Justin Tay
Software Engineer at Self-employed
Singapore
Summary
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RockstarJustin Tay is a Singapore-based software engineer with seven years of experience building backend systems and a strong focus on authentication and identity platforms. As a self-employed developer he contributes to high-profile open-source projects like Keycloak, where he has improved JWT authentication, client assertion handling, audience customization, and implemented PAR endpoint changes. He blends practical production-focused coding with security-minded design, making integrations more robust and configurable. Comfortable working independently, he brings a pragmatic approach to solving tricky protocol and token-handling issues that often surface in distributed systems.
7 years of coding experience
Github Skills (8)
keycloak10
javas10
oid10
authentication10
user-authentication10
java10
jwt10
saml9
Programming languages (10)
Github contributions (5)
keycloak/keycloak
Jul 2023 - Aug 2024
Open Source Identity and Access Management For Modern Applications and Services
Role in this project:
Back-end Developer
Back-end DeveloperContributions:7 reviews, 14 PRs, 22 comments in 1 year 1 month
Contributions summary:Justin primarily contributed to implementing and improving the Keycloak Identity and Access Management platform. They focused on enhancing JWT authentication by addressing client ID handling in token requests. Their work also involved fixing issues related to client assertions with invalid signatures and allowing for customization of the audience claim in JWT authentication. Additionally, the user implemented code changes related to the PAR endpoint.
access-managementkeycloakoidcsaml
justin-tay/json-schema-validator
Nov 2023 - Apr 2026
A fast Java JSON schema validator that supports draft V4, V6, V7, V2019-09 and V2020-12
Contributions:1 PR, 940 pushes, 227 branches in 2 years 4 months
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