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Pagaar

Integration-First Payroll Engine

A Spring Boot payroll platform demonstrating enterprise payroll processing, attendance management, compensation, and immutable payroll records.

Demonstrates domain-driven design, effective dating, concurrent payroll execution, and enterprise backend architecture.

Java · Spring Boot · PostgreSQL

The problem

Payroll is a high-consequence workflow: calculations must be traceable, corrections must be explicit, and integrations should not make results ambiguous.

Design direction

Pagaar is being designed around clear domain boundaries for attendance, compensation, payroll runs, and employee records. Each payroll result is intended to be immutable so that corrections create an auditable new record rather than silently rewriting history.

What I am exploring

  • Domain-driven boundaries for payroll and attendance
  • PostgreSQL-backed transaction handling
  • An auditable payroll-run lifecycle
  • Integration-friendly APIs for downstream HR systems

Current status

This is an active backend architecture project. The page will evolve with implementation details, decisions, and test evidence as the system is built.