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RROEI/TECH
PROJECT / 01 · SAAS PLATFORM

A modern HRIS built for growing teams — from records to payroll in one system.

A human resources information system replacing scattered spreadsheets, PDFs and payroll add-ons with one typed platform.

CLIENT
HREZ
YEAR
2025
INDUSTRY
SaaS · HR Tech
STATUS
In production
manual HR hours
-72%
tools replaced
3
uptime
99.98%
PROBLEM

Fast-growing SMBs were running HR out of spreadsheets, shared drives and legacy payroll tools. Employee records, leave, attendance and payroll lived in four different places, with no single source of truth for people data.

SOLUTION

HREZ unifies employee records, org structure, attendance, leave, performance and payroll under a single multi-tenant SaaS platform. Every entity is typed and event-sourced, so audits, exports and integrations reuse the same contracts.

ARCHITECTURE
  • Next.js App Router · React Server Components · TypeScript
  • PostgreSQL · row-level security per tenant
  • Background jobs on a durable queue for payroll runs and attendance rollups
  • Role-based access with policy checks at the query layer
  • Audit log on every mutation · exportable to CSV or S3
Next.jsTypeScriptPostgreSQLPrismaTailwindAWS
OPERATING FLOW
01
Onboard
02
Contract
03
Attendance
04
Leave
05
Performance
06
Payroll
07
Report
MODULES

The system, module by module.

01

Employee records

Contracts, documents, compensation history and org placement — versioned end to end.

02

Attendance & leave

Policies, accruals, approvals and calendar sync across teams and regions.

03

Payroll runs

Deterministic payroll with previews, approvals, and downloadable pay slips.

04

Performance

Cycles, reviews and 1:1 notes attached to the employee timeline.

OUTCOME

Onboarded pilot customers in weeks rather than quarters, replacing three tools per tenant. Payroll runs that took HR teams days now complete in a single afternoon.

ProductDesignEngineeringInfrastructure