Marcos Yacob
Software Engineer at Defakto Security
Argentina
Summary
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RockstarMarcos Yacob is a software engineer from Argentina with eight years of hands-on experience building secure, cloud-native systems and identity solutions. He has been a core contributor and maintainer on the CNCF SPIRE project, improving SPIFFE ID validation, customizable validators, and certificate bundle handling to harden runtime identity issuance. His career spans enterprise and product engineering roles—from HPE and Scytale to startups and consultancy—working across backend, security, and integration layers. Comfortable in both Java/.NET-era enterprise stacks and modern cloud-native tooling, he combines deep protocol-level security work with pragmatic service engineering. Marcos often surfaces subtle correctness fixes that prevent real-world identity and certificate pitfalls, reflecting a practical security-first mindset. Based in Argentina, he continues to contribute to open-source identity infrastructure while delivering secure software for commercial and security-focused organizations.
8 years of coding experience
16 years of employment as a software developer
English
Github Skills (10)
user-authentication10
authentication10
go10
api-design10
security10
cryptography9
grpc9
isam8
identity-management8
software-design8
Programming languages (6)
Github contributions (5)
spiffe/spire
Apr 2018 - Dec 2022
The SPIFFE Runtime Environment
Role in this project:
Backend Developer & Security Engineer
Backend Developer & Security EngineerContributions:1032 reviews, 254 commits, 773 PRs in 4 years 9 months
Contributions summary:Marcos's contributions primarily involved enhancing the security and correctness of the SPIFFE Runtime Environment. This is evidenced by the addition of SPIFFE ID validation within the registration process. The user also updated the service to allow specific validation contexts using custom validators, enhancing security and potentially implementing policy controls. Furthermore, they implemented a change to include the right bundle of the certificates based on the profile configuration.
spiffe
MarcosDY/go-spiffe
Jan 2020 - Jun 2026
Golang library to parse and verify SVIDs
Contributions:2 PRs, 128 pushes, 25 branches in 6 years 6 months
golanggolang-libraryverifyparserparse
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