Senior Full-Stack Engineer - Broker API (Partner-Facing Application)

Who We Are: Alpaca is a US-headquartered self-clearing broker-dealer and brokerage infrastructure for stocks, ETFs, options, crypto, fixed income, 24/5 trading, and more. Our recent Series D funding round brought our total investment to over $320 million, fueling our ambitious vision. Amongst our subsidiaries, Alpaca is a licensed financial services company, serving hundreds of financial institutions across 40 countries with our institutional-grade APIs. This includes broker-dealers, investment advisors, wealth managers, hedge funds, and crypto exchanges, totalling over 9 million brokerage accounts. Our global team is a diverse group of experienced engineers, traders, and brokerage professionals who are working to achieve our mission of opening financial services to everyone on the planet . We're deeply committed to open-source contributions and fostering a vibrant community, continuously enhancing our award-winning, developer-friendly API and the robust infrastructure behind it. Alpaca is proudly backed by top-tier global investors, including Portage Ventures, Spark Capital, Tribe Capital, Social Leverage, Horizons Ventures, Unbound, SBI Group, Derayah Financial, Elefund, and Y Combinator. Our Team Members: We're a dynamic team of 380+ globally distributed members who thrive working from our favorite places around the world, with teammates spanning the USA, Canada, Japan, Hungary, Nigeria, Brazil, the UK, and beyond! We're searching for passionate individuals eager to contribute to Alpaca's rapid growth. If you align with our core values—Stay Curious, Have Empathy, and Be Accountable—and are ready to make a significant impact, we encourage you to apply. Your Role: As a Senior Full-Stack Engineer, you will be responsible for designing, implementing, and maintaining systems and services that form the foundation of Alpaca and empower millions of users who trade billions of dollars worth of assets. The Broker API Team builds and maintains the Broker API Dashboard, a user-facing platform that helps partners track performance, manage operations, and access the features they need to support their users. We work closely with internal teams and partners to understand real-world needs and turn them into reliable, easy-to-use tools that improve efficiency and provide better visibility into their operations. For this role, we seek an experienced Senior Fullstack engineer dedicated to delivering seamless and high-quality software solutions for our partners. The ideal candidate has a proven track record of designing and building scalable applications and is comfortable challenging conventions and advocating for innovative solutions. In this position, you will have the autonomy to architect and implement solutions that meet our strategic objectives, while also actively contributing to the goal-setting process alongside a collaborative, cross-functional team. Things You Get To Do: Take ownership of high-visibility, high-impact initiatives with autonomy and accountability. Work across domains to build features end to end, gaining exposure to the full spectrum of Alpaca’s infrastructure. Stay deeply connected to the needs of our partners, building tools that streamline workflows and reduce manual effort. Play a key role in helping our partners succeed providing world-class customer support. Drive architectural design conversations, helping shape scalable, intuitive, and reliable systems. Collaborate closely with cross-functional teams to deliver impactful solutions. Opportunity to contribute to API design and product features within our ecosystem A unique opportunity to mentor other developers and contribute to the overall technical strategy of our company. Who You Are (Must-Haves): 5+ years of experience in full-stack development with TypeScript/React. Proficient in TypeScript and React. Proficient in at least one modern systems programming language like Golang or C#. Proficient in HTML and CSS frameworks such as TailwindCSS. Excellent commun