
Senior
Be the technical bridge between Reddit's Ads API platform and its biggest advertising partners
Reddit's Ads Business Engineering team needs an engineer who is equal parts solutions architect and hands-on integrator, building proofs-of-concept directly in partner codebases, troubleshooting integration gaps, and representing partner needs back into Reddit's product roadmap. The interview weighs backend and API coding depth against consultative, cross-org influence skills.
Practice this interview
Free · a live voice mock calibrated to this exact role
What this interview tests
- Hands-on backend and API engineering in partner-facing integration contexts
- REST APIs, HTTP, OAuth2/OpenID Connect, and SDK design patterns
- Technical consulting: diagnosing and resolving integration gaps in external codebases
- Representing partner or customer technical feedback into internal product priorities
- Rapid proof-of-concept design and prototyping
- Cross-functional communication with engineering, product, sales, and business development
Common question themes
Describe an API or SDK integration you built or debugged directly in a partner's or client's codebase
How do you approach OAuth2/OpenID Connect when designing or troubleshooting a partner integration
Tell me about a time you had to advocate for a partner's technical need internally and change a roadmap or priority
Walk me through a proof-of-concept you prototyped to unblock a stalled integration and how you scoped it
How do you communicate a complex technical tradeoff to both an engineering counterpart and a business stakeholder
How candidates describe it
Real Senior Business Engineer interview stories — retold from candidates' public write-ups, with sources.
Google · L3 Software EngineerOfferGoogle 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 offerGoogle 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 offerGoogle 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
All Reddit Senior Business Engineer interviews
Related interviews

Senior
Senior Software Engineer, Core Platform

Mid
Machine Learning Systems Engineer, Ads ML Platform

Senior
Curriculum Lead, GTM Enablement

Affirm
Senior
Senior Partner Engineer

Affirm
Mid
Software Engineer II (Money Movement & Card Ledger)

Affirm
Senior