Software Development Lifecycle (SDLC): End-to-End Overview

What is Low-Level Design?

Low-Level Design (LLD) provides detailed technical implementation of each component defined in the HLD.

While HLD shows modules, LLD shows classes, methods, database queries, and logic.

Components of LLD

• Class diagrams
• Database schema
• API endpoints
• Pseudocode or algorithms
• Method definitions
• Data structures

Who writes LLD?

1. Senior Developers

2. Technical Leads

3. Software Architects

Why LLD is Important?

Developers clearly understand implementation

Consistent coding structure

Reduced coding errors

Easier maintenance