Alexandros Ntousias
Director Of Engineering at Clerk.com
Athens Metropolitan Area Greece
Summary
🤩
Rockstar🎓
Top SchoolAlexandros Ntousias is a hands-on engineering leader and Director of Engineering based in Athens with two decades of experience building high-throughput, distributed systems and leading cross-functional teams. He has deep expertise in Scala, event-driven architectures (Kafka, CQRS, Event Sourcing), cloud-native infrastructure (Kubernetes, Terraform, AWS) and has scaled systems from blockchain platforms to real-time ad tech and loyalty services. At Clerk he moved from Principal Engineer and team lead to Director, contributing notable open-source improvements to Clerk’s official JavaScript auth library around multi-factor flows and organization management. He’s comfortable designing core architecture and also shipping pragmatic, type-safe code—having repeatedly built MVPs and production services from scratch. Alexandros combines hands-on coding with mentoring and teaching (Scala, Go, Kafka), a pattern reflected in roles across startups and large enterprises. A subtle through-line in his career is turning complex distributed algorithms and domain-specific languages into practical, maintainable production systems.
11 years of coding experience
13 years of employment as a software developer
MEng Electronic & Computer Engineering, MEng Electronic & Computer Engineering at Technical University of CreteUniversity College London
Github Skills (17)
javascript10
user-authentication10
typescript10
authentication10
manage10
typescript-types10
management10
typescripts10
organize10
react10
front-end-development9
backend8
nodejs8
back-end-development8
vue5
Programming languages (7)
Github contributions (5)
clerk/javascript
Feb 2022 - Jun 2022
Official JavaScript repository for Clerk authentication
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:18 reviews, 21 commits, 20 PRs in 3 months
Contributions summary:Alexandros primarily contributed to the Clerk JavaScript repository, focusing on authentication-related features. Their work included enhancing the `SignInFactorTwo` component to pass phone number IDs, modifying types to include phone number IDs for preparing second factors, and allowing optional usernames in sign-up components. Additionally, the user implemented features such as adding and deleting organizations within the Clerk system and adding an active organization shortcut in the Clerk singleton. The commits indicate a focus on improving the core authentication flow and organization management capabilities of the library.
gatsbyreacthasurajavascriptauthentication
alex-ntousias/gradle-guice-jersey-jetty
Feb 2016 - Oct 2016
Contributions:15 commits, 10 pushes, 1 branch in 7 months
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