Founding Engineer

About the team ArcaLabs builds AI agents that perform sell-side tasks (public comps, IC memos, pitchbook strip profiles, earnings comp analysis) end-to-end. We're partnered with some of the largest financial data providers, including FactSet and CapIQ. Our founding team previously built Arcafeed, a SaaS tool for buy-side analysts, which was acquired in late 2025. About the role We're hiring founding engineers to build the platform underneath ArcaLabs: the agent, the sandboxes they run it, the audit and eval systems, and the surfaces that investment bankers will live and work in. The work is half core systems, half AI engineering, half frontend, and entirely owned end-to-end. You'll ship code that runs inside the world's largest banks and PE firms. We're a small team, so your impact will be core to shaping our product & company. Some of the work you'll do: Build and own components of our agent runtime including retrieval, memory, evals, and potentially more core AI work with RL & data (building rubrics, etc.). Build infrastructure for our agents and agentic workflows: sandboxes, VMs, lifecycle management, security, observability, data pipelines, and more. Work on evals and observability for our agents and agentic workflows, so that we can ship better agents faster. Deploying our products in actual customer environments. Act as a foundation for our forward deployed engineering and sales teams by hardening the patterns that show up across multiple customers into shared platform features. You might be a fit if you Have software engineering experience with a strong track record shipping production systems. Are fluent in Python and TypeScript; have shipped agent-driven features. Care about the quality of the deliverable, not just the quality of the code; you'd rather ship a working comps file than a beautiful abstraction. Have worked on evals, agent architecture, ML, data, and systems, and are excited to put them into a system bankers actually use. Bonus points Prior experience in fintech, capital markets, or financial data infrastructure. Prior experience building with systems languages like Go or Rust. Experience deploying enterprise SaaS into financial institutions (SOC 2, single tenant, customer-managed keys) with AWS. We deploy our own platform and customer stacks via IaC. Compensation $135K – $250K+ along with meaningful equity (0.15% - 2%+). Our team is based in Palo Alto, and we'd prefer you to be local, but we're open to remote candidates. About ArcaLabs ArcaLabs is the official FactSet AI Partner, building AI agents that run sell-side workflows for investment banks and PE funds. We're the team behind Arcafeed (acquired) and we're hiring the founding squad in Palo Alto. We believe AI will widen, not narrow, the set of people who can do high-end finance work. We want to ship that future. Equal opportunity ArcaLabs is an equal opportunity employer. We hire based on merit, and we accommodate applicants with disabilities. If you need accommodation during the hiring process, email careers@arcalabs.ai. Show more Show less