Core HR System for Bank

Problem

The client's legacy HR system was struggling with performance issues as the company grew to 10,000+ employees. Database queries were taking up to 30 seconds for complex reports, and the system couldn't handle concurrent users effectively.

Solution

I redesigned the database schema with proper indexing and normalization, implemented query optimization techniques, and introduced a caching layer for frequently accessed data. The architecture was refactored to use a microservices approach for better scalability.

Technical Diagram

Impact

• Reduced query response time by 40%
• Improved system uptime from 98.5% to 99.9%
• Enabled handling of 500+ concurrent users
• Decreased infrastructure costs by 25%