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Mursel Koseer

@murselkoseer

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Founder and freelance developer at Kosify; built a C# inventory system that was sold to another party.

Belgium

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At Kosify, I developed a C# and .NET inventory management system from concept to completed product, which was later sold to another party. I also built API integrations and Shopify functionality, including a .NET API that sends Active FiberShake quiz data to Klaviyo.

At BlueIT, I managed and implemented the Gluu IAM platform, integrating it into two applications with single sign-on and federated identities. Earlier, as a Software Developer Intern at Entelec, I created C# tools for Sky-Walker data conversion and migration.

Experience

Work history, roles, and key accomplishments

Current

Founder / Freelance Web & Software Developer

Current

Kosify

Aug 2025 - Present (1 year 2 months)

Founded Kosify and developed custom software, API integrations, and Shopify solutions. Built an inventory management system, a .NET API for marketing automation, and a reservation system for a restaurant.

C#Net 7 Blazor .NET 8.0 PostgreSQL Auth0 Serilog Docker Redis Shopify Liquid JavaScript HTML CSS

Backend Developer

BlueIT

Apr 2024 - Apr 2025 (1 year)

Managed and implemented the Gluu IAM platform for secure authentication and authorization, including SSO and federated identities. Refactored an application to Clean Architecture to improve maintainability and scalability.

C#.NET OAuth OpenID Connect SAML 2.0 WebAuthn MFA LDAP SCIM Jython Clean Architecture

.NET Consultant (IBO Training)

AllPhi

Sep 2023 - Dec 2023 (3 months)

Developed a Fleet Management System for companies, implementing best practices and optimizing performance. Used Clean Architecture and various technologies to provide complete management control over vehicles, fuel cards, drivers, and maintenance.

.NET Core C#Web APIs Angular Blazor SQL Server Entity Framework Core Dapper Identity Server CQRS OAuth 2 Repository Pattern Unit Testing AutoMapper SignalR Fluent Validation Logging

Software Developer (Intern)

Entelec

Nov 2022 - Jun 2023 (7 months)

Developed data conversion and integration tools for Sky-Walker using C# and GMap.NET in WPF, improving information updates by 50%. Created an error-handling tool for data migration, increasing migration efficiency by 60%.

C#GMap.Net WPF Microsoft SQL Server Data Migration

Education

Degrees, certifications, and relevant coursework

Hogeschool PXL

Associate Degree, Programming

2021 - 2023

Grade: 78.75%

Activities and societies: Led a team as Scrum Master in developing Chrono Coast, a luxury watch webshop, and developed Maverz, a money-saving student app using .NET MAUI.

Associate Degree in Programming with specialties in front and back-end development, cybersecurity, and project management. Passed with high distinction at 78.75%.