Bootstrap a new Kubernetes networking domain for Roblox's ML training/inference infrastructure

Design a Senior Software Engineer interview for a brand-new Kubernetes Networking team at Roblox, tasked with founding the networking layer for a high-performance ML training/inference compute cluster. Focus on deep Kubernetes networking expertise, hands-on Cilium/eBPF experience, and comfort setting technical direction from zero.

Practice this interview

Free · a live voice mock calibrated to this exact role

Start the mock interview

What this interview tests

Kubernetes networking architecture (ingress, service mesh)
Cilium and eBPF hands-on expertise
Founding new infrastructure from high ambiguity
Networking considerations for ML training/inference workloads
On-call ownership of critical infrastructure systems

Common question themes

Explain how eBPF/Cilium-based networking differs from traditional iptables approaches and why it matters at scale

Tell me about a time you set the technical strategy for a brand-new system with no existing architecture

How would you design a Kubernetes networking layer for a high-throughput ML training cluster

Describe a critical on-call incident in a networking or infrastructure system you owned

How do you mentor engineers while also driving execution on a 0-to-1 team

How candidates describe it

Real Senior Software Engineer interview stories — retold from candidates' public write-ups, with sources.

Bloomberg · Senior Software EngineerOffer

Bloomberg Senior Software Engineer Interview: Five Rounds, Offer

A Senior Software Engineer candidate applied to Bloomberg's London office through the company's careers site and, after an initial screen, went through five separate on-site conversations covering coding, system design, a recruiter chat, and a hiring-manager round, ultimately accepting an offer.

Interviewed October 2022 · London, United Kingdom

Google · L3 Software EngineerOffer

Google L3 software engineer interview: phone screen, four coding rounds, and the Googleyness round

A candidate with two years of experience went from recruiter outreach to offer over about four months. The onsite was four 45-minute coding rounds — three of them featuring binary trees — and one round turned into a 25-minute chain of follow-ups about approximating an optimal solution at scale.

Interviewed June 2020 · Bangalore, IN

Google · L4 Software EngineerNo offer

Google L4 Software Engineer Interview: Eight Rounds, No Offer

An L4 Software Engineer candidate went through two phone screens, three onsite rounds, a culture conversation, and a team-matching call with a Google hiring manager, then watched the process stall for about a month and a half over a tightened experience requirement before an added extended round ended without an offer.

Interviewed February 2024 · Not specified

View the original posting

All Roblox Senior Software Engineer interviews

All Roblox interviews