Engineering Excellence,
Decades in the Making

Three senior developers, 35+ years of combined experience, one mission: solving complex problems with clean, efficient code.

Deep Technical Expertise,
Practical Solutions

Founded by developers who grew up with code, Renfield Software specializes in enterprise .NET modernization. We don't just write software—we architect systems that last.

From low-level Windows API integration to cloud-native microservices, our team combines old-school engineering rigor with modern development practices.

35+

Years .NET Experience

50+

Enterprise Projects

100%

Remote Capability

24/7

Critical Support

💡

Why "Renfield"?

The name Renfield reflects our philosophy: we are the reliable assistants working behind the scenes to ensure everything runs flawlessly. Like a trusted chief of staff, we handle the complex technical details so your business can focus on what matters most.

Meet the Team

Dedicated developers who thrive on solving complex problems with clean, efficient code.

Marcel Popescu

Marcel Popescu

Development Team Manager

Software developer with over 30 years of experience in programming, currently specializing in .NET and SQL databases. Author of "TDD by Example", a practical guide to test-driven development.

A passionate advocate of automated testing and author of a book on test-driven development.

While capable of developing user interfaces, Marcel's true passion lies in algorithms and data processing. When not writing code, he enjoys fiction and travel.

.NET Architecture TDD SQL Algorithms
Sorin Ceausu

Sorin Ceausu

Senior .NET Developer

Dynamic developer with experience in multiple programming languages. Currently focused on low-level WinForms C# development with direct Windows API integration.

Extensive background in C++ and Assembly language, plus 3D graphics development using DirectX. Coding since age 14, when building a game server sparked a lifelong passion.

WinForms Low-level APIs C++ DirectX
Bogdan Iolu

Bogdan Iolu

Senior .NET Developer

Seasoned developer since 2019, passionate about building and deploying scalable software solutions. Specializes in ASP.NET, .NET Core, AWS, SQL, TypeScript, and Vue.js.

Since joining Renfield, Bogdan has significantly enhanced internal operations and core codebase. Outside coding, he enjoys hiking, swimming, books, and volunteer work.

ASP.NET Core AWS Vue.js Cloud Architecture

Work with experienced engineers

Whether you need a complex migration or a custom solution, we're ready to help.

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