ApexMetrics

AI-Powered Business Intelligence SaaS for Multi-Outlet Retail & Hospitality

Live Platform Repository Discuss Similar Architecture

The Engineering Challenge

Problem Context

Retail and hospitality operators deal with fragmented datasets across accounting systems (QuickBooks, Xero), point-of-sale terminals, and inventory databases. Extracting actionable insights required tedious manual exports, spreadsheets, and delayed reporting.

The Architectural Blueprint

Solution Delivered

Architected an end-to-end multi-tenant platform with automated sync connectors, unified transactional data modeling in PostgreSQL, and an AI-driven insight layer built on FastAPI that generates contextual summaries, sales anomaly notifications, and operational forecasts.

Interactive Architecture & Topology

System Topology & Interaction Flow

ApexMetrics — Production Architecture

Multi-tier Decoupled Flow

Next.js Web Client

SSR & Dynamic Tenant Dashboard

NestJS Core API Gateway

Auth, RBAC, Tenant Routing

Sync Engine Workers

QuickBooks & Xero Ingestion

FastAPI AI Engine

Natural Language Insights & LLM Analysis

PostgreSQL (Multi-tenant)

Tenant-isolated Schemas & Reporting Data

Redis Cache & Queue

Job queue & Session caching

GCP & Terraform IaC

Cloud Run / Compute Engine & VPC

Execution Flow Sequence (6 Steps)

Flow Stage 1

1. Tenant users authenticate via Next.js client with role-based JWT tokens.

Strict multi-tenant security boundary preventing cross-tenant data leaks

Idempotent accounting data synchronization pipelines with error recovery

Decoupled Python analytics backend keeping heavy computational logic outside the primary Node event loop

Leadership & Hands-on Scope

My Engineering Contributions

End-to-end product architecture and technical blueprinting across frontend, backend, and cloud.

Engineered multi-tenant database partitioning and secure organization/tenant isolation.

Developed high-throughput API integrations with QuickBooks Online and Xero accounting platforms.

Built modern, responsive analytics dashboards in Next.js with fine-grained RBAC and Super Admin controls.

Integrated Python/FastAPI microservices for AI-powered business insight extraction and summary generation.

Configured automated container builds, Docker Compose/K8s manifests, GCP cloud deployment, and Terraform IaC.

Platform Features

Multi-tenant architecture with tenant-level data segregation

Bi-directional QuickBooks and Xero accounting integrations

Automated business data synchronization & reconciliation

AI-powered business insight engine and anomaly detection

Executive analytics, gross margin breakdown, and reporting exports

Organization, team role management, and audit logs

Super Admin management portal for platform-level tenancy controls

Complete Tech Stack

Next.jsNestJSFastAPIPythonPostgreSQLDockerGCPTerraformTypeScriptRedisTailwind CSS

Need a similar production-ready system?

I can help architect, build, and deploy your entire application stack — with high availability, modern security, and automated cloud infrastructure.

Get in Touch with Ravi

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