Senior .NET Developer

Hi, I’m Federico Stimpfl.

Backend services, data & integrations · production reliability

I design and build reliable .NET backend services — from REST APIs and ASP.NET Core backends with Entity Framework Core and SQL Server, to data workflows and system integrations powered by modern cloud and messaging technologies. I focus on observability, performance and production troubleshooting so systems stay healthy, stable, and easier to operate as they grow.

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About Me

I’m a Senior .NET Developer based in Buenos Aires, Argentina, focused on backend services, data and system integrations. I mainly work with ASP.NET Core, C#, Entity Framework Core, SQL Server and REST APIs, helping teams build and maintain stable .NET applications and services in production.

Throughout my career I’ve worked very closely with production environments: diagnosing incidents, analyzing root causes, improving performance and reliability, and using caching (Redis), messaging (RabbitMQ) and background services to keep systems responsive under real-world load.

While my main focus is backend, I’m also comfortable working on the front end, building responsive UIs with modern JavaScript and clean, maintainable layouts so users can actually enjoy the features we ship.

What I enjoy working on

Designing and maintaining ASP.NET Core APIs and backend services.
Modeling data and tuning queries with EF Core and SQL Server.
Diagnosing and resolving production incidents (L2/L3), from quick workarounds to long-term fixes.
Improving logging, error handling and observability in existing .NET applications.
Collaborating with teams to keep systems reliable, maintainable and production-ready.

Products

Software products I designed, built and published for real users and operational use.

Workflow Monitor

Commercial Product • .NET 10 • ASP.NET Core • SQL Server • Worker Service

On-premises monitoring for .NET and SQL Server workflows. Centralizes execution status, duration, processing metrics, errors and stale-process detection through an authenticated dashboard, REST API and Windows Worker Service, with offline commercial licensing.

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AlertaEstafa

Public Platform + API • .NET 10 • ASP.NET Core • EF Core • SQL Server • PWA

Preventive fraud-analysis platform for messages, links, phone numbers, calls, screenshots and audio. Combines explainable local rules, privacy-oriented processing, a responsive PWA and a commercial API with plans, quotas, API keys and Mercado Pago subscriptions.

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OPTIANZA

Consumer Platform • .NET 10 • ASP.NET Core • EF Core • SQL Server

Decision-support platform for everyday purchases and home projects. It turns user inputs into practical comparisons and recommendations across categories such as air conditioning, paint, flooring and heating.

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Selected Engineering Projects

Incident Ops Center v1.0

ASP.NET Core • EF Core 8 • AutoMapper • DTOs • xUnit tests

IncidentOpsCenter – .NET 8 Web API for managing L2/L3 production incidents with layered architecture, EF Core (InMemory provider, easily swappable to SQL Server), AutoMapper and xUnit tests.

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Reputation360 Platform

ASP.NET Core • EF Core • Azure • SignalR

SaaS solution for managing and improving company reputation. Features real-time dashboards, role-based access and optimized performance.

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TaskFlow Manager

ASP.NET MVC • EF Core • Redis • React

Productivity platform for technical teams. Workflow management, task delegation and team visibility powered by ASP.NET MVC, EF Core, Redis and a React front end.

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InventoryPro Suite

ASP.NET Core • Blazor • EF Core • SQL Server

Inventory and asset management system built with ASP.NET Core and Blazor, using EF Core and SQL Server for reliable data and ASP.NET Core Identity for secure access control.

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