Олесь

OLES OSADCHUK
.NET SOFTWARE DEVELOPER

SUMMARY

.NET Software Engineer with experience building healthcare SaaS and EMR
platforms. Focused on developing scalable backend systems, integrating third-
CONTACT party services, and improving system performance. Skilled in ASP.NET Core,
PostgreSQL, cloud infrastructure, and modern software architecture patterns
[відкрити контакти](див. вище в блоці «контактна інформація»)
such as CQRS and Modular Monoliths. Experienced working in Agile teams,
building clean and maintainable code, and solving complex technical problems.
[відкрити контакти](див. вище в блоці «контактна інформація»)

Lviv, Ukraine EXPERIENCE
[відкрити контакти](див. вище в блоці «контактна інформація»)
n/olesnesobachka/ B2B Healthcare SaaS / Modular Monolith ERP for 2025 - PRESENT
Hospitals
SKILLS Responsibilities:
Developed a scalable healthcare ERP system using Modular Monolith
C# / .NET / ASP.NET Core architecture.
REST API Development Built and maintained multiple backend modules using ASP.NET Core and
PostgreSQL / MS SQL.
Entity Framework Core Used PostgreSQL JSON columns to support flexible medical data storage.
PostgreSQL & MS SQL Configured CI/CD pipelines in Azure for automated deployments.
Migrated infrastructure from Azure to IBM Cloud using Terraform.
SignalR & Redis
Built a custom Service Broker for managing IBM Orchestrate agents and
Azure, IBM Cloud & Terraform integrations.
Implemented JWT authentication and role/permission-based authorization with
CI/CD Pipelines
IdentityServer.
OOP & SOLID Principles Integrated Elasticsearch for fast and advanced data searching.
Modular Monolith & CQRS Improved performance using CQRS, SignalR, and Redis caching.
Wrote integration tests to ensure system stability and reliable module
Architecture communication.
JWT Authentication &
Authorization Tools & Technologies:

Unit Testing ASP.NET Core (.NET), PostgreSQL, Entity Framework Core, Modular Monolith
architecture, Azure CI/CD, IBM Cloud, Terraform, Elasticsearch, MediatR (CQRS),
SignalR, Redis, Identity Server, Integration Testing

LANGUAGES

Ukrainian Healthcare & EMR Platform 2024 - 2025
English (B2)
Responsibilities:
 Developed and maintained an Electronic Medical Records (EMR) platform for
clinics and patient management.
Implemented Stripe payment processing and webhook handling.
Integrated DoseSpot API for doctor verification and e-prescriptions.
Built a microservice for integrating IBM Watsonx AI agents.
Refactored legacy code using CQRS, SOLID principles, and custom
middleware.
Created reusable NuGet packages to simplify shared business logic.
Improved application performance with Redis caching and SignalR
notifications.
Configured JWT authentication and authorization with IdentityServer.
Increased code reliability by writing Unit tests with NUnit and Moq.

Tools & Technologies:

ASP.NET Core (.NET), MS SQL Server, Entity Framework Core, MediatR (CQRS),
SignalR, Redis, Identity Server, Stripe API, DoseSpot API, Webhooks, NuGet, NUnit,
Moq

EDUCATION

Master of Computer Science 2025 - PRESENT
National Forestry University Of Ukraine

Bachelor of Computer Science 2021 - 2025
National Forestry University Of Ukraine