Architect large-scale infrastructure and networking systems behind Google Cloud

A senior infrastructure engineering role inside Google Cloud, writing and reviewing systems-level code and leading design reviews for networking and distributed-systems components that support enterprise customers in 200+ countries. Expect deep C++/C/Python systems work plus technical leadership expectations.

Practice this interview

Free · a live voice mock calibrated to this exact role

Start the mock interview

Likely format

Google SWE process typically: recruiter screen, 1-2 technical phone screens (coding), then an onsite loop covering coding, system design, and Googleyness/leadership behavioral rounds

What this interview tests

Large-scale distributed systems and networking infrastructure design
C++/C/Python systems programming depth
Leading design reviews and technology trade-off decisions
Production code review standards and best practices
Debugging and triaging infrastructure/network/service issues

Common question themes

Design a networking or infrastructure system that needs to scale across Google Cloud's customer base

Walk through a design review where you had to choose between competing technical approaches

Describe a production incident you traced back to a hardware, network, or service-level root cause

How do you give code review feedback that raises quality without stalling velocity

Tell me about a time you took on technical leadership without a formal title

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 · L4 Software Engineer, Google CloudOffer

Google L4 Cloud Software Engineer Interview: Downleveled to L3

A referred candidate interviewed for an L4 software engineer role on a Google Cloud team in Bangalore, going through a phone screen, three onsite coding rounds (the third left unfinished), and a culture conversation, only to have the hiring committee offer L3 instead of L4; the candidate obtained the compensation letter and declined the next day because the pay was below their current salary.

Interviewed 2021 · Bangalore, India

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

View the original posting

All Google Senior Software Engineer interviews

All Google interviews