Alex Weibel
Senior Software Development Engineer at Amazon Web Services (AWS)
Seattle, Washington, United States
Summary
🤩
Rockstar🎓
Top SchoolAlex Weibel is a Senior Software Development Engineer with a decade of experience building secure, high-performance systems at AWS, specializing in cryptography, TLS, and post-quantum algorithm integration. He combines a strong academic foundation from UT Austin (Turing Scholars) with hands-on contributions to prominent open-source projects like aws-sdk-java-v2 and the s2n-tls library, where he improved stability, added FIPS compliance, and hardened memory/error handling. At AWS he’s driven production deployments of PQ crypto and maintained critical TLS infrastructure supporting thousands of services, pairing research-led innovation with pragmatic engineering. His background also includes large-scale distributed data processing and fuzzy dedupe platforms for massive POI datasets, reflecting breadth across security and data systems. Colleagues rely on him for deep protocol knowledge, rigorous testing (including fuzzing and stress tests), and a track record of finding and fixing high-impact security flaws.
10 years of coding experience
8 years of employment as a software developer
Bachelor of Science (BS), Computer Science, Bachelor of Science (BS), Computer Science at The University of Texas at AustinVeterans Memorial High School
Stackoverflow
392reputation
47kreached
14answers
9questions
Github Skills (29)
ss10
ssl10
testing10
it-security10
sslv310
c1110
java10
security10
c1710
aws-sdk10
javas10
c9910
encryption10
unit-testing9
performance-testing9
Programming languages (10)
Github contributions (5)
aws/s2n-tls
Jul 2016 - Oct 2022
An implementation of the TLS/SSL protocols
Role in this project:
Back-end Developer / Security Engineer
Back-end Developer / Security EngineerContributions:275 reviews, 377 commits, 404 PRs in 6 years 4 months
Contributions summary:Alex primarily contributed to enhancing the security of the TLS/SSL protocols implemented in the `aws/s2n-tls` repository. Their work focused on addressing potential vulnerabilities by improving code quality. This involved adding safeguards, such as guards, for memory management in error scenarios and strengthening the underlying cryptographic operations. The changes included adding FIPS compliance for the cipher suites.
cryptographysslc99tlscrypto
aws/aws-sdk-java-v2
Jun 2019 - Oct 2021
The official AWS SDK for Java - Version 2
Role in this project:Back-end Developer & QA Engineer
Back-end Developer & QA EngineerContributions:2 reviews, 30 commits, 4 PRs in 2 years 4 months
Contributions summary:Alex primarily contributed to the AWS SDK for Java v2, specifically focusing on the AWS Common Runtime (CRT) client. Their work involved updating JavaDocs, fixing benchmark issues, and addressing race conditions in unit tests related to the CRT client. Additionally, the user refactored code and added stress tests to ensure stability and performance of the CRT client, which is crucial for the SDK.
amazonaws-sdksdkawsjava
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