Staff Software Engineer

Cybersecurity titans are born when a new attack vector overwhelms existing defenses. When ransomware ran rampant, CrowdStrike emerged as the category leader for securing user endpoints. Today, AI has made account compromise the #1 cybercrime . LLM-powered phishing messages get past email security, allowing attackers to compromise accounts and exfiltrate sensitive data in minutes. Incumbents can't keep up. They catch these attacks late, or miss them altogether.

Enter Petra, security for when no perimeter remains. We are building an AI-driven Detection and Response platform to catch and remove attackers before they can act.

We've grown very quickly, reaching mid-7-figures in ARR in under a year — we now protect over 1.6 million users across 10,000+ businesses. We win 90%+ of head-to-heads. We price premium, yet have extremely low customer churn. Our customers consistently tell us that Petra is the best product they've ever used . You can see a demo here .

Our founders are YC W24, ex-Abnormal Security, Palo Alto Networks, and Bridgewater.

Ownership is everything here. You'll have deep knowledge across the stack and own large parts of the platform — from our AI detection pipeline to the product surfaces that MSPs and security teams rely on every day.

Petra is a premium product and it's everyone's job to make sure it stays that way. That means you won't just write code — you'll talk to customers, map their workflows, find their time-sinks, and think creatively about how to make the product increasingly excellent.

Concretely, you will: