Alexander Ubillus
Senior Software Engineer at Airbnb
Miami, Florida, United States
Summary
👤
Senior🎓
Top SchoolAlexander Ubillus is a Senior Software Engineer based in Miami with over a decade of professional experience building robust web platforms at companies like Airbnb and SAP Ariba. He brings deep full-stack and backend expertise across languages including Java, Kotlin, Swift, C#, and extensive .NET experience dating back to early roles, pairing hands-on coding with architectural and team leadership. Alexander contributes to notable open-source projects such as AngleSharp, where he improved HTML/CSS parsing reliability and cross-platform builds—demonstrating attention to standards compliance and test automation. Comfortable operating at both product-facing and infrastructure levels, he combines pragmatic engineering with a focus on maintainability and cross-OS compatibility. Colleagues describe him as a quietly reliable problem-solver who often surfaces subtle encoding and build issues before they reach production.
11 years of coding experience
15 years of employment as a software developer
Computer Science, Computer Science at CIBERTEC
English, Spanish
Stackoverflow
73reputation
702reached
1answer
2questions
Github Skills (19)
unit-testing10
anglesharp10
net10
dotnet10
asp-net10
html-parsing10
encoding10
dotnet-core10
c-library10
common-library10
csharp10
build-automation9
maven6
swift6
macos6
Programming languages (7)
Github contributions (5)
AngleSharp/AngleSharp
Nov 2018 - Dec 2018
:angel: The ultimate angle brackets parser library parsing HTML5, MathML, SVG and CSS to construct a DOM based on the official W3C specifications.
Role in this project:
Back-end Developer & Test Automation Engineer
Back-end Developer & Test Automation EngineerContributions:6 commits, 1 PR, 7 comments in 10 days
Contributions summary:Alexander focused on improving the AngleSharp library's functionality and reliability. They contributed by fixing unit test issues related to encoding and character sets, ensuring the accurate parsing of HTML content. Their work also included modifying project configurations to support various build targets and fixing build-related issues. They also worked on adapting the project to be compatible with different operating systems such as *nix systems.
cssdommathmlparserparsing
alexanderuv/vulkanSwift
Jan 2019 - Jan 2020
Contributions:28 commits, 15 pushes, 2 branches in 1 year
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