Jérôme Stéphan - Senior .NET Developer specialized in high-traffic websites

Jérôme StéphanSenior .NET/C# Developer

Based in Pucón–Villarrica (Chile) • 25+ yrs experience • High-traffic specialist • Available worldwide

.NET Core C# SQL Server High-Traffic Sites ASP.NET OpenAI

Robust websites & platforms for high traffic

I build and maintain business websites and custom platforms in .NET/C#, optimized to handle high-traffic volumes. Expert in SQL Server, scalable architecture, and performance optimization. French-born, trained in France, living in Chile for 10+ years. Available for USA, Europe and international projects.

Strengths

.NET/C# specialist with 25+ years of experience
Expert in high-traffic websites and scalable architecture
Advanced SQL Server (design, performance, security, large volumes)
Performance optimization and Core Web Vitals
OpenAI integrations (applied AI, content generation)
Experience with robust enterprise platforms
IIS hosting + production monitoring

Services

High-traffic website development
Scalable enterprise platforms
.NET and SQL Server performance optimization
API and integrations (payments, AI, external services)
Legacy system migration and modernization
Performance and architecture auditing
Production support and maintenance

Stack & integrations

.NET Core / .NET Framework • C# • ASP.NET Core & WebForms
SQL Server (high performance, partitioning, replication)
Entity Framework • Dapper • LINQ • Optimized Stored Procedures
IIS • Windows Server • Load Balancing • Caching
REST API • Background Services • Message Queues
OpenAI API • Python • Embeddings
HTML • CSS • JavaScript • Performance optimization

About

French-born, trained in France • 10+ years in Chile
Based between Pucón & Villarrica
Available for projects in Chile, USA and Europe
Remote work + available for on-site visits
Fluent communication in Spanish, English and French
Results and deadline oriented
© 2026 Jérôme StéphanAvailable in French, Spanish and English. Based in Pucón–Villarrica, Chile.