Enterprise HR & Workforce Management System
Full-Stack Enterprise Human Capital, Attendance & Payroll Dashboard
A scalable corporate HRMS web and mobile ecosystem that centralizes workforce administration, biometric and geofenced attendance tracking, dynamic shift scheduling, leave approval matrices, 360 performance reviews, and automated payroll computations.
Key Verified Outcomes & Results
A mid-sized enterprise with 1,200+ employees across 5 branches suffered from fragmented HR spreadsheets, manual biometric clock-in reconciliations, slow leave approval cycles, and frequent payroll calculation discrepancies.
Architected a unified Full-Stack HRMS using Next.js, React, Node.js, and MySQL. Features granular Role-Based Access Control (RBAC), multi-tier manager approval workflows, automated overtime and tax calculation engines, and interactive organizational charts.
Layered MVC + REST API Architecture + Modular Component Design
The React/Next.js frontend connects via secure HTTP-only cookies and JWT tokens to an Express.js API gateway. Middleware validates user permissions via an optimized bitmask RBAC engine before delegating to modular business services backed by indexed MySQL relational schemas.
1. Next.js Admin Dashboard
HR manager accesses real-time workforce metrics and approval queues.
2. Express.js API Gateway
Validates JWT session, rate limits, and applies department permission masks.
3. Payroll & Attendance Service
Processes clock-in logs and executes salary arithmetic within ACID transactions.
4. MySQL Relational DB
Persists records across normalized tables with automated audit trail logging.
Core Engineering Features & Capabilities
Complex Engineering Challenges & Technical Solutions
Challenge #1Complex Multi-Jurisdiction Payroll & Tax Calculation Rules
Calculating variable tax brackets, provident funds, overtime multipliers, and leave deductions for 1,200+ employees produced edge-case rounding errors.
Developed a declarative rule-engine parser with integer-based precision arithmetic (cents/paise) and built comprehensive unit test suites covering 200+ tax calculation scenarios.
Challenge #2High-Concurrency Biometric Clock-in Spikes
Hundreds of employees punching in simultaneously at 9:00 AM caused MySQL connection bottlenecks.
Implemented a Redis queue buffer that absorbs punch requests instantaneously and asynchronously flushes batches to MySQL in optimized bulk inserts.
Complete Technology & Tooling Stack
Key Architectural Takeaways
- Relational integrity and database constraints (foreign keys, check constraints) are invaluable for financial and HR data.
- Decoupling high-frequency data ingestion (clock-ins) from relational writes using Redis prevents database lock contention.