Alex Robbin - Co-Founder & CTO at GDU Labs

Alex Robbin

Co-Founder & CTO at GDU Labs

Mansfield, Massachusetts, United States

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Summary

👤

Senior

🎓

Top School

Alex Robbin is a seasoned software leader and Co-Founder & CTO with nearly 20 years of experience building durable web applications and the teams that ship them. He combines hands-on backend and database engineering—contributing to high-profile open source projects like Ruby on Rails and Datadog’s tracing client—with strategic architecture work at scale. Alex has repeatedly led technical transformations, from founding core platform patterns at startups to growing engineering teams from single digits to thirty while keeping delivery fast and maintainable. Recent work centers on AI-powered, enterprise-grade data platforms that normalize fragmented professional data for executive search and AI agents. He has deep experience integrating streaming systems (RisingWave, Pub/Sub, Dataflow) with PostgreSQL, BigQuery and ElasticSearch to process hundreds of millions of events monthly. Colleagues rely on him to balance technical debt against product velocity and to turn complex data flows into reliable, observable systems.

14 years of coding experience

20 years of employment as a software developer

Bachelor of Science - BS Entrepreneurship and Legal Studies, Bachelor of Science - BS Entrepreneurship and Legal Studies at Bryant University

Stackoverflow

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Github Skills (18)

application-framework10

ruby-rails10

postgresql10

tracer10

distributed-tracing10

app-framework10

rails10

ruby10

database-design10

datadog10

activerecord10

web-framework10

trace10

sidekiq9

sql9

Programming languages (12)

PowerShellTypeScriptMDXShellRustCJavaScriptGo

Github contributions (5)

DataDog/dd-trace-rb

Jan 2021 - Jan 2023

Datadog Tracing Ruby Client

Role in this project:

Back-end Developer

Contributions:16 reviews, 8 commits, 9 PRs in 2 years

Contributions summary:Alex primarily focused on instrumenting various components of the Datadog Ruby tracing client. This involved integrating with HTTP client libraries like `httpclient` and adding instrumentation for Rails Action Cable, Sidekiq server internals (heartbeat, job fetch, and scheduled push), and Active Job logs for correlation. The user also implemented features such as correlating Active Job logs, and adding Stripe instrumentation, and enhancing the Rest Client integration with a `split_by_domain` option.

apmtracingruby-clientrubydatadog-tracing

rails/rails

Aug 2016 - Jan 2021

Ruby on Rails

Role in this project:

Back-end Developer / Database Engineer

Contributions:14 reviews, 7 commits, 15 PRs in 4 years 6 months

Contributions summary:Alex contributed to the ActiveRecord component of Rails, focusing on database-related features and improvements. Their work included adding support for multiple indexes on the same column and implementing exclusion constraints specifically for PostgreSQL databases. They also added functionality to validate check constraints in PostgreSQL and modified the exceptions handling for HTTP methods in the Action Dispatch middleware. These changes demonstrate a strong understanding of database interactions and Rails' internal workings.

ruby-on-railsrailsframeworkrubymvc

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