Co-Founder / Founding Engineer for an agentic M&A service start-up based in SF & NYC

Job description

About Us We - the Stealth Angel Collective - are a collective of experienced entrepreneurs investing our time, capital, and operational expertise to build the next generation of a high-impact ventures . Having scaled companies to hundreds of employees and multiple exits, we provide far more than funding — we work shoulder-to-shoulder with founders to accelerate learning cycles, open doors, and help avoid common early-stage pitfalls. One of the latest companies we are invested in is MaTrx , founded by two bankers from elite Wall Street M&A boutiques who have advised on 50+ transactions between them. The Company MaTrx is an AI-native investment bank, who advises founders and owners of lower middle market businesses ($1M to $10M EBITDA) on M&A, capital raising, and restructuring, with coverage in life sciences, technology, and financial services. They have closed mandates, live sell-side processes, and paying clients today. This is a Day 1 venture , supported by highly experienced entrepreneuers, industry experts and business angels. The Opportunity The lower middle market is the largest and worst served segment in M&A. Real banks cannot make the economics work below roughly $50M in enterprise value, so what is left is a long tail of brokers who mostly cannot run a real process. Owners who spent thirty years building something end up with a one page teaser and a buyer list pulled from a directory. Our thesis is that most of the work is automatable . Sourcing, diligence coordination, buyer identification, materials drafting, and process management absorb the majority of a junior banker's hours and almost none of them require judgment a well-designed system cannot handle. If one banker can run five mandates instead of one, institutional quality advisory becomes viable at deal sizes that have never supported it. Tasks As Co-Founder / Founding Engineer , you will own the technical build together with the other founders — from architecture to production. You will design, build, and iterate the agent systems that run real mandates, the data layer underneath them, and the security posture required to hold up to institutional diligence. You will: Own the technical direction and architecture of the first product together with the other founders — from prototype to production. Build the core agent systems and data layer, including company universes, buyer graphs, comps,…