Senior

Own the technical relationship with Reddit's biggest ad partners — code alongside them, not just advise

Reddit's Ads Business Engineering team sits between engineering, product, sales, and biz dev, turning advertiser and partner needs into shipped platform integrations. This Senior Business Engineer role is a hands-on technical-advisor position: prototyping proof-of-concepts inside partner codebases, driving Reddit's Ads API adoption, and unblocking high-impact integrations end to end.

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What this interview tests

Technical partner/solutions consulting for an advertising API platform
Hands-on coding in partner or Reddit codebases (Python/Java/JS/Node.js, backend/API focus)
REST APIs, HTTP, OAuth2/OpenID Connect, SDK design
Cross-org coordination across engineering, product, sales, and biz dev
Onboarding, testing, and pre-launch support for integrations
Escalation handling for complex/high-impact partner issues

Common question themes

Walk through an integration you built directly in a partner's or client's codebase

How do you influence a product roadmap as the 'voice of the partner' with no direct authority over the roadmap owners

Describe debugging a complex OAuth2/OpenID Connect or API integration issue with an external party

Tell me about an escalation on a high-impact partner integration you had to resolve quickly

How do you balance being a technical advisor vs. actually implementing the fix yourself

What does 'ecosystem of developers' scaling look like in an AdTech / advertiser API context

How candidates describe it

Real Senior Business 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

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