Staff Fullstack Engineer

We are seeking a Staff Full Stack Engineer to lead the technical direction of the team that builds Alpaca's Trading API product. Trading API serves developers, traders, and institutions who trade directly with Alpaca. The team owns that customer experience end to end: how customers access the platform, how their accounts are structured and secured, and the applications they use to trade.

The work spans the stack: customer-facing trading applications, the identity, account, and permission systems behind them, and integrations for partner apps and AI agents. The team also builds customer-facing trading features end to end, across our API.

This is a high-trust domain. These systems decide who can act on an account and what they are allowed to do. A defect can expose customer data, let the wrong person place a trade or move money, or lock a customer out at the moment they need to trade. The customer-facing surfaces also carry real-time trading: an order ticket or positions view that shows stale or wrong data can lead to a bad trade. We are looking for an engineer who has built and owned systems like this — identity and authorization, account models, and trading or financial applications — and who is as comfortable designing an authorization model as shipping the interface built on top of it.

You will not manage people directly. You will lead through architecture, code, design reviews, and mentorship, and you will remain a principal contributor. You will be the senior technical anchor for the team, partnering with the engineering manager, Product, and Design, and working closely with the trading, margin and risk, and platform teams behind the API.

Key Responsibilities

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