Professional Domain Experience
Healthcare Management System
Enterprise healthcare platform work — patient management, appointments, billing, and clinical modules.
- ASP.NET Core
- ASP.NET Core Web API
- Angular
- SQL Server
- Entity Framework Core
- REST APIs
Transparency note: This case study represents professional domain experience. The employer's codebase, clients, and internal details are confidential, so what is described here is the engineering approach and module architecture — not a public demo, and no client names, deployment counts, or usage figures are claimed.
Overview
A case study drawn from my professional work on healthcare web applications at Microkosm. Hospital-grade systems bring together many interdependent modules — patients, appointments, billing, laboratory, pharmacy, HR, and reporting — all backed by a carefully designed relational schema and secure APIs.
The problem
Healthcare workflows are deeply interconnected: a single patient visit can touch scheduling, clinical records, laboratory orders, pharmacy dispensing, and billing. Systems in this domain must enforce strict access control, keep financial and clinical data consistent under concurrent use, and stay responsive as record volumes grow.
The solution
A modular architecture built on ASP.NET Core Web API and Angular, with each functional area exposed through well-defined REST endpoints over a normalized SQL Server schema. Role-based authorization gates every endpoint, database transactions protect multi-step clinical and billing operations, and stored procedures with tuned indexes keep frequently used queries fast.
System architecture
Angular Frontend
Module-per-domain SPA with guarded routes
ASP.NET Core Web API
REST endpoints with JWT + role authorization
Service Layer
Domain logic, validation, transaction boundaries
EF Core + Stored Procedures
Data access, migrations, tuned queries
SQL Server
Normalized schema, indexes, constraints
Architecture
Angular single-page frontend consuming a layered ASP.NET Core Web API — controllers delegating to services, services to EF Core repositories — over a normalized SQL Server schema with stored procedures for reporting-heavy paths.
Key features
- Patient registration and longitudinal record management
- Appointment scheduling and visit workflows
- Billing tied to services, procedures, and payments
- Laboratory order and result tracking
- Pharmacy and inventory-related workflows
- HR and finance modules for hospital operations
- Reporting and analytics views for administrators
- Role-based access for doctors, staff, and administrators
System modules
- Patient Management
- Appointments
- Billing
- Laboratory
- Pharmacy
- HR
- Finance
- Reporting
- Analytics
My contribution
- Develop and maintain healthcare application features across the full stack
- Design secure RESTful endpoints with role-based authorization
- Work on database schema design, stored procedures, and query optimization
- Build responsive Angular interfaces for clinical and administrative workflows
Technical challenges
Data consistency across modules
A billing entry, an appointment, and a clinical record may all change in one workflow. Wrapping multi-step operations in explicit database transactions keeps them atomic — either the whole workflow commits or none of it does.
Fine-grained access control
Different roles see very different slices of the same data. Policy-based authorization in ASP.NET Core, applied per endpoint and enforced again at the query level, keeps access rules in one place instead of scattered through UI code.
Query performance at scale
Record-heavy screens like patient history and financial reports need careful indexing and, in some paths, stored procedures — profiling execution plans is part of the normal workflow.
Outcome
Ongoing professional work that shapes how I design schemas, secure APIs, and structure enterprise Angular applications. The module architecture shown here reflects the real complexity of the healthcare domain I work in daily.