Help us bring breakthrough science to patients sooner.
Cosign AI is a team of physicians and machine learning engineers on a mission to eliminate the single greatest bottleneck in clinical research — patient recruitment. We build AI tools that work inside the clinical workflow, giving investigators real-time access to the right patients at the right time.
If you're passionate about healthcare, AI, and making a tangible difference in how quickly patients access breakthrough therapies, we'd love to hear from you.
Work that matters
Every line of code, every feature — ultimately connected to a patient getting into a trial sooner.
Real-world impact
Our tools are used by clinicians and research teams today. You'll see your work deployed and making a difference — not sitting in a roadmap backlog.
Founding team culture
We're a small, high-ownership team. You'll work directly with the founders, move fast, and have a meaningful voice in what we build and how we build it.
Clinical AI at the frontier
We operate at the intersection of clinical practice and machine learning — applying LLMs, EHR integration, and real-time AI to problems that matter in healthcare.
San Francisco, CA
We're based in San Francisco. Our team works fully remotely, with the flexibility that modern startups require.
Help us build the future of clinical AI
We look for talented, driven people who care deeply about solving important problems. If you’re passionate about clinical AI and want to create technology that makes a genuine difference, we’d love to hear from you.