Isaac Semaya
Software Engineer at Square
San Francisco, California, United States
Summary
🤩
Rockstar🎓
Top SchoolIsaac Semaya is a software engineer in San Francisco with five years' experience building security and fraud systems at Square, where he progressed from cryptographic identities and secrets management to leading buyer fraud and risk efforts. He brings hands-on engineering depth—contributing to Square's open-source certstrap by improving Windows compatibility, adding revoke passphrase support, and modernizing the Go toolchain—demonstrating a knack for production cryptography and cross-platform tooling. A Brown University ScB in Computer Science, Isaac pairs mobile secure key infrastructure and product security experience with practical DevOps and back-end engineering. He’s comfortable shifting between low-level crypto plumbing and high-level risk detection to deliver auditable, production-ready solutions.
6 years of coding experience
ScB, Computer Science, ScB, Computer Science at Brown UniversityHigh School Diploma, High School Diploma at The American School in London
English, Japanese, Spanish
Github Skills (16)
bootstrap210
mtls10
bootstra10
go10
tls1210
certificate-authority10
bootstrap10
tls1310
libtls10
testing9
command-line-interface9
commandline-interface9
windows8
cryptos7
ci-cd7
Programming languages (3)
Github contributions (5)
square/certstrap
Mar 2022 - Dec 2022
Tools to bootstrap CAs, certificate requests, and signed certificates.
Role in this project:
Back-end Developer & DevOps Engineer
Back-end Developer & DevOps EngineerContributions:3 reviews, 17 commits, 13 PRs in 9 months
Contributions summary:Isaac primarily contributed to improving the `certstrap` tool, focusing on cross-platform compatibility and enhancing the functionality of the `revoke` command. Their work included adapting the code to handle Windows-specific permission constraints, adding a passphrase flag for the `revoke` command, and integrating this command into the workflow tests. They also updated the Go version used by the project and removed debugging print statements.
golangcertificate-authoritysslsignedtls
isemaya-square/sharkey
Feb 2020 - Feb 2020
Sharkey is a service for managing certificates for use by OpenSSH
Contributions:6 pushes, 2 branches in 10 days
managing-certificatessslsecuritysshtls
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