Senior Software Engineer, Backend (Developer - X402)

Details

At Coinbase you will help build the emerging onchain payments platform and the x402 protocol — an open, internet-scale standard designed to make global payments as seamless as sending an email. This role sits at the intersection of crypto, payments, agentic commerce, and open standards, and involves both designing protocol standards and building developer-facing products and infrastructure.

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). Full-time offers include bonus eligibility, equity eligibility, and benefits (medical, dental, vision, 401(k), etc.).

Responsibilities

• Define and evolve the x402 protocol standard for internet-native payments.
• Build and maintain x402-related products such as the x402 SDK, Payment MCP, Payment Facilitators, and onchain payment protocols.
• Collaborate with open-source contributors to evolve the standard through GitHub discussions, issues, and PR reviews.
• Build scalable, secure backend systems and SDKs that integrate with frontend consumers and onchain infrastructure.

Requirements

• 6+ years of software development experience with a strong focus on backend development and working closely 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.
• Comfortable collaborating in open-source workflows (GitHub discussions, issues, PR reviews).
• Willingness to participate in in-person team activities and offsites as required.

Nice to haves

• Experience with AI and emerging AI protocol standards (MCP, A2A).
• Track record of building and maintaining impactful open-source projects.
• Crypto/onchain experience will be used to evaluate onchain knowledge (answers to crypto-related questions may be used in screening).

Compensation and Benefits

• Pay Range: $186,065 — $218,900 USD (target annual salary; full-time offers also include bonus, equity, and benefits).
• Benefits include medical, dental and vision plans, Health Savings Account with company contributions, disability and life insurance, 401(k) with company match, wellness stipend, mobile/internet reimbursement, connections stipend, volunteer time off, fertility counseling and benefits, generous time off/leave policy, and the option of getting paid in digital currency.

Other notes

• Job #: GDBE05US
• Coinbase is an Equal Opportunity Employer and provides reasonable accommodations for applicants with disabilities. Selected roles may participate in AI pilot tools for interview simulations; a human recruiter reviews interview responses.