Roblox · careers.roblox.com · checked today
Senior Software Engineer, Data Infrastructure Compute
Every day, tens of millions of people come to Roblox to explore, create, play, learn, and connect with friends in 3D immersive digital experiences– all created by our global community of developers and creators. At Roblox, we’re building the tools and platform that empower our community to bring any experience that they can imagine to life. Our vision is to reimagine the way people come together, from anywhere in the world, and on any device.
Skills, with evidence
- Spark
Spark on Kubernetes: Hands-on experience running Apache Spark on Kubernetes (EKS, GKE, or self-managed) as a platform, including executor and driver behavior, resource tuning, and troubleshooting failed or slow jobs.
must have - AWS
Cloud fluency: Experience with AWS (EKS, EC2, IAM, S3) or GCP equivalents, and infrastructure-as-code.
must have · not practised here - Kubernetes
Kubernetes depth: Strong experience operating production Kubernetes clusters at scale, such as upgrades, node lifecycle, autoscaling, and operators or controllers.
must have · not practised here - Python
Python is a plus, since much of our tuning and analysis tooling uses it.
- Cost & performance
Launch interactive Spark at scale: Deliver Spark Connect to support notebook workflows, including provisioning and managing the EKS compute that backs them, with sensible isolation, resource limits, and cost controls.
- Data quality
Be an owner of reliability and cost: Define SLOs and metrics, build observability, and drive down toil, incidents, and compute spend across a multi-tenant platform.
- Failure handling
Be an owner of reliability and cost: Define SLOs and metrics, build observability, and drive down toil, incidents, and compute spend across a multi-tenant platform.
- GCP
Cloud fluency: Experience with AWS (EKS, EC2, IAM, S3) or GCP equivalents, and infrastructure-as-code.
not practised here - Java
Engineering foundations: Strong proficiency in at least one of Go, Java, Scala, or Clojure , with a track record of writing clean, well-tested, maintainable backend code.
not practised here - Scala
Engineering foundations: Strong proficiency in at least one of Go, Java, Scala, or Clojure , with a track record of writing clean, well-tested, maintainable backend code.
not practised here - Terraform
Experience with the Spark Operator, Karpenter, Helm, Terraform, or Argo.
not practised here
Your plan
- The SQL screen: correct, then fast≈ 2 h
Data quality
- Late arriving event auditIntermediate
- Order anomaly auditIntermediate
- Premium and free listening by countryIntermediate
- Interview audit union capstoneAdvanced
- Airbnb: converting on a day with no published rateAdvanced
- Python: the data-wrangling round≈ 3 h
Python
- Diff two snapshots of a tableIntermediate
- Explode an array column into rowsIntermediate
- Flatten nested event payloadsIntermediate
- Keep only the latest row for each eventIntermediate
- Pivot a long metrics table to wideIntermediate
- Pipeline design: safe to run twice≈ 4 h
Failure handling
- Is this change safe?Intermediate
- The source will not let youIntermediate
- Changing a pipeline that’s already runningIntermediate
- SLA-aware alerting flowIntermediate
- The table everyone depends onIntermediate
- Spark: read the plan Spark actually ran≈ 2 h
Spark · Cost & performance
- broadcast() with auto-broadcast off, and the case where Spark ignores itIntermediate
- autoBroadcastJoinThreshold compares an estimate: flip a join with select() and one settingIntermediate
- Does Spark really run your EXISTS subquery once per row?Intermediate
- left_semi and left_anti: "customers who did / never did" without a full joinIntermediate
- A self-join on a real key that still multiplies rowsIntermediate
- Say it out loud≈ 1 h
20 drills · Intermediate + Advanced≈ 11 hours
Not covered by the plan: AWS, Kubernetes, GCP, Java, Scala, Terraform.
Readiness
Counted from drills you have completed anywhere on D8LooP.
leaves tomorrowremoved the moment Roblox closes it