Lindsay Stewart
Software Development Engineer, AWS Cryptography at Amazon Web Services (AWS)
Seattle, Washington, United States
Summary
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Rockstar🎓
Top SchoolLindsay Stewart is a software development engineer with six years of experience building secure, distributed systems at Amazon Web Services and Amazon. Currently on the AWS Cryptography team, Lindsay contributes to open-source crypto and networking libraries such as the widely used s2n-tls, where they implemented TLS 1.3 features like early data and improved client certificate handling. Prior work includes designing the distribution layer for EC2 networking features on Nitro instances and building scalable, secure services for internal resource protection. Comfortable across systems-level C/C++ work and higher-level service design, Lindsay focuses on cryptography, networking, and security but welcomes novel engineering challenges. A UCSB computer science graduate with a strong academic record, they combine protocol-level expertise with practical production delivery. An interesting thread through their career is translating deep security concepts into pragmatic, deployable code that improves real-world system interoperability.
6 years of coding experience
4 years of employment as a software developer
Bachelor of Science (B.S.), Computer Science, 3.75, Bachelor of Science (B.S.), Computer Science, 3.75 at University of California, Santa BarbaraPoway High
Github Skills (9)
c1710
exchange10
certification10
verification10
certificate10
cert10
c1110
ssl-certificate10
security-protocol10
Programming languages (5)
Github contributions (5)
aws/s2n-tls
Jul 2019 - Jan 2023
An implementation of the TLS/SSL protocols
Role in this project:
Back-end Developer
Back-end DeveloperContributions:3 releases, 4295 reviews, 383 commits in 3 years 7 months
Contributions summary:Lindsay implemented and improved the s2n-tls library's TLS1.3 and SSLv2 functionality. Their contributions included adding support for features like early data, certificate authorities, and renegotiation, alongside fixes for existing issues. The commits reveal the user's involvement in enhancing security features and the overall compatibility of s2n-tls with different TLS versions. Key changes centered around protocol logic, key management, and handling of client certificate verification.
cryptographysslc99tlscrypto
lrstewart/s2n
Jul 2019 - Apr 2025
s2n : an implementation of the TLS/SSL protocols
Contributions:10 releases, 106 PRs, 3586 pushes in 5 years 9 months
sslja3tlsssl-tlstls13
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