Presentation: A/B Testing at Scale with Open Source Proctor

Track: Sponsored Solutions Track II

Location: Marina

Duration: 1:40pm - 2:30pm

Day of week: Monday

Level: Intermediate

Persona: Architect, CTO/CIO/Leadership, Developer, DevOps Engineer, General Software, Technical Engineering Manager

Share this on:


Indeed has been conducting A/B tests for a decade on millions of job seekers around the world. Over the years, we learned a lot. Many of our practices are built into Proctor, our open source A/B testing framework.

In this talk, I will cover requirements for A/B testing at scale, the architecture and algorithms behind Proctor, and best practices for running A/B tests. Learn how you can apply Proctor in your own products to get the benefits of rapid, data-driven experimentation.

Speaker: Ketan Gangatirkar

Senior Director of Engineering - Job Seeker Products @Indeed

Ketan Gangatirkar leads teams building software that helps people get jobs. These teams experiment on millions of people to get better and better at helping them get jobs, which only rarely leads to deadly mutations. When he's not experimenting on job seekers, he experiments on his three children, which statisticians call “lacking validity” and his neighbors call “immoral” and “appalling.”

Find Ketan Gangatirkar at

Similar Talks

Technical Infrastructure Lead @Thumbtack
Software Engineer @Slack



  • Architectures You've Always Wondered About

    Architectural practices from the world's most well-known properties, featuring startups, massive scale, evolving architectures, and software tools used by nearly all of us.

  • Going Serverless

    Learn about the state of Serverless & how to successfully leverage it! Lessons learned in the track hit on security, scalability, IoT, and offer warnings to watch out for.

  • Microservices: Patterns and Practices

    Stories of success and failure building modern Microservices, including event sourcing, reactive, decomposition, & more.

  • DevOps: You Build It, You Run It

    Pushing DevOps beyond adoption into cultural change. Hear about designing resilience, managing alerting, CI/CD lessons, & security. Features lessons from open source, Linkedin, Netflix, Financial Times, & more. 

  • The Art of Chaos Engineering

    Failure is going to happen - Are you ready? Chaos engineering is an emerging discipline - What is the state of the art?

  • The Whole Engineer

    Success as an engineer is more than writing code. Hear inward looking thoughts on inclusion, attitude, leadership, remote working, and not becoming the brilliant jerk.

  • Evolving Java

    Java continues to evolve & change. Track covers Spring 5, async, Kotlin, serverless, the 6-month cadence plans, & AI/ML use cases.

  • Security: Attacking and Defending

    Offense and defensive security evolution that application developers should know about including SGX Enclaves, effects of AI, software exploitation techniques, & crowd defense

  • The Practice & Frontiers of AI

    Learn about machine learning in practice and on the horizon. Learn about ML at Quora, Uber's Michelangelo, ML workflow with Netflix Meson and topics on Bots, Conversational interfaces, automation, and deployment practices in the space.

  • 21st Century Languages

    Compile to Native, Microservices, Machine learning... tailor-made languages solving modern challenges, featuring use cases around Go, Rust, C#, and Elm.

  • Modern CS in the Real World

    Applied trends in Computer Science that are likely to affect Software Engineers today. Topics include category theory, crypto, CRDT's, logic-based automated reasoning, and more.

  • Stream Processing In The Modern Age

    Compelling applications of stream processing using Flink, Beam, Spark, Strymon & recent advances in the field, including Custom Windowing, Stateful Streaming, SQL over Streams.  

Conference for Professional Software Developers