03 / Case Study
Business Workflow & ERP System
Internal Business Management Platform
A centralized web application for managing users, tasks, records and operational business workflows.
- Source
- Private production project
- Focus
- Node.js · Express · MySQL
Overview
An internal web application that represented business processes as database entities, relationships, permissions, API endpoints, user workflows and reporting structures. The most valuable part of the work was translating how the business actually operated into software structure.
Problem
Operational records and business processes were difficult to track consistently across users and workflows.
- Records lived in inconsistent places and formats
- Users needed different permissions over the same workflows
- Tasks and operational state were hard to follow over time
- Reporting depended on data that was not modeled as first-class entities
Constraints
- Multiple users with different roles
- Business rules that had to be reflected in data, not only in the UI
- Need for a stable API over relational records
- Validation and error handling around real operational input
Solution
Modeled the business as relational entities and relationships rather than a collection of disconnected screens.
Exposed those entities through a REST API with authentication, authorization and validation.
Represented workflow state, role relationships, permissions and reporting needs in the application structure.
Architecture
Users / Roles
Web application
REST API
auth · authorization · validation
Entities
Workflow state
Permissions
MySQL
records · relationships · reporting
Technical Decisions
Why start from the data model?
The product only worked if the database represented how the business actually operated, including entities, relationships, workflow state and reporting needs, rather than treating CRUD screens as the design.
Why authentication and authorization at the API?
Multiple users needed different access to the same records. Permissions belonged with the backend, not only in the interface.
Why a REST API over the relational store?
The web application needed a clear contract for users, tasks, records and reports. An API made those operations explicit and reusable.
Reliability / Failure Handling
- Input validation around operational records
- Error handling on API boundaries
- Role-based access so users could not act outside their workflow
Result
The application became a centralized place to manage users, tasks, records and operational workflows instead of tracking them inconsistently across people and tools.
What I Learned
The useful skill was moving from “this is how the business works” to “this is how the database, API and application should represent it.”
Related Technologies
Source availability
Private production project. Source code unavailable.