How engineers at Nextdoor apply Codex to build without limits
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On Nextdoor’s core platform team, Codex investigates issues and puts product engineers in the driver’s seat.
Key facts
- A product like Nextdoor, which serves over 110 million users across 11 countries, puts many demands on a platform team
- With GPT‑5.4 and 5.5, it’s been a impressive upgrade
- About Fast Mode with Codex and GPT‑5.5, Dolphin says, “The reporter has got to be honest, a lot of the team are addicted to it
- On Nextdoor’s core platform team, Codex investigates issues and puts product engineers in the driver’s seat
Summary
A product like Nextdoor, which serves over 110 million users across 11 countries, puts many demands on a platform team. This means that individual engineers move up the stack—no longer locked up as specialists in a certain system or framework, they’re able to own the product experience more or less end-to-end, even across multiple platforms. With Codex, “engineers get to spend a lot less time thinking about exactly how they build, and more time thinking about the outcome,” Dolphin explains. Nextdoor recently released Opportunity Alerts, which let people find service providers near them; with Codex, engineers are driving the product experience and roadmap.