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Project

Payroll System

Automated payroll platform handling salary calculation, tax compliance and benefits, with date-effective rules so re-running a past month stays reproducible.

React
Node.js
Database
Payments
Tax Compliance
HR
Automated salary computation and tax deductionsDirect bank transfers with payment trackingTax compliance and automatic filingEmployee payslip generation and portal

500+

Employees Paid

100%

Tax Compliant

Zero

Manual Effort

01 // Overview

Automated Payroll Platform

A comprehensive payroll management system that automates the entire salary payment process - from computing gross pay and deductions to processing bank transfers and generating payslips. Built for accuracy, compliance, and efficiency.

Salary Calculations

Automatic gross-to-net pay computation with overtime, bonuses, deductions, and benefits factored in.

Tax Handling

Compliant tax calculations, income tax withholding, and automated filing with government authorities.

Payment Processing

Direct bank transfers with transaction records, payment confirmations, and automated payroll scheduling.

02 // Features

Platform Capabilities

Payslip Generation

Automatic payslip creation and distribution to employees via email or self-service portal.

Compliance Reports

Generate tax reports, payroll summaries, and audit documentation for regulatory compliance.

Employee Self-Service

Employee portal to view payslips, tax documents, and update personal information independently.

Engineering

The Decisions Behind It.

What made this hard?

Payroll has no tolerance for error. Tax rules change every year, and a single calculation mistake affects every employee at once.

How was the system structured?

The calculation engine is fully separated from I/O: it takes inputs and returns a breakdown, knowing nothing about the database or the UI. Tax and benefit rules are stored with effective dates, so re-running a previous month applies the historically correct rules.

What does the codebase look like now?

Each payslip stores its full calculation breakdown, not just the final amount, which is what makes disputes and audits tractable. The engine's test cases are built from real scenarios and act as the safety net when rules change.

All engineering case studies