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Q

Quentin Rousseau

Co-founder & CTO, Rootly

Incident Management

Quentin Rousseau is a co-founder and the CTO of Rootly, the on-call and incident management software company he started with JJ Tang after both worked at Instacart. Y Combinator's profile describes him as an early site reliability engineer at Instacart and a two-time co-founder, of Rootly (YC S21) and PopSQL (YC S19).

Quentin hasn’t spoken on a TechTO, TechVancouver or TechWaterloo stage. This profile is here because Quentin co-founded Rootly, which appears in 2 talks in the archive.

Around the web ×1

Article
Rootly Drops Small PR Rule as Agentic AI Changes Code Review EconomicsInfoQ
2026

Quick answers

Who is Quentin Rousseau?

A co-founder of Rootly and its chief technology officer. Rootly's Y Combinator company profile, checked in September 2026, lists him as "Founder and CTO" alongside JJ Tang.

What did Quentin Rousseau do before Rootly?

Y Combinator's profile, checked in September 2026, describes him as an "Early Site Reliability Engineer (SRE) at Instacart" and a "2x Co-Founder at Rootly (YC S21) and PopSQL (YC S19)." A July 2024 Sagetap founder story on Rootly calls him one of Instacart's first site reliability engineers.

How did Rootly start?

TechCrunch reported on August 10, 2023, when Rootly raised US$12 million, that JJ Tang founded the company with Quentin Rousseau, whom he met while working on Instacart's product side for enterprise.

What has Quentin Rousseau said about AI-written code?

InfoQ reported in August 2026 that Rousseau explained why Rootly dropped its long-standing small pull request rule once AI agents were writing much of the code, and quoted him saying "AI bugs are context bugs."

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Maintained by TechTO · facts sourced and dated · last reviewed Sep 17, 2026