Senior Software Engineer, Backend (developer - X402)

Coinbase Developer Platform

Coinbase Developer Platform (CDP) is building the developer tools to bring the world onchain. Today, onchain development is slow, risky, and painful, even for the most experienced onchain developers. Our goal is to bring a million developers onchain by creating an easy to use and trusted developer experience. We build API and SDK products for developers like wallets, paymaster, staking, stablecoins, onchain data, and more. We are a small team that moves like a startup at Coinbase, with a fast pace, strong ownership culture, and a relentless commitment to making developers happy. At Coinbase, we are building the future of internet-native payments. The x402 protocol is at the core of this mission, an open, internet-scale standard designed to make global payments as seamless as sending an email. As part of the Coinbase x402 team, you'll help define and evolve this protocol alongside the broader open-source community, while also building the developer tools, SDKs, and payment infrastructure that bring x402 to life. This is a high-impact role at the intersection of crypto, payments, agentic commerce, and open standards, shaping how money moves on the internet for the next decade.

What you'll be doing:

• Defining the x402 protocol standard for the internet-native payment protocol
• Building and maintaining x402 related products such as the x402 SDK, Payment MCP, Payment Facilitators, and onchain payment protocols.
• Collaborating with open-source contributors to evolve the standard through GitHub discussions, issues, and PR reviews.

What we look for in you:

• 6+ years of experience in software development with a strong focus on backend development working closely with frontend engineers; crypto experience is a plus
• Strong experience in building scalable and secure software and SDKs
• Proficiency with Golang, Typescript, and Python
• Knowledge of Web3 technologies, stablecoins, smart contracts, and wallets

Nice to haves:

• Experience with AI and emerging AI protocol standards (MCP, A2A)
• Track record of building and maintaining impactful open-source projects

Pay Transparency Notice: Depending on your work location, the target annual salary for this position can range as detailed below. Full time offers from Coinbase also include bonus eligibility + equity eligibility + benefits (including medical, dental, vision and 401(k)). Pay Range: $186,065—$218,900 USD

Commitment to Equal Opportunity Coinbase is proud to be an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, creed, gender, national origin, age, disability, veteran status, sex, gender expression or identity, sexual orientation or any other basis protected by applicable law. Coinbase will also consider for employment qualified applicants with criminal histories in a manner consistent with applicable federal, state and local law.