Senior Software Engineer, Backend (Developer - X402)

Details

At Coinbase, our mission is to increase economic freedom in the world by building the emerging onchain platform and the future global financial system. The x402 protocol is an open, internet-scale standard designed to make global payments as seamless as sending an email. As part of the Coinbase x402 team you will help define and evolve this protocol, build 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.

Coinbase is remote-first but not remote-only; in-person participation is required throughout the year (team and company-wide offsites are held multiple times annually). The team culture is intensive and collaborative; candidates should be passionate about crypto and open standards and willing to work on hard technical problems.

Responsibilities

• Define the x402 protocol standard for internet-native payments.
• Build and maintain x402-related products (x402 SDK, Payment MCP, Payment Facilitators, onchain payment protocols).
• Build scalable, secure backend systems and SDKs that interoperate with frontend teams and external integrators.
• Collaborate with open-source contributors to evolve the standard via GitHub discussions, issues, and PR reviews.
• Contribute to developer tools, payment infrastructure, and integrations that enable onchain payments at scale.

Requirements

• 6+ years of experience in software development with a strong focus on backend development and close collaboration with frontend engineers.
• Strong experience building scalable and secure software and SDKs.
• Proficiency with Golang, TypeScript, and Python.
• Knowledge of Web3 technologies, stablecoins, smart contracts, and wallets.
• Comfort contributing to and maintaining open-source projects; experience with GitHub workflows (issues, PRs, reviews).
• Passion for cryptocurrency, onchain payments, and open standards; willingness to engage with community contributors.

Nice to haves

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

Compensation & Additional Info

• Pay Range: $191,100 — $191,111 CAD (target annual salary). Full-time offers from Coinbase also include bonus eligibility, equity eligibility, and benefits (medical, dental, vision).
• Job #: GDBE05US
• Answers to crypto-related questions may be used to evaluate onchain experience.
• Coinbase provides reasonable accommodations for applicants with disabilities and is an Equal Opportunity Employer.

Benefits

• Extended health care (coordinates with provincial coverage), dental, vision
• Consult+ (virtual health care)
• Life & accident insurance, disability coverage
• Employee Stock Purchase Plan (ESPP)
• Wellness stipend, mobile/internet reimbursement, connections stipend
• Learning and development allowance, employee assistance program
• Travel medical policy (global), fertility benefits, generous time off/leave policy