Inside Instacart’s Culture Playbook: Max Mullen’s Tactics for Values that Drive Behavior

Futuristic home office with a glowing OS dashboard on a wall-sized screen, sunlit wooden desk with open notebook, keyboard, phone, glasses, and plants, blending productivity and workspace design.

Today, I sat down with Max Mullen, co-founder of Instacart, to dig into the craft of company culture with the precision it deserves. As a product leader, I’ve learned that culture is the operating system of the business—and Max’s journey from early generalist (running everything from product to payroll) to culture-focused executive offers a rare, tactical lens on how to build that OS with intent.

What struck me first was how deliberately he and the Instacart team approached company values. We unpacked the process behind defining distinctive principles—like “Every minute counts,”—and the mechanisms that ensure those values actually guide behavior. I shared how, on my own teams, we translate values into observable behaviors, interview rubrics, and operating rituals so they aren’t posters on a wall—they’re decisions in motion.

We then got practical about embedding values so employees truly feel connected to them. Max offered creative tactics that go beyond all-hands slides: narrative storytelling in onboarding, leader “value spotlights” in weekly reviews, and lightweight recognition loops that reward values-aligned choices. I added my playbook for hiring for values early on—using structured prompts, scenario-based assessments, and scorecards that map back to the behaviors we expect to see on day 30, 90, and 180.

From there, we dug into measuring culture—because what you don’t measure turns into mythology. We discussed using eNPS and pulse surveys, but also the importance of qualitative signals: skip-levels, anonymous async forms for hard feedback, and decision postmortems that reveal if incentives are aligned with stated values. I emphasized closing the loop publicly to build trust and make feedback feel consequential.

We also confronted the pitfalls that creep in as companies scale: easy-to-make founder mistakes, factions that emerge between early employees and newcomers, and the slow drift toward politics and bureaucracy. I shared a few guardrails I rely on: structured re-onboarding during hypergrowth, rotating “culture ambassadors” across functions, publishing decision logs for transparency, and codifying “how we decide” to reduce shadow politics.

The throughline is simple and powerful: founders and product leaders can and should take a deliberate role in shaping culture from day one. If you’re scaling now, run a quick audit: Are your values specific enough to create trade-offs? Do they appear in hiring, performance, and artifacts like PRDs and roadmaps? Can your newest team member explain how to live them in a tough decision? If not, you’ve found your next sprint.

You can follow Max on Twitter at @Max.

If you’re interested in learning more about how Cocoon makes employee leave easy, visit https://www.meetcocoon.com/


Inspired by this post on First Round.


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What is the key idea behind definable company values in the Culture Playbook?

Culture is the operating system of the business. The playbook shows how to translate distinctive values into observable behaviors, interview rubrics, and rituals so they guide decisions rather than sit as posters.

What practical tactics embed values in a growing company?

Practical tactics include narrative storytelling in onboarding, leader ‘value spotlights’ in weekly reviews, and lightweight recognition loops that reward values-aligned behavior. Hiring for values uses structured prompts, scenario-based assessments, and scorecards mapping to day 30, day 90, and day 180.

How is culture measured?

Culture is measured with eNPS and pulse surveys, complemented by qualitative signals like skip-levels and anonymous async feedback forms. Decision postmortems help reveal whether incentives align with stated values, and closing the loop publicly builds trust.

What guardrails help protect culture at scale?

Guardrails include structured re-onboarding during hypergrowth, rotating ‘culture ambassadors’ across functions, publishing decision logs for transparency, and codifying ‘how we decide’ to reduce shadow politics.

What pitfalls are discussed when scaling culture?

Factions between early employees and newcomers, founder mistakes, and the drift toward politics and bureaucracy.

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