Just finished a PM loop at Twilio for a senior PM role on their Messaging products. Did not take the offer (comp was light vs. what I was making, and they were slow to move) but the process itself is worth documenting because it's well-designed compared to a lot of PM loops I've done.
Five rounds total:
Product Sense (60 min) Classic "design a product" question with a Twilio twist. Mine was: "How would you improve the Twilio Console experience for developers building their first SMS integration?" They want you to show customer empathy specifically for technical users. I talked through developer personas, the friction points in the API setup flow, and prioritized based on activation impact. They probed on metrics: what does success look like and how would you measure it?
Strategy (45 min) Open-ended: "The CPaaS market is becoming commoditized. What should Twilio do?" This is a genuine exec-type discussion. I came in with a POV on differentiation via AI-native messaging (think LLM-driven conversation flows) and vertical specialization. They pushed back. Good disagreement, no right answer, they just want to see how you hold and update a position.
Analytical (45 min) Given a funnel: developer signs up, creates a project, sends first SMS. Where would you focus to improve developer activation? Walk me through your analysis. They gave me a hypothetical data set and I had to prioritize by impact. No SQL, purely conceptual analysis and prioritization.
Behavioral x2 Same questions as the SWE behavioral round more or less. Influencing without authority, a launch that didn't go as planned, cross-functional conflict.
What they actually care about: deep developer empathy, business clarity, and being able to connect product decisions to revenue/retention metrics. If you've never built on a Twilio API yourself, spend a day doing it before the loop. Knowing where the friction is in their actual product is more useful than any framework.
Comp data point: band for senior PM was around $220k-$250k TC. Felt low for the role and scope, which is why I didn't move forward.