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sai4u-dev/README.md

Hi, I'm Sai Narendra πŸ‘‹

Software Engineer | Full-Stack Developer | React | Node.js | Spring Boot | TypeScript | AWS | MongoDB | PostgreSQL

I build full-stack web applications, backend APIs, and developer-focused products with a focus on clean architecture, authentication, performance, and maintainable code.

Currently working at AccioJob and open to Software Engineer / SDE-1 opportunities where I can contribute to building reliable, scalable products.


πŸš€ What I Build

  • Full-stack applications with React, Next.js, Node.js and Spring Boot
  • REST APIs with authentication, authorization and validation
  • Backend systems using MongoDB, PostgreSQL, Redis, and SQL
  • AI-powered applications using LLM APIs
  • Secure application flows using JWT, RBAC, HTTP-only cookies, and Rate Limiting
  • File and media workflows using AWS S3
  • Algorithmic problem-solving and Data Structures & Algorithms

🧰 Tech Stack

Languages

JavaScript TypeScript Java SQL

Frontend

HTML CSS JavaScript TypeScript React Next.js Redux Toolkit Tailwind CSS

Backend

Node.js Express.js Spring Boot REST APIs JWT RBAC

Databases

MongoDB SQL

Cloud & Tools

AWS S3 Firebase Supabase Git GitHub Vercel

AI

OpenAI APIs Google Gemini NVIDIA NIM LLM Integrations


⭐ Featured Projects

πŸ”— Accio Connect

Production-oriented community platform for users to create communities, publish content, interact, and communicate.

Built with: React, Node.js, Express, MongoDB, JWT, AWS S3

Engineering focus:

  • Authentication and protected routes
  • REST API architecture
  • Post and media management
  • AWS S3 file uploads
  • MongoDB data modeling
  • Frontend/backend separation

View Repository


πŸ›‘οΈ CyberHUD Command

A security-focused full-stack application demonstrating authentication, authorization and backend engineering patterns.

Built with: React, Node.js, Express, MongoDB

Engineering focus:

  • JWT authentication
  • Role-based access control
  • HTTP-only cookies
  • Rate limiting
  • Request validation
  • Security headers
  • Database indexes
  • Pagination
  • Protected API routes

View Repository


πŸ€– AI Resume Builder

An AI-assisted resume creation platform with structured editing and resume generation workflows.

Built with: React, JavaScript, Redux Toolkit, Gemini API

Engineering focus:

  • AI API integration
  • State management
  • Resume editing workflows
  • PDF generation
  • Structured application architecture

View Repository


🧠 DSA Mastery

A structured collection of Data Structures & Algorithms implementations and problem-solving notes.

Topics include:

Arrays Hashing Linked Lists Stacks Queues Trees Graphs Binary Search Greedy Dynamic Programming Recursion Tries

View Repository


πŸ“Š Problem Solving

I actively practice Data Structures & Algorithms on LeetCode.

  • 343+ LeetCode problems solved in JavaScript
  • Regular DSA practice
  • Focus areas: arrays, hashing, trees, graphs, binary search, greedy and dynamic programming

LeetCode β†’


πŸ§‘β€πŸ’» Current Focus

Full-Stack Engineering
        ↓
Backend & API Design
        ↓
DSA & Problem Solving
        ↓
System Design Fundamentals
        ↓
Production-Ready Applications

I'm currently focused on improving:

  • Backend architecture
  • API design
  • Database design
  • Authentication & authorization
  • Performance optimization
  • System design fundamentals
  • Testing and production engineering

πŸ“ˆ Engineering Principles

I care about:

  • Writing maintainable code over clever code
  • Designing APIs around clear contracts
  • Validating inputs at system boundaries
  • Treating authentication and authorization as first-class concerns
  • Understanding database access patterns and indexes
  • Measuring performance before optimizing
  • Building features that solve actual user problems

πŸ”— Connect

Platform Link
πŸ’Ό LinkedIn Sai Narendra
πŸ’» GitHub sai4u-dev
🧠 LeetCode sai4u
🌐 Portfolio sainarendra.onrender.com

Building. Learning. Shipping. Improving. πŸš€

Pinned Loading

  1. cyberhud_command cyberhud_command Public

    High-end gaming platform β€” Single & Multiplayer battle arenas, real-time telemetry, 3D cyber core, Google Maps zones, and role-based command control. Inspired by Awwwards & Framer β€” built with perf…

    JavaScript

  2. Accio-AI-Market Accio-AI-Market Public

    JobPilot - Smart Job Management

    JavaScript

  3. ai-resume-builder ai-resume-builder Public

    An AI-powered resume builder that generates optimized, professional resumes with real-time editing and modern templates.

    JavaScript 1

  4. accio-connect accio-connect Public

    Accio Connect - A platform with connect, share, and post their experiences.

    JavaScript

  5. dsa-mastery dsa-mastery Public

    Mastering Data Structures and Algorithms through structured practice, problem-solving, and detailed notes.

    JavaScript