I went through the Google frontend SWE interview for an L4 role (Bay Area, hybrid) in early 2026. Sharing the breakdown because frontend-specific Google interview posts are oddly rare.
First thing to know: Google doesn't really have a 'frontend' role in the same way that, say, a startup does. You're hiring for SWE, sometimes with a frontend focus. That means you get the same general SWE interview structure, and you can't rely on JavaScript trivia or CSS knowledge to carry you.
My loop was 4 onsite rounds plus a behavioral round:
Coding (x3): This is the majority of the loop. One of my three was frontend-adjacent: implement a debounce function from scratch, then use it to build a rate-limited autocomplete component (pseudocode level, not full React). The other two were pure algorithms. One was a string manipulation problem (medium), one was a tree problem I blanked on briefly and had to recover from. They do not give you the ability to use the DOM or a browser, just a coding editor.
Behavioral (Googleyness): They asked about a time I disagreed with a technical decision. I talked through a case where I pushed back on moving to a new component library mid-project because of migration risk. They probed: who was in the room, how did I raise it, what was the outcome. Be specific about your role.
System Design (light): For L4 this was more of a frontend design question. Design a news feed: pagination strategy, lazy loading, caching on the client side, how you'd handle the API shape to support different device types. This felt like the round I did best in because it matched what I actually do.
Big callout: I used to think being strong in React and modern JS would be enough for a Google frontend loop. It's not, not if you haven't touched algorithms. I spent 6 weeks on Neetcode before the onsite and I still almost didn't make it through the tree problem.
Offer was L4. TC came in around $285k for Mountain View. I negotiated up from their first number by about $15k in base.