Every day, tens of millions of people from around the world come to Roblox to play, learn, work, and socialize in immersive digital experiences created by the community. Our vision is to build a platform that enables shared experiences among billions of users. This is what’s known as the metaverse: a persistent space where anyone can do just about anything they can imagine, from anywhere in the world and on any device. Join us and you’ll usher in a new category of human interaction while solving exceptional challenges that you won’t find anywhere else.

Job Description

At Roblox, a deep understanding and measurement of users and creators' experience is critical to Roblox's rapid growth. The experimentation platform is enabling Roblox's success by empowering other teams at Roblox to use data and experiments to improve user acquisition, engagement, and retention.

We are building an industry leading platform and tools that allow other teams and our developers to run and automatically analyze experiments at scale. As the Principal Engineer on experimentation, you will lead the evolution and scaling of the experimentation platform. With over 50 million daily users (and growing!), the platform must scale to serve over 1M QPS. We are looking for an experienced engineer that's passionate about designing and building scalable systems for both online serving and offline analysis.

Our team's product will act as the interface between those defining experiments and the results of the variants across the Roblox experimentation platform. Scale is of the utmost importance as Roblox continues its development of our world class experimentation data platform.

You are:

  • A solid programmer with skills with compiled languages such as C#, Go, Java, C++, or others.

  • Someone who has designed and built backend platform systems that can handle over 1M QPS.

  • Knowledgeable with REST, API design patterns, and scalable containerized systems and micro-services

  • Data-driven focused on quality metrics and monitoring

  • An experienced backend engineer with 8+ years of work experience

  • A B.Sc. equivalent in CS or sufficient experience.

You May Have:

  • Experience in building experimentation platforms serving millions of users

  • Experience building and tuning Spark workflows at TB scale

  • Experience in SQL and a deep understanding of how queries are processed by the data warehouse or database

You Will:

  • Help scale our online experiment serving flow to 100x scale.

  • Design the experiment creation and analysis flows for the next generation of internal and external customers.

  • Partner with our experimentation platform team to build and scale our experimentation request and data processing workflow.

  • Design an extensible and scalable serving model to support novel experimentation strategies (like crossovers, community based enrollment, multi-armed bandits etc).

  • Help build a highly reliable serving flow to support experiments and feature rollouts

  • Help design an extensible and scalable data model to support the experimental analysis and reporting

You’ll Love:

  • Industry-leading compensation package

  • Excellent medical, dental, and vision coverage

  • A rewarding 401k program

  • Flexible vacation policy

  • Roflex - Flexible and supportive work policy

  • Roblox Admin badge for your avatar

  • At Roblox HQ:

    • Free catered lunches five times a week and several fully stocked kitchens with unlimited snacks

    • Onsite fitness center and fitness program credit

    • Annual CalTrain Go Pass

Roblox provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws. This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation and training.