Hi, I'm

Federico Freiberger

Team Lead · Senior .NET Engineer · Full-Stack Developer

10+ years building and running production web platforms with .NET, SQL Server, React and Azure.

See what's in production Email me
Federico Freiberger
// 01

About me

I've spent more than ten years building software for the web. Right now I lead a team at MultiTracks.com that owns the website, the APIs and the internal tools that musicians and churches use every week.

I care about the whole lifecycle, not only the code. On the side I build my own products from start to finish: I design them, write the code, deploy them and support the people who use them. Several are live today, and a few others quietly run businesses from behind a login.

My home stack is .NET, React, SQL Server and Azure. I keep learning all the time, and lately that means bringing AI agents into how I build software. I work from Buenos Aires (GMT-3) in fluent English. When I'm not coding, I'm probably making music.

10+ years
building for the web
Team Lead
at MultiTracks.com
.NET · React
SQL Server · Azure
GMT-3
Buenos Aires · fluent English
Microsoft Certified: Azure Fundamentals badge
Microsoft Certified: Azure Fundamentals
Verify on Credly ↗
// 02

In production

Things I've built that are live and used by real people.

Live

Iglesia Alianza Azul

alianzaazul.org ↗

Website and admin panel for a local church community: announcements, ministry teams, downloadable cell-group material and passwordless (magic link) login for staff.

  • Built-in MCP server with its own OAuth 2.1 authorization server, so staff can draft announcements from Claude or ChatGPT. AI only creates drafts; a human reviews and publishes.
  • Image uploads to Cloudflare R2, transactional email with Resend, deployed on Railway.
  • ASP.NET Core 10
  • Razor Pages
  • PostgreSQL
  • Tailwind CSS
  • OAuth 2.1
  • MCP
  • Cloudflare R2
  • Railway
Live

Lic. Lucrecia Martin - Nutritionist

nutrilucremartin.com ↗

Professional website for a licensed nutritionist: online and in-person consultations, healthy recipes, free downloadable guides and a dedicated resource section for oncology patients.

  • Statically exported Next.js site with a headless CMS (Storyblok) so recipes can be published without a deploy.
  • Hosted on Azure Static Web Apps.
  • Next.js 15
  • React
  • TypeScript
  • Tailwind CSS
  • shadcn/ui
  • Storyblok
  • Azure Static Web Apps
Private · behind login

Turnero - Clinic scheduling & billing

Appointment, patient and billing platform used by a healthcare practice.

  • Scheduling with cascading rules when working hours shift, plus blocked dates and time slots.
  • Charges, payments and allocations, health-insurance handling and a daily close, with soft-delete audit trails.
  • .NET 10
  • EF Core
  • SQL Server
  • Next.js 16
  • React 19
  • JWT auth
  • xUnit
Private · behind login

Planificador de Alabanza - Volunteer scheduler

Scheduling tool for a volunteer worship team: a rotation grid with load per person, open slots and conflict detection.

  • Role-based access (admin / team), magic-link login and per-person notifications.
  • All domain logic isolated in a tested service layer; single deployable unit served from one container.
  • .NET
  • Minimal API
  • React
  • Vite
  • SQLite
  • Docker
  • xUnit
// 03

Skills

Where I'm most comfortable working.

.NET Core

C#, ASP.NET Core and .NET Framework, from APIs to full web apps, since 2017

SQL Server

Entity Framework, Dapper, Stored procedures and the whole deal

.NET Framework

Maintaining and modernizing legacy .NET Framework systems

ReactJS

React and Next.js front ends, plus React Native mobile apps

Azure

Cloud deployments on Azure (AZ-900 certified); also Railway and Docker

PHP (Laravel)

Developed solutions for the local city council, freelance projects.

English

Fluent English skills.

// 04

Experience

Where I've worked.

  1. Team Lead/.NET Developer

    MultiTracks.com · Mar 2020 – Present

    Team Lead and .NET developer for the MultiTracks.com website, public APIs and internal tooling. Lead a team, review code and own delivery, working with SQL Server, Redis and Azure.

    • .Net Framework
    • Dapper
    • SQL Server
    • T-SQL
    • C#
    • .NET Core MVC
    • Visual Studio
    • Redis
    • Azure
    • NUnit
    • Github
    • Git

  2. .NET Developer

    MyMarketPlace builder · Jun 2017 – Mar 2020

    C#/.NET developer for the different customers of the company. Worked on the main product (My marketplace builder) and also lead several projects custom made for customers.

    • .Net Framework
    • Entity Framework
    • WSDL
    • SQL Server
    • ReactJS
    • C#
    • .NET Core MVC
    • .NET Core Razor
    • Visual Studio
    • Azure
    • Team Foundation Server

  3. Java/PL SQL Developer

    Estrategias Diferenciadas S.A. · Nov 2010 – Jun 2017

    Developed Java/PL SQL extensions for Mapfre insurance company

    • Java
    • PL/SQL
    • COBOL
    • Jasper Reports
    • Subversion

Freelance projects

Projects I took from scratch to finish.

Experimenta Azul

Jun 2019 – Jun 2020

Local Tourism app. - Developed the whole stack: React Native App with the Backoffice/Admin site and API in .net Core. - Responsible for the deployment of the API and Backend, and also for the app stores management.

  • React Native
  • .Net Core
  • Azure
  • Cloud VPS
  • HTML
  • .NET
  • SQL Server
  • Entity Framework
  • .Net Core MVC

PHP - Wordpress Template Development

Jun 2018 – May 2019

Various projects: - Magdafrank (Local Museum theme) - Ecommerce platform, woocommerce custom theme implementation: Scooby shop - Axel (Argentinian famous artist) artistic profile web theme - Martin Passeri (Argentinian surfer)

  • ReactJS
  • WebRTC
  • Javascript
  • CSS
  • HTML
  • .NET
  • SQL Server
  • Entity Framework

YourChoice English

Jun 2018 – May 2019

English classes management system: - Professors: courses, documentation, management for the classes, teachers schedule system. - Students login and assignment of hours of classes, documents, etc, with calendar handling system. - Integration with Paypal for recurring payment of students. - WebRTC solution implementation for the virtual classrooms.

  • ReactJS
  • WebRTC
  • Javascript
  • CSS
  • HTML
  • .NET

Local City Council

May 2017 – Aug 2017

SIGED - Local government system for the City Council. PHP/Laravel project to update the previous Council system.

  • Laravel
  • MySQL
  • Javascript
  • CSS
  • HTML
  • jQuery

Rockstar Hotels

Mar 2017 – Jun 2017

Project in Laravel/MySQL. Added Stripe as payment method. Several adjustments throughout the site. Markup adjustments for translation system.

  • Laravel
  • MySQL
  • Javascript
  • CSS
  • HTML
// 05

Continuous learning

53 courses completed and counting.

Integrating AI Agents into Development Workflows

Pluralsight - Adam Bertram · Jul 2025

Learn to build, deploy, and maintain AI agents that enhance developer workflows by automating code refactoring, DevOps tasks, and knowledge retrieval from documentation.

AI

DevOps with GitHub and Azure: The Big Picture

Pluralsight - Marcel de Vries · Jan 2024

GitHub has a tool suite to support continuous delivery and DevOps. Want to see what this tool suite can do for you? Then this course is for you! In less than two hours, you get a full overview of how the tools can support your team.

Implementing DevOps with GitHub and Microsoft Azure Path

Serverless Computing with Azure Functions

Pluralsight - A Cloud Guru · Aug 2023

A deep dive into the use of Azure Functions, including the use of several tools for creating, running, and operating Azure Functions.

Azure Functions

Debugging and Error Handling in ASP.NET Core 6 Web API

Pluralsight - Nertil Poci · Aug 2023

Learn how to properly handle errors in .NET 6 Web API projects. This course will teach you how to apply different error handling techniques for different scenarios in real applications to create a rich consumer experience.

ASP.NET Core 6 Web API Path

ASP.NET Core 6 Web API: Best Practices

Pluralsight - Steve 'Ardalis' Smith · Aug 2023

Modern apps require web APIs more than ever before. This course will teach you best practices for writing better web APIs using ASP.NET Core.

ASP.NET Core 6 Web API Path

Securing ASP.NET Core 6 with OAuth2 and OpenID Connect

Pluralsight - Kevin Dockx · Aug 2023

How to secure your ASP.NET Core 6 web applications and APIs with today’s de facto standards: OAuth2 and OpenID Connect.

ASP.NET Core 6 Web API Path
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Let's talk.

Open to interesting conversations and opportunities. The fastest way to reach me is by email or LinkedIn.

frei.federico@gmail.com
LinkedInGitHub