100 Days of Backend
Job-Ready
Projects
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0/100
All
To Do (100)
Done (0)
001
Todo List API
Beginner
002
Notes App API
Beginner
003
Random Quote API
Beginner
004
Counter API
Beginner
005
Bookmark Manager API
Beginner
006
Simple Contact Book
Beginner
007
Expense Tracker API
Beginner
008
Habit Tracker API
Beginner
009
Recipe API
Beginner
010
Flashcard API
Beginner
011
URL Shortener
Beginner
012
Polling / Voting API
Beginner
013
Journal API
Beginner
014
Library Book Catalog
Beginner
015
Weather Log API
Beginner
016
User Registration + Login
Intermediate
017
Role-Based Access Control
Intermediate
018
Email Verification Flow
Intermediate
019
Password Reset Flow
Intermediate
020
File Upload API
Intermediate
021
Image Resize API
Intermediate
022
CSV Import API
Intermediate
023
Full-Text Search API
Intermediate
024
Tag System
Intermediate
025
Comments System
Intermediate
026
Likes / Reactions API
Intermediate
027
Follow / Unfollow System
Intermediate
028
Activity Feed
Intermediate
029
Notification System
Intermediate
030
Blog API with Drafts
Intermediate
031
Rate Limiter Middleware
Intermediate
032
API Key Auth
Intermediate
033
Webhook Dispatcher
Intermediate
034
Background Job Queue
Intermediate
035
Caching Layer with Redis
Intermediate
036
E-commerce Product Catalog
Intermediate
037
Shopping Cart API
Intermediate
038
Order Management API
Intermediate
039
Inventory Management
Intermediate
040
Stripe Payment Integration
Intermediate
041
Subscription Billing
Advanced
042
Real-Time Chat with WebSockets
Advanced
043
Real-Time Notifications with SSE
Advanced
044
Event-Driven Architecture
Advanced
045
GraphQL API
Advanced
046
REST to GraphQL Migration
Advanced
047
Multi-Tenant SaaS API
Advanced
048
Audit Log API
Advanced
049
CQRS Pattern
Advanced
050
API Versioning Strategy
Advanced
051
Search with Filters + Facets
Advanced
052
Geo-Location API
Advanced
053
Analytics Event Tracker
Advanced
054
Time-Series Data API
Advanced
055
Distributed Rate Limiter
Advanced
056
Circuit Breaker Pattern
Advanced
057
Saga Pattern for Distributed Txns
Advanced
058
Service Mesh with Health Checks
Advanced
059
JWT Refresh Token Rotation
Advanced
060
OAuth2 Provider
Advanced
061
HIPAA-Compliant Data Storage
Advanced
062
Content Moderation API
Advanced
063
AI-Powered Search API
Advanced
064
RAG API (Retrieval-Augmented Gen)
Advanced
065
AI Code Review Bot
Advanced
066
LLM Streaming API
Advanced
067
AI Image Analysis API
Advanced
068
Microservices with API Gateway
Expert
069
Service Discovery
Expert
070
Distributed Tracing
Expert
071
Kubernetes Deployment
Expert
072
CI/CD Pipeline
Expert
073
Database Migration Strategy
Expert
074
Infrastructure as Code
Expert
075
Observability Stack
Expert
076
Load Testing Your API
Expert
077
API Documentation with OpenAPI
Expert
078
Contract Testing
Expert
079
Chaos Engineering
Expert
080
Zero-Downtime Deploy Strategy
Expert
081
End-to-End Test Suite
Expert
082
Feature Flags API
Expert
083
GDPR Compliance API
Expert
084
Penetration Testing Your API
Expert
085
Secrets Management
Expert
086
Multi-Region API Deployment
Expert
087
API Gateway with Custom Plugins
Expert
088
Event Sourcing
Expert
089
gRPC API
Expert
090
WASM Plugin System
Expert
091
Serverless API on AWS Lambda
Expert
092
Idempotency in APIs
Expert
093
Database Sharding
Expert
094
Cache Stampede Prevention
Expert
095
Zero Trust Security Model
Expert
096
Cost-Optimized Architecture Review
Expert
097
API Performance Optimization
Expert
098
Developer Portal with SDK
Expert
099
Architecture Decision Records
Expert
100
Deploy a Full Production App
Expert