Nicolas

.NET Full Stack Developer

Design and development of enterprise accounting software serving high-volume financial data in production environments, with strict requirements around data integrity, traceability, and reliability.. Backend development in C# with .NET Framework 4.5.2 and Entity Framework 6 — building business logic, validations, and secure REST API endpoints with JWT authentication and role-based authorization.. SQL Server performance optimization: diagnosing slow queries with Execution Plans, designing indexing strategies to replace Table Scans with Index Seeks, and implementing ACID-compliant transactions for critical financial operations.. Frontend development in Angular (v12 → v17 migration in progress): component architecture, service integration, route guards, HTTP interceptors, and reactive state management with RxJS.. MongoDB integration for document storage (invoice attachments and user profiles), applying polyglot persistence principles alongside SQL Server.. CI/CD pipeline management via Azure DevOps with YAML pipelines — MSBuild for .NET backend and Node.js/npm for Angular frontend builds, with PowerShell scripts for custom deployment logic.. Advanced bug tracing and root-cause analysis across multiple layers (frontend, backend, database) in complex legacy financial systems, delivering stable long-term fixes.. Legacy codebase refactoring to improve readability, maintainability, and performance in production systems.. Active contributor to Angular 12 → 17 migration: adopting Standalone Components, @if/@for control flow syntax, and Signals for modern reactive patterns.