Ray Luo
Senior Software Engineer at Microsoft
Redmond, Washington, United States
Summary
🤩
Rockstar🎓
Top SchoolRay Luo is a Senior Software Engineer in Redmond with over a decade building high-performance, distributed systems and RESTful APIs across Python, C++, and JavaScript. He owns and contributes to major open-source projects at Microsoft and AWS, including significant work on MSAL for Python and top-contributor history in botocore and the AWS CLI. Ray combines hands-on engineering with architecture experience—designing SOA-based, loosely coupled services and delivering dramatic performance improvements (e.g., a 336x speedup in a traffic prediction module). He is fluent in cloud and deployment environments, test-driven development, and improving developer workflows through better test suites and tooling. An active open-source maintainer and frequent Stack Overflow contributor, he has influenced millions of developers with practical answers and widely used library fixes. With an MBA from MIT Sloan and deep production experience, Ray bridges technical depth with product and team leadership.
10 years of coding experience
17 years of employment as a software developer
Master of Business Administration (M.B.A.), Business Administration and Management, General, Master of Business Administration (M.B.A.), Business Administration and Management, General at Massachusetts Institute of Technology - Sloan School of ManagementBachelor's Degree, Computer Science, Bachelor's Degree, Computer Science at Sun Yat-sen University - Lingnan (University) College
English, Chinese, Chinese
Stackoverflow
18,126reputation
7.6mreached
113answers
10questions
pycharm
top-1%
logging
top-5%
uri
top-5%
patch
top-5%
http
top-1%
python
top-1%
Github Skills (64)
s3-bucket10
unit-testing10
debug10
authorizations10
botocore10
web-application10
python10
apidoc10
testing10
net10
http10
user-authentication10
authentication10
dotnet10
flask-ask10
Programming languages (18)
Github contributions (5)
AzureAD/microsoft-authentication-library-for-python
Aug 2016 - Jan 2023
Microsoft Authentication Library (MSAL) for Python makes it easy to authenticate to Microsoft Entra ID. General docs are available here https://learn.microsoft.com/entra/msal/python/ Stable APIs are documented here https://msal-python.readthedocs.io. Questions can be asked on www.stackoverflow.com with tag "msal" + "python".
Role in this project:
Back-end Developer
Back-end DeveloperContributions:50 releases, 292 reviews, 955 commits in 6 years 5 months
Contributions summary:Ray primarily contributed to the backend implementation of the Microsoft Authentication Library (MSAL) for Python. Their work involved defining a generic `MsalError` class, scaffolding test cases, and implementing experimental OAuth2 client secret flow, alongside a generic low-level OAuth implementation. The user also refactored the OAuth2 interface and implemented client credential support using certificate.
pythonmsal-pythonmicrosoft-authenticationmicrosoft-authentication-libraryoffice365
Azure-Samples/ms-identity-python-webapp
Sep 2019 - Jun 2022
A Python web application calling Microsoft graph that is secured using the Microsoft identity platform
Role in this project:Back-end Developer
Back-end DeveloperContributions:8 releases, 43 reviews, 59 commits in 2 years 9 months
Contributions summary:Ray primarily focused on refactoring the Python web application to integrate with the Microsoft identity platform. They adjusted the application structure, removed a global MSAL app instance, and introduced configuration files. Key changes included modifying the login and logout flows and implementing a mechanism to retrieve tokens. Furthermore, the user addressed authentication and authorization failures, including B2C-related scenarios. The user updated the application to use the new MSAL auth code flow API and improved the deployment process by implementing a ProxyFix for production environments.
callingpythonpython-websecuredweb-application
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