Jul 2022 – Jan 2026 · 3 yrs 6 mos

• Working on AI incubation at Dev Box, a self-service cloud-powered development environment.

Aug 2019 – Jun 2022 · 2 yrs 10 mos

• Engineering manager for Visual Studio IntelliCode. We're augmenting developer tools with unobtrusive and trustworthy Artificial Intelligence. Additionally, supporting the GitHub Copilot integration into Visual Studio. Shipped the first GPT model to be run privately in the users’ own computers for IntelliCode completions in Visual Studio and VSCode (November 2021).

Aug 2018 – Jul 2019 · 11 mos

• Visual Studio IntelliCode. In charge of designing and implementing AI-infused features for Visual Studio and VSCode, as well as the web services that power these features.

Jun 2018 – Oct 2018 · 4 mos

• Azure IoT, Time Series Insights. Undisclosed project.

Sep 2017 – May 2018 · 8 mos

• Visual Studio Live Share. Designed the cloud architecture and led the implementation of the web services and infrastructure that power Visual Studio's next-generation experiences, such as LiveShare. The platform supports unassisted hyper-scale with sub-second response times, low-latency encrypted end-to-end communication, industry-leading up-time for customers, GDPR compliance, fully automated and auditable deployments, and very low operational costs.

Aug 2016 – Aug 2017 · 1 yr

• Azure Container Registry. Worked on shipping my first V1 service in Azure. Azure Container Registry provides an enterprise-class Docker container registry on the cloud that leverages Azure's datacenters and infrastructure to optimize speed, security and reliability of Docker container deployments. This is the first time I ship an Azure service, exposing me to the entire cycle of development and delivering, meeting Azure's high standards. I worked on feature code and drove the security compliance charter of the project. Delivered the Azure Container Registry service from idea to general availability. It was the first Linux container-powered service to hit general availability in Azure (March 2017).

Oct 2015 – Jul 2016 · 9 mos

• Working on the next generation of open source web projects for Microsoft: ASP.NET Core and .NET Core. As a Senior Development Engineer I'm focused on improving the performance, lowering the memory footprint, and increasing the overall throughput of ASP.NET applications of all sizes, running on all supported platforms: Windows, Linux and OSX.

Dec 2014 – Oct 2015 · 10 mos

• Xbox Music and Xbox Video are the premier entertainment experiences for console, phone and PC from Microsoft. More information can be found at http://www.xbox.com/.
• As a Senior Software Development Engineer it’s my responsibility to deliver high quality features with a very fast response rate, following best practices and agile methodologies. I’m also responsible for the technical aspects of performance verification and performance code reviews for our apps on the Xbox One console.

Nov 2010 – Dec 2014 · 4 yrs 1 mo

• The Entity Framework is a technology that bridges object oriented data models with the relational model of databases so that programmers rarely have to think of their data in terms of a particular database abstraction. The project has generated a large community of users and many features are in high demand. Performance is always a top priority. More information about Entity Framework at http://msdn.microsoft.com/en-us/data/ef.aspx.
• As a Senior Software Development Engineer I was responsible for the performance status of the project, as well as monitoring the status of the project and provide feedback to the team when new code or bug fixes regress the expected performance negatively. I was also responsible for delivering performance features, such as improvements to certain components or parts of the pipeline. I paid particular attention to the performance pains affecting our customers and focused my energy on the optimizations that bring more benefits to most scenarios. During my time with the team I saw the product become extremely popular, and its performance has improved tremendously thanks to our agile and open source development approach.
• This particular focus on performance has allowed me to become an area expert at both framework optimization and Entity Framework, which allowed me to visit multiple conferences and interact with global customers. I’m also the author of the Performance Considerations for EF 4, 5 and 6 white paper https://learn.microsoft.com/en-us/ef/ef6/fundamentals/performance/perf-whitepaper.

Mar 2009 – Oct 2010 · 1 yr 7 mos · Heredia, Costa Rica

• The Product Development team is in charge of developing new video games and provides maintenance for video games already in the market. The games vary a lot between them, but most efforts go to the creation of PC games for the Casino industry. The process involves everything from concept, to art, to development, to automated testing.
• I was the person in charge of creating and verifying the statistics and physics that drive the behavior of various types of games. Additionally, I served as a programmer and provided architectural design, coding, tools development, analysis of defects and effort estimation on a regular basis. In the last few months, I also developed proof-of-concept games based on Silverlight.

Nov 2008 – Feb 2009 · 3 mos · Heredia, Costa Rica

• Fiserv Fraud & Compliance’s FraudGuard and ExchangeGuard packages provide crucial functionality to financial institutions throughout the United States, allowing for different types of bank to bank electronic communication and providing check security and analysis tools.
• I was the person in charge of coordinating all the developers in the project, the time they allocate to activities, the project planning and most importantly, the communication aspect of the operation. I was also considered one of the developers, so I had to provide design solutions and coding. Finally, I was ultimately responsible for the quality of our deliverables, making me also a part of the QA and verification process, leading a small team of QA engineers.

Nov 2007 – Nov 2008 · 1 yr · Heredia, Costa Rica

• Fiserv Fraud & Compliance’s FraudGuard and ExchangeGuard packages provide crucial functionality to financial institutions throughout the United States, allowing for different types of bank to bank electronic communication and providing check security and analysis tools.
• Within the FraudGuard and ExchangeGuard projects, I was assigned to the maintenance and customization of different sections of the systems. I was mostly involved with the optical analysis of paper checks and the rules that help the system decide what to do about the information found in the check images.

Oct 2005 – Nov 2007 · 2 yrs 1 mo · Heredia, Costa Rica

• The Engineering team is in charge of providing MARS (measurable, accurate, repeatable, simple) solutions to the company’s technological needs. It’s also the responsible for pushing forward the technologies that produce the company’s revenue by exercising strong research and effective communication within the teams and with the rest of the company.
• I was assigned to improving specific sections of the company’s technologies by re-designing them and developing them leveraging Trax’s proprietary technologies in the best way possible. As a senior developer / tech lead, it was my responsibility to direct small teams while also providing development work myself. Additionally, I was responsible for my team’s response times and coding quality.
• I executed business-crucial projects (such as data-intensive audit websites), database performance improvement and proprietary technology development.
• Trax Technologies required a flexible, auditable system for rating the costs of different transactions. The system should be flexible enough for use with simple input applications (such as Microsoft Excel) and yet powerful enough to be hooked into Trax’s data analysis systems. My role was to provide design recommendations that would make this project possible, while also helping develop the product itself. The final solution was considered a domain-specific language for doing traceable and secure data lookups. This technology was then generalized and used for projects other than New Model Rating.
• Trax’s largest customer (HP) required us to implement a new type of data feed that was reliable, secure, highly normalized and in a standard EDI format called IDOC. This project demanded Trax to build a moderately complex file parser that would then be integrated into Trax’s data analysis systems. I was in charge of the design and development of HP Genie APAC’s data parser, as well as its deployment and integration to Trax’s data analysis systems.

Sep 2004 – Dec 2005 · 1 yr 3 mos · Cartago, Costa Rica

• Co-founder of TestingSoft, now Testing Software and NCubo Ideas. We started the business as a group of professionals with experience in quality assurance who acted as contractors to introduce good QA and testing practices into IT companies in Costa Rica. The company later evolved to be off-shore and "near-shore" testing and QA services for American companies. My role was to bootstrap the company (from incorporation, to finding a building, to purchasing computers and wiring the network), manage our first few employees, initiate sales leads and be a technical face to English-speaking customers given my language proficiency.

Jan 2002 – Oct 2005 · 3 yrs 9 mos · San Jose, Costa Rica

• Migration Services.
• In charge of many migration and re-architecture projects, mostly focused on migrations from Java to C#, VB6 to VB.NET, 32-bit C++ to 64-bit C++ and Informix to Java. Some of these projects have high complexity, and tend to be risky in the execution, making the team’s project management and technical skills the most important components for the company.
• Software Quality Assurance Department.
• Estimator of QA costs for some products of the company related to legacy applications. Testing of mixed technologies in different testing needs, such as white box testing, black box testing, regression testing, tests automation, manual testing, system testing and unit testing among others. Testing automation tools creation and manipulation for optimized distributed computing. Bug tracking and management. Creation and documentation of testing processes: Test Cases Design, Bug Tracking and Management, Regression Testing and others. Testing for large applications related to: Energetic facilities, Government foundations, Financial Corporations.
• Java Language Conversion Assistant.
• In charge of developing and implementing the testing automation process. In charge of testing the Java distributed platforms: RMI, CORBA and EJBs migrations. In charge of testing the Java web platforms: JSP, Taglibs and Servlets. In charge of designing and developing test cases and their respective scenarios. Bug tracking and management. Creation and documentation of testing processes based on expert knowledge, Software QA books and other supporting points. Coordinating with Microsoft Corp. personnel regarding the quality of the product.