1) Front End (Client-Side)
- Focuses on what users see and interact with.
- Technologies: HTML, CSS, JavaScript
- Frameworks/Libraries: React, Angular, Vue
- Responsibilities: UI/UX implementation, responsiveness, accessibility, performance optimization, state management, API consumption
2) Back End (Server-Side)
- Handles business logic and data processing.
- Languages & Frameworks: Node.js (Express/Nest), Python (Django/FastAPI), Java (Spring Boot), PHP (Laravel)
- Responsibilities: API design, authentication/authorization, validation, integrations, scalability, logging
3) Database Layer
- Stores and retrieves application data.
- Relational: MySQL, PostgreSQL
- NoSQL: MongoDB, Redis
- Responsibilities: Data modeling, indexing, migrations, performance tuning, backups
4) APIs & Integrations
- Connects front end with back end and third-party services.
- Types: REST, GraphQL
- Integrations: Payment gateways, email/SMS, analytics, CRM, ERP
- Faster delivery: One cohesive workflow from UI to production
- Cost efficiency: Reduced handoffs and rework
- Better product quality: Holistic understanding of system constraints
- Scalability: Architected with growth in mind
E-commerce applications
Mobile apps with backend services
Enterprise systems (CRM, ERP, Billing)