Security Engineer

Job description

About the Role You'll be the first security engineer at a company processing millions of sensitive data points across AI training pipelines, expert payments, and enterprise integrations. This is not a monitoring role. You'll build the systems that keep Mercor secure - writing detection logic, automating response workflows, hardening infrastructure, and shipping security tooling that scales with a company growing faster than most teams can keep up with. We use AI heavily in our own security work. You should be comfortable building alongside AI code-gen tools, using LLMs to accelerate threat analysis, and automating away the repetitive work that slows security teams down. If you're the kind of engineer who writes a script instead of filing a ticket, you'll fit in here. We're in-person five days a week at our SF headquarters, with first Fridays remote. What You'll Build: Detection and response pipelines that catch real threats, not checkbox alerts Security automation that replaces manual processes - if you're doing something twice, automate it Infrastructure hardening across AWS, Kubernetes, and our production environment Identity and access controls for a platform serving 300K+ exper...