Julien Schneider

.NET C# Back-End Developer | Expert in SaaS & Enterprise Solutions (15 years of experience)

I help SaaS, fintech, and SME companies build robust, scalable, and secure back-ends in C# and .NET that accelerate their growth while reducing technical debt and maintenance costs.

With 15 years of experience, including several years in fintech, I have notably:

Designed and developed a SaaS appointment booking platform (like Doctolib) managing several thousand simultaneous users, with high-performance APIs and optimized architecture.

Created a SaaS dedicated to beauty professionals (hairdressers, estheticians) that significantly improved their productivity through seamless management of schedules, clients, and payments.

My experience with institutions like Crédit Mutuel has allowed me to master the security, GDPR compliance, and high availability standards required by financial and critical systems.

My main stack:

C# – .NET 8 / .NET 9 / .NET 10

ASP.NET Core, Entity Framework, SQL Server

Azure, Microservices, Clean Architecture

REST API, performance, and code optimization

I deliver well-documented, tested, and maintainable solutions, tailored to real business needs.

Whether for scratch development, evolution of an existing platform, or legacy migration, I am committed to respecting deadlines while ensuring quality and performance.

Immediately available for remote or hybrid missions (France / remote).

Daily rate: €450/day (adjustable based on duration, scope, and complexity of the mission).

Do you have a SaaS project, a custom web application, or a .NET back-end need?

Contact me, let's chat for 15 minutes to see how I can concretely help you.