Commercial/Transactional Lawyer

OUR MISSION Rebuild how the world works, to make institutions work better for the people they serve. ABOUT BRAIN CO. Brain Co. builds AI-native operating systems for large, regulated institutions. Each system is built for a specific industry, powered by agents that push real workflows forward. Underneath it all is Atlas, our proprietary platform that keeps customers in control, secure by design, and never locked into one model. WHY NOW Brain Co. is entering its next phase of production deployments on a national scale with an elite team built from Palantir, Google, Meta, and Nvidia, and a growing footprint across government, insurance, health, and financial services. Joining now means shaping both the company and a new category of applied AI. Every project here ships to production and is expected to create measurable customer value and impact. You'll work alongside exceptional peers on some of the hardest problems in applied AI. It’s the kind of work you'll still be proud of in ten years from now. 𝗔𝗯𝗼𝘂𝘁 𝘁𝗵𝗲 𝗥𝗼𝗹𝗲 Brain Co. is building an AI-powered legal work surface for a large global investment organization. The product is intended to help in-house lawyers manage legal work across matters, emails, documents, playbooks, prior transactions, external counsel outputs, and internal systems. We are looking for an experienced commercial or transactional lawyer to join us as a part-time domain expert. You will work directly with our product and engineering teams to help us understand how experienced lawyers review agreements, evaluate risk, use precedent, make negotiation decisions, and manage matters from intake through signing and post-close follow-up. Initially, the role will focus heavily on structured working sessions with the team. We will ask you to walk through legal workflows, answer domain questions, challenge product assumptions, and help us distinguish legally meaningful issues from details that do not materially affect a lawyer's decision. Over time, the role will also include reviewing AI-generated outputs, developing evaluation criteria, creating benchmark examples, and producing high-quality ground-truth data for model training and evaluation. We are looking for someone who can commit approximately 5–10 hours per week for an initial 3–4 months, with the opportunity to extend based on mutual interest and project needs. Scheduling can be flexible and designed to work alongside an existing role or legal practice. 𝗪𝗵𝗮𝘁 𝗬𝗼𝘂 𝗪𝗶𝗹𝗹 𝗗𝗼 • Help us understand real legal workflows — Walk the team through how legal requests arrive, how matters are organized, how documents are reviewed, how questions are escalated, and how decisions and rationale are preserved. • Answer nuanced legal and product questions — Provide practical guidance to product managers and engineers on commercial agreements, matter workflows, risk assessment, negotiation strategy, and legal operations. • Review product concepts and workflows — Evaluate whether proposed AI experiences reflect how lawyers actually work and identify missing steps, edge cases, or unrealistic assumptions. • Explain legal judgment — Help us understand not only what a clause says, but why a lawyer might accept it, reject it, propose a redline, seek additional context, or escalate it for approval. • Review AI-generated outputs — Assess summaries, issue identification, clause classifications, redline recommendations, obligation extraction, precedent retrieval, and other AI outputs for correctness, usefulness, and appropriate legal reasoning. • Develop evaluation rubrics and benchmarks — Help define what a high-quality output looks like and create representative examples that can be used to train, test, and improve our AI systems. • Generate high-quality ground-truth data — Review agreements and related materials, label legally relevant information, document the supporting evidence, and provide concise written reasoning for your conclusions. • Help us model instituti…