Available for opportunities

Hi, I'm
Rajesh

Full Stack Software Engineer — MERN Stack

I craft scalable, high-performance web applications from Mohali, Chandigarh, India. 2+ years of turning complex problems into elegant solutions.

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// Rajesh Sarkar
const developer = {
name: Rajesh Sarkar,
role: Full Stack Dev,
exp: 2// years
stack: ["React", "Next.js", "Node.js"],
available: true
};
console.log("Let's build!");

The person behind the code

Full-stack developer dedicated to building high-performance applications with a focus on maintainability and scalable architecture.

Rajesh Sarkar

Rajesh Sarkar

Full Stack Engineer • MERN Specialist

With 2+ years of professional experience, I bridge the gap between complex backend logic and seamless frontend experiences. I don't just write code; I architect systems.

Frontend

Crafting intuitive, high-performance React interfaces with optimized state management.

Backend

Architecting robust Node.js APIs and scalable MongoDB schemas for production environments.

Beyond the IDE, I focus on performance optimization patternsand emerging web standards to ensure every line of code I ship is scalable and future-proof.

Core Principles

Clean ArchitecturePerformance FirstUser-FocusedContinuous LearnerDetail OrientedTeam Player

Technical expertise

The languages, frameworks and tools I reach for to take products from idea to production.

JavaScript90
React.js92
Next.js88
Node.js85
TypeScript82
MongoDB80
Express.js84
Redux78
AWS (EC2, S3, Lambda)70
Claude AI60
ChatGPT (GPT-5.5)50
Postman70
S350
CI/CD60
GitHub80
Git80
Vercel80
MySQL40
OpenAI APIs60
Gemini APIs60
Socket.IO60
Cloudinary70

Also proficient in

MySQLPostgreSQLRedisDockerGit / GitHubREST APIsGraphQLSEO OptimizationPerformance TuningTailwindCSSJest / TestingCI/CD PipelinesLinux / BashFigma
What We Build

End-to-End Digital Services

From idea to deployment and beyond — we handle every layer of the stack so your team can focus on what matters.

01

Custom Software Development

Tailor-made software engineered to your exact business logic — scalable, maintainable, and built for long-term performance.

PythonNode.jsGoMicroservices
02

Web Application Development

High-performance web apps with modern stacks. From SPAs to full-stack platforms, we craft experiences users love.

Next.jsReactTypeScriptPostgreSQL
03

Mobile App Development

Native and cross-platform mobile apps for iOS and Android with smooth UX, offline support, and real-device performance.

React NativeFlutteriOSAndroid
04

API Development & Integration

Robust RESTful and GraphQL APIs. We design, document, and integrate third-party services to connect your ecosystem.

RESTGraphQLOpenAPIWebhooks
05

Cloud Solutions

Cloud-native architecture on AWS and Google Cloud. Infra-as-code, auto-scaling, CI/CD pipelines, and cost optimization.

AWSGoogle CloudTerraformDocker
06

UI/UX Design

Research-driven design that converts. Wireframes, prototypes, and pixel-perfect interfaces built in Figma.

FigmaPrototypingDesign SystemsUser Research
07

E-commerce Solutions

End-to-end commerce platforms with inventory, payments, and analytics. Built to scale from launch to millions.

ShopifyStripeNext.jsHeadless
08

SaaS Development

Full-lifecycle SaaS product development — multi-tenancy, billing, auth, and the dashboards your customers need.

Multi-tenantStripe BillingAuthAnalytics
09

Maintenance & Support

Ongoing monitoring, performance tuning, security patches, and feature updates. We keep your product healthy 24/7.

MonitoringSecurityUpdatesSLA

Need something not listed above? Let's talk about your project

Featured work

A selection of projects showcasing full-stack capabilities and design thinking.

UphaarBox — Pilibhit Local E-Commerce Platform
🛒

UphaarBox — Pilibhit Local E-Commerce Platform

Built a local e-commerce platform for Pilibhit with product browsing, secure payments, order management, and an admin dashboard.

Next.jsMongoDBRedux ToolkitStripe
Pathology Management System
Featured
🧪

Pathology Management System

A comprehensive pathology management system for efficient lab operations, patient management, and test result tracking.

Next.jsNode.jsMongoDBExpress
School Management System
🏫

School Management System

A comprehensive school management system for efficient administration, student tracking, and communication.

Next.jsNode.jsMongoDBExpress
skillup —  edtech Project
📝

skillup — edtech Project

Real-time project management tool with drag-and-drop boards, team collaboration, live notifications, and Kanban views.

ReactNode.jsMongoDBSocket.io
ColorPlay — Images Generations
💬

ColorPlay — Images Generations

ColorPlay is a creative image generation platform that allows users to generate unique visuals using AI-

ReactExpressSocket.ioJWT
Hydrohaven — Dashboard
📊

Hydrohaven — Dashboard

We provide Bitlote solutions designed to deliver seamless performance, reliability, and a smooth user experience.

Next.jsTypeScriptChart.jsMySQL
Portfolio — Healthcare App
🏥

Portfolio — Healthcare App

Doctor-patient appointment booking with e-prescriptions, medical records management, and video consultation integration.

ReactNode.jsMongoDBAWS S3
DevBlog — Tech Blog Platform
🚀

DevBlog — Tech Blog Platform

SEO-optimised developer blog with MDX support, syntax highlighting, newsletter integration, and 95+ Lighthouse score.

Next.jsTailwindCSSMDXSEO

Library

Books I ve Read

A collection of books that shaped my thinking.

Atomic HabitsCompleted

Atomic Habits

James Clear

SapiensCompleted

Sapiens

Yuval Noah Harari

Zero to OneCompleted

Zero to One

Peter Thiel

The Psychology of MoneyCurrently Reading

The Psychology of Money

Morgan Housel

Deep WorkCurrently Reading

Deep Work

Cal Newport

The Almanack Of Naval RavikantUp Next

The Almanack Of Naval Ravikant

Eric Jorgenson

Rich Dad Poor DadUp Next

Rich Dad Poor Dad

Robert Kiyosaki and Sharon Lechter

The Lean StartupUp Next

The Lean Startup

Eric Ries

Experience

My professional journey building software that matters.

Mentoxo Technology

2025 — Present

Full Stack Developer

  • Architected microservice-based Node.js APIs serving 10K+ daily requests
  • Built responsive React dashboards, reducing user task completion time by 40%
  • Implemented secure authentication and role-based authorization with protected routes and access controls
  • Implemented real-time communication and live updates using Socket.IO for chat, notifications, and collaborative features
  • Implemented Redis caching and MongoDB indexing, improving API latency by 60%
  • Led REST → GraphQL migration, improving client-side data-fetching efficiency
  • Managed user access, permissions, session handling, and authentication workflows across the platform

CyberClipper Solutions LLP Dehradun

2025 — 2023

Junior Full Stack Developer

  • Developed 8+ client-facing web applications using React.js and Next.js
  • Designed MongoDB schemas and built scalable RESTful APIs with Express.js
  • Integrated OpenAI ChatGPT APIs and DeepAI APIs to build AI-powered features and automation workflows
  • Implemented AI-driven text generation, content processing, and intelligent user interactions
  • Improved Core Web Vitals scores to 90+ across client projects
  • Collaborated with designers to deliver pixel-perfect, responsive user interfaces

SofTech Pilibhit

2021 — 2022

Frontend Developer Intern

  • Delivered 5+ end-to-end web applications and small e-commerce solutions for local businesses
  • Developed business websites and customized web solutions based on client requirements
  • Implemented secure user authentication and role-based authorization for web applications
  • Built reusable React components and UI libraries, reducing development time across projects
  • Provided SEO optimization services, improving organic traffic by 35%
  • Integrated product listings, shopping cart, user accounts, and basic order management for e-commerce applications

My Education

My academic background and continuous learning journey.

8
Key Class 12 math chapters
3
Academic stages
4
Core focus areas
Daily
Practice habit

Uttarakhand University

Bachelor of Computer Applications (BCA)

Currently pursuing

Building a strong foundation in computer science and full-stack engineering, with a focus on scalable, high-performance web applications. I care about clean architecture, optimized backend systems, responsive interfaces, and code that stays maintainable as projects grow.

  • Practicing data structures & algorithms weekly in C++ and JavaScript
  • Studying system design: scalability, caching, load balancing, database design
  • Building full-stack projects with React, Node.js, REST APIs, SQL and NoSQL
  • Learning how operating systems, networks, and databases work under the hood
Data Structures & AlgorithmsSystem DesignDBMS & SQLOperating SystemsComputer NetworksOOPSoftware EngineeringWeb Technologies

AK Inter College

Intermediate, Class 12th (Science Stream)

Completed

Completed the Science stream with a strong base in Physics, Chemistry, and Mathematics. Built a lasting interest in numerical problem-solving and analytical thinking, performing consistently well in Mathematics and Physics.

  • Developed strong logical reasoning through advanced Mathematics
  • Applied theory in laboratory experiments and assignments
  • Discovered programming and chose a career in software
PhysicsChemistryMathematicsEnglishComputer Basics

CGS Inter College

High School, Class 10th (Science Stream)

Completed

Completed High School in the Science stream with a solid academic foundation. Built analytical and problem-solving skills through consistent work in Mathematics and Physics, and took an active part in laboratory work.

  • Built conceptual clarity in core science and mathematics
  • Participated in lab experiments and school academic activities
PhysicsChemistryMathematicsScienceEnglish

Class 12th Important Math

The most important Class 12th mathematics chapters. Stars show how heavily each one counts in exams.

Mathematics

8 key chapters

= highest weightage
  • Matrices
    Types of matricesMatrix operationsTransposeInverse of matrix
  • Determinants
    PropertiesArea of triangleSolving linear equations
  • Continuity & Differentiability
    ContinuityDifferentiationChain ruleImplicit differentiation
  • Applications of Derivatives
    Increasing/decreasing functionsMaxima & minimaTangents and normals
  • Integrals
    Indefinite integrationIntegration methodsDefinite integrals
  • Vector Algebra
    VectorsDot productCross product
  • Three-Dimensional Geometry
    Direction cosinesLinesPlanesAngles and distances
  • Probability
    Conditional probabilityBayes' theoremRandom variablesProbability distributions

Beyond the Classroom

What I study every week to grow as an engineer.

Data Structures & Algorithms

Priority

Arrays, linked lists, stacks, queues, trees, graphs, heaps, hashing, recursion, dynamic programming, sorting and searching, with Big-O analysis.

Trees & GraphsDynamic ProgrammingHashingBig-O
Learning progress60%

System Design

Priority

Designing scalable systems: load balancing, caching, sharding and replication, message queues, rate limiting, and API design.

ScalabilityCachingShardingQueues
Learning progress40%

Databases

Relational modelling, normalization, indexing, transactions, query optimization, and choosing between SQL and NoSQL.

SQLIndexingACIDMongoDB
Learning progress65%

Core CS Fundamentals

Operating systems, computer networks, OOP principles, and design patterns that keep code reliable and easy to extend.

OSNetworkingOOPPatterns
Learning progress55%

Learning & Credentials

Continuous learning through recognised certifications and courses.

Meta Front-End Developer

Meta / Coursera

2023

AWS Certified Cloud Practitioner

Amazon Web Services

2023

MongoDB Certified Developer

MongoDB University

2022

JavaScript Algorithms & DS

freeCodeCamp

2022

React — The Complete Guide

Udemy — Maximilian S.

2022

Node.js Developer Certificate

HackerRank

2021

Let's Work Together

Have a project in mind? I'd love to hear about it.

Get in Touch

Whether you have a job opportunity, a project idea, or just want to connect — my inbox is always open. I'll get back to you within 24 hours.