Andrew Ayer
Founder at SSLMate
Boston, Massachusetts, United States
Summary
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RockstarAndrew Ayer is a bootstrapped founder and seasoned software engineer with 13 years of experience building security-focused infrastructure and developer tools from Boston. As the creator of SSLMate he simplifies SSL certificate management and works deeply in WebPKI and Certificate Transparency, blending product ownership with low-level security engineering. His open-source contributions span Homebrew packaging, a Certificate Transparency monitor (certspotter), and enhancements to git-crypt, reflecting practical expertise in secure tooling, packaging, and robust backend systems. Comfortable shipping cross-platform tooling and hardening cryptographic workflows, he pairs entrepreneurial grit with hands-on implementation of real-world security fixes and telemetry.
14 years of coding experience
Github Skills (26)
git10
c-language10
package-management10
it-security10
security10
homebrew10
hmac-sha110
go10
file-encryption10
x50910
openssl10
cprogramming-language10
encryption10
certificate-transparency10
pki9
Programming languages (16)
Github contributions (5)
AGWA/git-crypt
Jul 2012 - Jun 2022
Transparent file encryption in git
Role in this project:
Back-end Developer & Security Engineer
Back-end Developer & Security EngineerContributions:2 releases, 197 commits, 30 PRs in 10 years
Contributions summary:Andrew primarily contributed to the core functionality of the git-crypt project, a tool for file encryption in Git. They focused on implementing security enhancements by improving the encryption scheme, incorporating HMAC-SHA1 for deterministic encryption, and addressing potential vulnerabilities related to key handling. The user added several features and fixes including setting a umask for temporary files and improving the usability of the init command.
file-encryption
SSLMate/certspotter
Feb 2016 - Jun 2022
Lightweight Certificate Transparency Log Monitor
Role in this project:Back-end Developer & Security Engineer
Back-end Developer & Security EngineerContributions:205 commits, 18 PRs, 68 pushes in 6 years 5 months
Contributions summary:Andrew primarily focused on enhancing the security and functionality of the certificate transparency log monitor. They implemented changes to handle and log errors, specifically those related to parsing certificates, with adjustments to the severity levels. The user also made significant code changes that improved the overall robustness of the system by integrating more comprehensive certificate parsing, implementing pre-certificate validation, and improving general code quality.
certificate-transparencypkix509securitywebpki
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