Building a brand-new React-based ads experience for advertisers and publishers on Roblox

Roblox is building a new Immersive Ads product for advertisers and publishers, and this Senior Frontend role owns high-traffic frontend surfaces within it. The work spans React/TypeScript component architecture, cross-platform delivery, and close collaboration with Product, Design, and Data to drive UX decisions through A/B testing.

Practice this interview

Free · a live voice mock calibrated to this exact role

Start the mock interview

What this interview tests

React/TypeScript component architecture for high-traffic surfaces
Cross-platform and cross-device frontend delivery
Client-server interaction performance
Data-driven UX via A/B testing
Cross-functional collaboration with Product, Design, Data
Building ambiguous 0-to-1 product surfaces

Common question themes

Walk through how you'd architect a new React/TypeScript frontend for a high-traffic, from-scratch ads product

How have you built a frontend solution that needed to work universally across platforms and devices

Describe an A/B test you ran that changed a UX decision — what did the data show

Tell me about refining client-server interaction to improve performance on a consumer-facing feature

How do you work with Product, Design, and Data partners to match users with the right experience

Describe a 0-to-1 feature you built with significant ambiguity in the requirements

How candidates describe it

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

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

Google · L5 Software EngineerNo offer

Google L5 software engineer interview: phone screening, three onsite rounds, system design, and a late rejection

A candidate interviewing for an L5 role went through a phone screening, three onsite coding rounds, a mobile system design round, and a Googleyness and Leadership round. Two of the four technical rounds went poorly by the candidate's own assessment, and after roughly two months of silence the recruiter reported that the role had been closed.

Interviewed January 2023 · Not specified

View the original posting

All Roblox interviews