Spring Boot & React Enterprise HRMS & Payroll Cloud
Candidate Portfolio Role: Backend & Payroll Systems Architect
Comprehensive multi-tenant human resource management and automated payroll ledger processing cloud. Architected with Spring Boot 3.3, Java 21 Virtual Threads, Kafka event streams, and PostgreSQL Row-Level Security.
Industry Problem Statement & Production Scope
Enterprises require tamper-evident payroll calculation, tax withholding compliant with Indian Income Tax Act 1961, automated direct bank disbursement webhooks, and sub-50ms attendance biometric ingestion.
⚡ Live Distributed Service Topology
All Nodes Reporting NominalAPI Gateway (Spring Cloud)
HTTPS / RESTRate limiting (Redis Token Bucket), JWT verification, and SSL termination.
Employee Lifecycle Service
gRPC / JSONOnboarding, departmental hierarchies, and role-based access control.
Attendance Ingestion (Kafka)
Event StreamConsumes biometric logs at 5,000 events/sec into Redis sliding-window accumulators.
Payroll Ledger Calculation Engine
Internal WorkerDeterministic multi-tier tax computations, provident fund deductions, and ledger balances.
Bank Disbursement Webhook Service
mTLS / WebhookIdempotent dispatch to NEFT/RTGS payment gateway endpoints.
📡 Simulated Gateway Ingress Endpoints
Live Response Payload Previews{
"status": "COMPLETED",
"payroll_cycle": "2026-10",
"tenant_id": "TENANT_CORP_001",
"employees_processed": 1420,
"total_gross_inr": 92300000,
"total_deductions_inr": 18460000,
"net_disbursement_inr": 73840000,
"tax_filing_hash": "sha256:d8a9f4c3e2b1098472a...",
"calculated_at": "2026-10-18T10:30:00Z"
}{
"employee_id": "emp_88219",
"month": "2026-10",
"total_working_days": 22,
"days_present": 21.5,
"overtime_hours": 6.2,
"biometric_compliance_pct": 98.4,
"status": "APPROVED_FOR_PAYROLL"
}🗄️ Relational Data Models & Storage Architecture
| Entity / Table | Key Attributes & Schema | Architectural Purpose |
|---|---|---|
| tenants | id, domain, company_name, gst_tin, created_at | Multi-tenant organization boundary and billing settings. |
| employees | id, tenant_id, pan_hash, designation, ctc_annual, rls_scope | Personnel master encrypted with PostgreSQL RLS security. |
| payroll_records | id, employee_id, cycle, gross, tds, pf, net, status, tx_hash | Audit-trailed immutable wage disbursement ledger. |
| biometric_punches | id, employee_id, punch_time, device_id, verification_method | Raw high-frequency timekeeping events. |
Enterprise capstones, 100+ tests/topic, & real-time voice viva defense.
Sec 10A IT Act legal agreement: placed at ₹7–₹36 LPA or 100% refund.
Zero salary cuts. Say no to predatory 17–25% ISA income deductions.
Direct hiring pipelines to MAANG, Tier-1 MNCs, and product tech unicorns.
Download Complete Capstone Starter Kit
Contains complete Docker Compose orchestrations, database seed migrations, CI/CD pipeline declarations, Postman/Swagger API collections, and step-by-step developer deployment guide.
💬 Technical Interview Defense & Capstone FAQs
Hiring Manager Evaluation CriteriaMaster Full-Stack Engineering with India's #1 IT Training Institute
Gain hands-on experience building production systems like Spring Boot & React Enterprise HRMS & Payroll Cloud. Backed by our legally binding Section 10A IT Act Placement Covenant: secure an engineering role offering ₹7 LPA to ₹36 LPA, or receive a 100% complete fees refund.