Senior Software Engineer – Agent Developer Platform

Who We Are:

Alpaca is a US-headquartered, global leader in agent-first brokerage infrastructure for stocks, ETFs, options, crypto, fixed income, 24/5 trading, and more.

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 10 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 $400 million in funding from top-tier global investors including Portage Ventures, Spark Capital, Tribe Capital, Social Leverage, Horizons Ventures, Opera Tech Ventures, SBI Group, Derayah Financial, Unbound, Peak XV, Elefund, and Y Combinator.

Our Team Members:

We're a dynamic team of 400+ 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:

Your Role: We’re looking for a Senior Software Engineer to build the developer platform that agents and partners use to integrate and build on. You evolve Alpaca’s MCP servers, tools, and skills, and you build the APIs behind them.

You play a central role to define the architecture that provides the fastest time to market for integrators. Builders who embed Alpaca for their end users all use this surface.

This is a hands-on role. You will lead through architecture, code, design reviews, and mentorship, and you will ship the first version yourself. You will partner with Product, Compliance, Risk, and Platform Engineering teams.

Things You Get To Do:

• Design and build Alpaca’s agent-facing developer platform: MCP servers, tools, skills, and the APIs behind them.

• Evolve that platform as the MCP protocol and connector, plugin, and skill standards change.

• Build new APIs that make trading and account capabilities available to apps and agents.

• Decide which components the platform renders, so developers and partners build apps faster from shared building blocks.

• Keep Alpaca’s execution model current with the MCP protocol and with connector, plugin, and skill standards, and translate what changes into the application architecture of the developer platform.

• Own production reliability and quality for the services you build.

• Mentor engineers and raise the quality of design and implementation in this area.

Who You Are (Must-Haves):

• 5+ years of software engineering experience, with ownership of production systems that other developers use.

• Shipped a developer-facing API, SDK, or platform as a primary contributor.

• Enough MCP architecture to work with stateless and stateful behavior, and experience building to MCP, or to connector, plugin, or skill standards, as they have changed in production.

• Strong API design, including schemas, compatibility, and responses other developers can rely on.

• Proficiency in Python or TypeScript, and a willingness to work primarily in Go.

• Strong architectural judgment, with a record of shipping while requirements are still being defined.

• Clear communication with engineers, product, compliance, and risk partners.

Who You Might Be (Nice-to-Haves):

• Experience shipping developer-facing tools, SDKs, or MCP servers.

• Experience buildin...