skills

Grouped by domain — frontend, backend, database, AI & tools.

Languages

  • JavaScript
  • TypeScript
  • C++

Frontend

  • React.js
  • Next.js
  • Redux Toolkit
  • TanStack Query
  • shadcn/ui
  • Tailwind CSS

Backend

  • Node.js
  • Express.js
  • Fastify
  • REST APIs
  • Socket.IO
  • NextAuth.js
  • Prisma ORM
  • BullMQ

Database

  • PostgreSQL
  • MongoDB
  • Redis
  • pgvector

AI & Data

  • Gemini API
  • Embeddings
  • RAG
  • Vector Search
  • Recharts

Tools & DevOps

  • Git
  • GitHub
  • Postman
  • Vercel
  • AWS EC2
  • VPS
  • CI/CD

About

MERN Stack Developer with hands-on experience shipping full-stack, AI-integrated web applications end-to-end — from architecture and API design through production deployment and performance tuning.

I am a MERN Stack & Full-Stack Developer with hands-on experience shipping full-stack, AI-integrated web applications from initial architecture through production deployment.

I built and deployed TraceVista, a production AI-powered API testing platform using Next.js, Fastify, PostgreSQL, Redis, and Gemini API with pgvector-based RAG analysis.

My focus is on production-grade execution under real traffic: microservices migration, API performance tuning, server-side security, and maintainable software architecture.

Engineering approach

  • Requirement analysis and end-to-end system design
  • Explicit service boundaries and REST API design
  • Server-side validation, SSRF protections, and secure defaults
  • Production debugging, VPS/cloud deployment, and performance tuning

Education

B.Tech, Computer Science & Engineering

Gaya College of Engineering, Gaya

2024

Achievements

  • Solved 700+ coding problems on LeetCode and GeeksforGeeks covering data structures, algorithms, and problem-solving across multiple difficulty levels.

Contact

Open to roles and collaborations involving production web systems and developer tools.

Reach out by email — I respond to thoughtful messages about product engineering and full-stack roles.

manishrajcse74@gmail.com
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