100 backend projects to be completed within 100 days
| # | Category | Project Idea | 🎯 Difficulty | 🧱 Stack | ✅ Status |
|---|---|---|---|---|---|
| 1 | 🔰 Beginner | To-do List API | Easy | Node.js | ✅Done |
| 2 | 🔰 Beginner | Calculator API | Easy | Node.js | ✅Done |
| 3 | 🔰 Beginner | Weather Info API (mock) | Easy | Node.js | ✅Done |
| 4 | 🔰 Beginner | Quotes API | Easy | Node.js | ✅Done |
| 5 | 🔰 Beginner | Currency Converter API (static) | Easy | Node.js | ✅Done |
| 6 | 🔰 Beginner | User Registration/Login (no DB) | Easy | Node.js | ✅Done |
| 7 | 🔰 Beginner | Form Submission Handler | Easy | Node.js | ✅Done |
| 8 | 🔰 Beginner | Palindrome Checker API | Easy | Node.js | ✅Done |
| 9 | 🔰 Beginner | Notes API (in-memory CRUD) | Easy | Node.js | ✅Done |
| 10 | 🔰 Beginner | Basic Blog API (posts only) | Easy | Node.js | ✅Done |
| 11 | 🔰 Beginner | Mock E-commerce Products API | Easy | Node.js | ✅Done |
| 12 | 🔰 Beginner | IP Lookup Service | Easy | Node.js | ✅Done |
| 13 | 🔰 Beginner | Contact Form Email Sender (NodeMailer) | Easy | Node.js | ✅Done |
| 14 | 🔰 Beginner | BMI Calculator API | Easy | Node.js | ✅Done |
| 15 | 🔰 Beginner | Markdown to HTML Converter | Easy | Node.js | ✅Done |
| 16 | 🔰 Beginner | Simple URL Shortener (in-memory) | Easy | Node.js | ✅Done |
| 17 | 🔰 Beginner | Local Storage with FileSystem (JSON DB) | Easy | Node.js | ✅Done |
| 18 | 🔰 Beginner | REST Countries API Clone | Easy | Node.js | ✅Done |
| 19 | 🔐 Authentication | JWT Auth API | Medium | Node.js/JWT | ✅Done |
| 20 | 🔐 Authentication | Session-Based Auth | Medium | Node.js/Express | ✅Done |
| 21 | 🔐 Authentication | OAuth Login (Google, GitHub) | Medium | Node.js/OAuth2 | ✅Done |
| 22 | 🔐 Authentication | Password Reset via Email | Medium | Node.js/Nodemailer | ✅Done |
| 23 | 🔐 Authentication | 2FA Implementation | Hard | Node.js/TOTP | ✅Done |
| 24 | 🔐 Authentication | Role-Based Access Control | Medium | Node.js | ✅Done |
| 25 | 🔐 Authentication | Admin Dashboard API | Medium | Node.js | ✅Done |
| 26 | 🔐 Authentication | User Activity Logging | Medium | Node.js | ✅Done |
| 27 | 🔐 Authentication | Account Verification with OTP | Medium | Node.js | ✅Done |
| 28 | 🔐 Authentication | Social Login Integration | Hard | Node.js/OAuth2 | ✅Done |
| 29 | 🔐 Authentication | Multi-Tenant Auth System | Hard | Node.js | ✅Done |
| 30 | 🔐 Authentication | Rate Limiting per User/IP | Medium | Node.js | ✅Done |
| 31 | 🔐 Authentication | Account Deletion Endpoint | Easy | Node.js | ✅Done |
| 32 | 🔐 Authentication | Single Sign-On (SSO) Stub | Hard | Node.js | ✅Done |
| 33 | 🔐 Authentication | Auth Middleware Package (npm/pip) | Hard | Node.js/npm | ✅Done |
| 34 | 📦 CRUD | Library API (Books, Authors) | Medium | Node.js/PostgreSQL | ✅Done |
| 35 | 📦 CRUD | Movie/TV Show DB | Medium | Node.js/MongoDB | ✅Done |
| 36 | 📦 CRUD | Fitness Tracker (workouts, calories) | Medium | Node.js/PostgreSQL | ✅Done |
| 37 | 📦 CRUD | Habit Tracker API | Medium | Node.js/PostgreSQL | ✅Done |
| 38 | 📦 CRUD | Recipe Manager | Medium | Node.js/PostgreSQL | ✅Done |
| 39 | 📦 CRUD | Inventory System | Medium | Node.js/PostgreSQL | ✅Done |
| 40 | 📦 CRUD | Music Playlist API | Medium | Node.js/PostgreSQL | ✅Done |
| 41 | 📦 CRUD | Book Lending System | Medium | Node.js/PostgreSQL | ✅Done |
| 42 | 📦 CRUD | Blog + Comments System | Medium | Node.js/PostgreSQL | ✅Done |
| 43 | 📦 CRUD | Bookmark Manager | Medium | Node.js/PostgreSQL | ✅Done |
| 44 | 📦 CRUD | Resume Builder API | Medium | Node.js/PostgreSQL | ✅Done |
| 45 | 📦 CRUD | Client-Project Tracker | Medium | Node.js/PostgreSQL | ✅Done |
| 46 | 📦 CRUD | Student Management System | Medium | Node.js/PostgreSQL | ✅Done |
| 47 | 📦 CRUD | Travel Bucket List API | Medium | Node.js/PostgreSQL | ✅Done |
| 48 | 📦 CRUD | Learning Path Tracker | Medium | Node.js/PostgreSQL | ✅Done |
| 49 | 🧠 Intermediate | Chat App Backend (Socket.IO / WebSocket) | Medium | Node.js/Socket.IO | ✅Done |
| 50 | 🧠 Intermediate | Quiz App API | Medium | Node.js | ✅Done |
| 51 | 🧠 Intermediate | Live Polling API | Medium | Node.js | ✅Done |
| 52 | 🧠 Intermediate | Expense Tracker | Medium | Node.js | ✅Done |
| 53 | 🧠 Intermediate | Notification Service | Medium | Node.js | ✅Done |
| 54 | 🧠 Intermediate | Real-time Voting System | Medium | Node.js | ✅Done |
| 55 | 🧠 Intermediate | Image Upload + Cloud Storage (e.g., S3) | Medium | Node.js/AWS S3 | ✅Done |
| 56 | 🧠 Intermediate | Rate Limiting Middleware | Medium | Node.js | ✅Done |
| 57 | 🧠 Intermediate | GraphQL Blog API | Medium | Node.js/GraphQL | ✅Done |
| 58 | 🧠 Intermediate | Payment Gateway Integration (Stripe) | Medium | Node.js/Stripe | ✅Done |
| 59 | 🧠 Intermediate | GitHub Activity Tracker | Medium | Node.js/GitHub API | ✅Done |
| 60 | 🧠 Intermediate | Webhook Receiver | Medium | Node.js | ✅Done |
| 61 | 🧠 Intermediate | Custom API Gateway | Medium | Node.js | ✅Done |
| 63 | 🧠 Intermediate | Analytics Tracker API | Medium | Node.js | ✅Done |
| 64 | 🧠 Intermediate | Collaborative Notes API | Medium | Node.js | ✅Done |
| 65 | 🧠 Intermediate | File Compression API | Medium | Node.js | ✅Done |
| 66 | 🧠 Intermediate | Geo-location Tracker | Medium | Node.js | ✅Done |
| 67 | 🧠 Intermediate | Task Queue with Redis + Bull | Medium | Node.js/Redis | ✅Done |
| 68 | 🧠 Intermediate | Scheduler Service (Cron API) | Medium | Node.js | ✅Done |
| 69 | 🚀 Advanced | CI/CD Service (GitHub Webhook Trigger) | Hard | Node.js | ✅Done |
| 70 | 🚀 Advanced | Chatbot Backend (rule-based or AI integration) | Hard | Node.js | ✅Done |
| 71 | 🚀 Advanced | Multi-user Document Editor (real-time) | Hard | Node.js | ✅Done |
| 72 | 🚀 Advanced | API Rate Limiting as a Service | Hard | Node.js | ✅Done |
| 73 | 🚀 Advanced | Custom OAuth2 Provider | Hard | Node.js | ✅Done |
| 74 | 🚀 Advanced | SaaS Subscription Billing | Hard | Node.js | ✅Done |
| 75 | 🚀 Advanced | Video Upload and Streaming Backend | Hard | Node.js | ✅Done |
| 76 | 🚀 Advanced | API Monitoring Tool | Hard | Node.js | ✅Done |
| 77 | 🚀 Advanced | Headless CMS | Hard | Node.js | ✅Done |
| 78 | 🚀 Advanced | Forum Backend (Threads, Replies, Moderation) | Hard | Node.js | ✅Done |
| 79 | 🚀 Advanced | E-commerce Backend with Cart, Checkout | Hard | Node.js | ✅Done |
| 80 | 🚀 Advanced | Microservice Starter Template | Hard | Node.js | ✅Done |
| 81 | 🚀 Advanced | GraphQL API Gateway | Hard | Node.js/GraphQL | ✅Done |
| 82 | 🚀 Advanced | Private File Sharing API with Tokens | Hard | Node.js | ✅Done |
| 83 | 🚀 Advanced | Multi-Region Failover (simulate) | Hard | Node.js | ✅Done |
| 84 | 🛠️ DevOps | Mock API Generator | Hard | Node.js | ✅Done |
| 85 | 🛠️ DevOps | Postman Collection Generator | Hard | Node.js | ✅Done |
| 86 | 🛠️ DevOps | API Doc Generator from Code | Hard | Node.js | ✅Done |
| 87 | 🛠️ DevOps | Load Testing Tool (like Apache Bench) | Hard | Node.js | ✅Done |
| 88 | 🛠️ DevOps | Log Aggregator Service | Hard | Node.js | ✅Done |
| 89 | 🛠️ DevOps | User Agent Parser | Hard | Node.js | ✅Done |
| 90 | 🛠️ DevOps | Schema Validator API | Hard | Node.js | ✅Done |
| 91 | 🛠️ DevOps | API Health Checker | Hard | Node.js | ✅Done |
| 92 | 🛠️ DevOps | Dev Metrics Dashboard | Hard | Node.js | ✅Done |
| 93 | 🛠️ DevOps | Secure Secret Store API | Hard | Node.js | ✅Done |
| 94 | 🌐 Deployment | Dockerize All Projects | Hard | Node.js/Docker | ✅Done |
| 95 | 🌐 Deployment | Kubernetes-ready Deployment Configs | Hard | Node.js/Kubernetes | ✅Done |
| 96 | 🌐 Deployment | GitHub Actions for CI/CD | Hard | Node.js/GitHub | ✅Done |
| 97 | 🌐 Deployment | Logging with ELK Stack | Hard | Node.js/ELK Stack | ✅Done |
| 98 | 🌐 Deployment | Infrastructure-as-Code (Terraform) for One Project | Hard | Node.js/Terraform | ✅Done |
| 99 | 🌐 Deployment | Monitoring with Prometheus + Grafana | Hard | Node.js/Prometheus | ✅Done |
| 100 | 🧠 AI/ML Integration | AI-Powered Resume Matcher (Job vs Resume) | Hard | Node.js/GEMINI AI | ✅Done |