Ryan Day
Reston, Virginia, United States
Summary
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RockstarRyan Day is a seasoned software engineer with 16 years of experience who specializes in marrying hardware and software to automate repetitive workflows for niche industries. Based in Reston, Virginia, he builds large, reliable systems by leveraging APIs and cloud providers to assemble proven components quickly and securely. An active open-source contributor, Ryan has strengthened security-critical projects at AWS—improving TLS and QUIC implementations—and contributed clear, performance-minded documentation to the widely used Real Python guide. He brings a pragmatic focus on task automation so teams can tackle higher-order problems, and his work shows a penchant for both low-level protocol correctness and developer-facing clarity. Notably, he combines security proofs and practical token/key rotation improvements, reflecting an uncommon blend of formal rigor and production engineering.
16 years of coding experience
Stackoverflow
1,864reputation
478kreached
45answers
4questions
create-react-app
top-5%
Github Skills (36)
textbook10
ssl10
tls1210
restructuredtext10
python10
storybook10
testing10
it-security10
guideline10
rs10
c1110
tls1310
code-security10
user-guide10
security10
Programming languages (9)
Github contributions (5)
aws/s2n-tls
Nov 2019 - Apr 2021
An implementation of the TLS/SSL protocols
Role in this project:
Back-end Developer & Security Engineer
Back-end Developer & Security EngineerContributions:1 release, 121 reviews, 90 commits in 1 year 4 months
Contributions summary:Ryan primarily worked on improving the s2n-tls library, a TLS/SSL implementation, by addressing security vulnerabilities and enhancing code quality. Their contributions included refactoring the code, optimizing array length calculations, adding tests for security extensions, and implementing features like protocol downgrade protection. The user also added a CBMC proof for s2n_stuffer_erase_and_read, demonstrating a focus on security and reliability.
cryptographysslc99tlscrypto
aws/s2n-quic
Jul 2020 - Apr 2021
An implementation of the IETF QUIC protocol
Role in this project:Back-end Developer
Back-end DeveloperContributions:47 commits in 9 months
Contributions summary:Ryan primarily worked on implementing and refactoring core functionality related to the QUIC protocol within the s2n-quic project. Their contributions included adding and modifying path-related features, such as path management, address validation, and the generation of retry packets. Furthermore, the user made improvements to the token provider, adding duplicate token detection and enabling key rotation. These changes were crucial for addressing security and compliance requirements.
cryptographyquichttp3rustprotocol
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