Christian Caldera, Developer in Gomez Palacio, Mexico

Christian Caldera

Software Developer

Gomez Palacio, Mexico
Toptal Member Since
February 29, 2016

Software development is Chris's greatest passion. He's always looking for something new to learn. Currently a senior developer, his goal is to be a software architect. He has a master's degree in computer science, has published papers, and has given many talks about computer science. He's worked with companies like HP, Softtek, and Herbalife on critical business apps, so he knows how to work with distributed teams and high responsibility.

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Toptal Client
Toptal Clients
Azure SQL, Azure Websites, Azure Cosmos DB, Azure Blobs, ASP.NET Core...
RFA Mortgages
Azure Websites, Azure Functions, Azure SQL, Git, ASP.NET, AngularJS, HTML, C#...


Gomez Palacio, Mexico



Preferred Environment

GitHub, Windows, Azure, .NET Core, .NET 5

The most amazing...

...thing I've coded is a web API using Windows Azure Cloud computing to calculate recommendations to third-party systems and their customers using AI.

Work Experience

2021 - 2022

.NET Team Lead Developer

Toptal Client
  • Managed a small team of developers to develop two critical projects for the company.
  • Worked on data migration and UI changes in a company merge project.
  • Led the development involving ASPX, ASP Web Forms, ASP MVC, ASP API, and ASP.NET Core.
Technologies: .NET, .NET Core, ASP.NET, ASPX, Web API, ASP.NET Web API, SQL, JSON
2018 - 2021

Senior .NET and Azure Developer

Toptal Clients
  • Worked on 14 web API microservices deployed on Azure.
  • Wrote unit tests and integration tests for the services.
  • Developed several apps to support the platforms we worked on.
Technologies: Azure SQL, Azure Websites, Azure Cosmos DB, Azure Blobs, ASP.NET Core, Azure Service Bus, Azure Table Storage, Azure Key Vault, Azure Search, Azure Stream Analytics, Web API, Octopus Deploy, Jira
2019 - 2020

Senior Full-stack Developer

RFA Mortgages
  • Maintained and developed a web app for financial services.
  • Maintained and developed some support services for the main app.
  • Participated in multiple architectural decisions and implementations.
Technologies: Azure Websites, Azure Functions, Azure SQL, Git, ASP.NET, AngularJS, HTML, C#, CSS, ASP.NET MVC, Azure Cosmos DB, .NET Core, Azure Table Storage, MongoDB
2017 - 2018

.NET Lead Developer

  • Created several providers to communicate with external vendors allowing interaction between their app and different technologies using HTTP, SOAP, and TCP.
  • Led a team of five developers to deliver high-quality milestones for our client.
  • Designed a lot of ETL application processes to migrate vendors' data to our database.
Technologies: TFS, Web API, Windows Communication Framework (WCF), Microsoft SQL Server, C#
2017 - 2018

Freelance Front-end Developer

Shapeshift (via Toptal)
  • Created a single-page app based on Angular 4 from scratch.
  • Created communication mechanisms for web sockets communication so the app could support real-time updates.
  • Helped on integration with the current application and its communication with the app.
Technologies: CSS, jQuery, WebSockets, Angular
2016 - 2017

Freelance Webmaster

Allegria Spa (via Toptal)
  • Maintained a web application.
  • Did styles, files, and content updates.
  • Helped to fix minor bugs.
Technologies: Microsoft SQL Server, CSS, HTML, C#, ASP.NET
2016 - 2017

Freelance Senior Full-stack Developer

Vox Global (via Toptal)
  • Worked with AngularJS to create client-side applications to build reports dynamically.
Technologies: Microsoft SQL Server, Web API, ASP.NET, C#, AngularJS
2014 - 2017

Senior Software Developer

  • Analyzed and designed new functionalities for an eCommerce page—no CMS used.
  • Developed new enhancements for both an eCommerce page and a page to configure multiple websites.
  • Managed and deployed software application updates on Windows Azure.
  • Provided production support for all our applications.
  • Developed front-end and back-end features using .NET technologies.
Technologies: ASP.NET MVC 4, Microsoft Azure, TFS, Microsoft SQL Server, CSS3, C#, HTML5, JavaScript, ASP.NET, Windows Communication Framework (WCF), .NET
2016 - 2016

Machine Learning Expert/Developer

Waikato, Inc. (via Toptal)
  • Developed a web API using Microsoft .NET with token authorization.
  • Developed both front-end and back-end features.
  • Used Azure DocumentDB.
  • Used Fitbit’s web API.
  • Provided continuous integration with daily deployments to Microsoft Azure.
Technologies: Azure, Tokenization, Web API, REST APIs, RESTful Development, JSON, jQuery, Azure DocumentDB, Microsoft SQL Server, ASP.NET MVC, Visual Studio 2015, .NET, C#
2013 - 2014

Software Engineer Contractor

Hewlett Packard
  • Supported four critical financial applications used for all countries.
  • Developed new functionalities for critical applications with a high impact on the business.
  • Implemented new functionalities on QA and production environments.
  • Analyzed and designed new functionalities for high-impact applications.
  • Led the development team through all the application lifecycle.
Technologies: ASP.NET MVC 4, Microsoft SQL Server, CSS, C#, HTML5, JavaScript, ASP.NET, Windows Communication Framework (WCF), .NET
2011 - 2013

Analyst Programmer

  • Developed front-end and back-end features using Adobe technology.
  • Developed new enhancements for an ERP system.
  • Provided production support for all our applications.
  • Migrated the database from Informix to SQL Server.
  • Looked after web servers.
Technologies: Adobe LiveCycle, Database as a Service (DBaaS), Google Maps API, jQuery, MVC Razor, ASP.NET, C#, HTML5, MySQL, PHP, SQL, Adobe ColdFusion, Flash ActionScript, Adobe Flex


Personal Portfolio
A comprehensive collection of my previous work.

.NET technologies and cloud services.



C#, HTML5, JavaScript, CSS3, CSS, Flash ActionScript, SQL, HTML


ASP.NET Core, ASP.NET MVC, ASP.NET, ASP.NET Web API, .NET, Entity 5, Windows Communication Framework (WCF), ASP.NET Web Forms, Razor, Angular, Bootstrap, AngularJS, ASP.NET MVC 4, Adobe Flex, MVC Razor, .NET Core, .NET 5


Object-oriented Programming (OOP), REST, Microservices, Real-time Systems, RESTful Development, Unit Testing


Azure, Azure PaaS, Windows, Azure Service Fabric, Azure Functions


Azure SQL, Microsoft SQL Server, Azure DocumentDB, Azure Queue, MongoDB, Azure Websites, MySQL, Azure Cosmos DB, Azure Blobs, JSON, Azure Table Storage


Web Services, Azure Service Bus, Azure Worker Roles, Azure Web Roles, Leadership, Architecture, Pattern Design, WebSockets, VM, Microsoft Azure, Database as a Service (DBaaS), Adobe LiveCycle, Tokenization, Azure Stream Analytics, Octopus Deploy, IT Project Management, Digital Transformation, Business Models, Software Development, Machine Learning, Software Architecture, Domain-driven Design (DDD)


Azure Blob Storage API, jQuery, Google Maps, Google Maps API, REST APIs, Web API, ASPX


TFS, GitHub, Azure DevOps Services, Azure Search, Azure App Service, Subversion (SVN), Visual Studio 2015, Git, Azure Key Vault, Jira


2019 - 2022

Master's Degree in IT Project Management

Tecnológico de Monterrey - Mexico

2013 - 2015

Master’s Degree in Computer Science and Engineering

Instituto Tecnológico de La Laguna - Torreon, Coahuila, Mexico

2010 - 2012

Bachelor's Degree in Computer Engineering

Universidad Politécnica Gómez Palacio - Gomez Palacio, Durango, Mexico