17th Street Labs is a founder-led AI engineering and security research firm. Small by design, direct by default, and built for work where judgment matters more than headcount.
Two people, one firm. You get both on every engagement.
Co-founder, chief executive officer
Marina sets the operating direction for 17th Street Labs. She shapes ambitious technical work into focused engagements with a clear scope, a steady cadence, and an outcome we can be held to. If an engagement is going well, that is usually her doing.
Co-founder, principal AI engineer
Engineer, educator, founder, and technical leader with more than twenty-five years across production systems, developer platforms, AI applications, evaluation infrastructure, and offensive and defensive AI security. He grew one platform organization from six engineers to sixty and has shipped systems used by fifty million people. He still writes the code on every engagement.
dan@danlevy.netThree convictions that show up in every piece of work.
A fluent demo is not a reliable system. We design measurement that survives scrutiny from your engineers, your customers, and your auditors.
Permissions, boundaries, data flows, and failure recovery belong in the design. Bolting them on at launch is how agents end up in the news.
The engagement pays off when your team leaves with sharper systems and stronger judgment, and does not need us for the next change.