Senior Product Manager B2B Crypto Infrastructure

You will lead the product lifecycle for Crypto-as-a-Service and own API quality, integration reliability, and transaction fulfillment at scale. You will define and evolve APIs, SDKs, onboarding flows, sandbox environments, and technical documentation. You will scale on-chain transaction fulfillment including signing, gas management, wallet orchestration, and transaction queuing across multiple chains. You will write detailed PRDs, collaborate with engineering on architecture and payloads, and work with Compliance, Legal, Payments, and Fraud to optimize KYC/AML and risk controls. You will drive iterative development using partner usage, API analytics, and continuous testing, and act as the internal subject matter expert on payments, APIs, crypto rails, and integration best practices.

Responsibilities

• Own the full product lifecycle of Crypto-as-a-Service with emphasis on API quality, integration reliability, transaction fulfillment, and partner success
• Define and evolve APIs, SDKs, onboarding flows, sandbox environments, and technical documentation
• Scale on-chain transaction fulfillment including signing infrastructure, gas management, wallet orchestration, and transaction queuing across multiple chains
• Write detailed PRDs that include sequence diagrams, error states, edge-case handling, and compliance requirements
• Collaborate with engineering on architecture decisions, payload structures, rate limiting, and event sequencing
• Work with Compliance, Legal, Payments, and Fraud to optimize KYC/AML flows, chargeback handling, and risk controls
• Drive iterative development cycles based on partner usage, API analytics, and continuous testing
• Serve as the internal subject matter expert on payments, APIs, crypto rails, and integration best practices

Requirements

• 5+ years of product management experience in crypto or fintech
• Hands-on experience scaling crypto transaction fulfillment or orchestration infrastructure at a major exchange or crypto infrastructure provider
• Understanding of exchange infrastructure including treasury management and liquidity operations
• Strong understanding of blockchain settlements and infrastructure including signing, broadcasting, gas and fee management, confirmation tracking, and error recovery
• Experience building or supporting API-first B2B products including REST APIs, SDKs, and webhooks
• Ability to read logs, troubleshoot API failures, inspect JSON payloads, and guide partner engineers through integration issues
• Demonstrated history of leading partner-facing integrations from onboarding to launch
• High attention to detail in writing specs, mapping edge cases, and defining testing requirements
• Experience working closely with engineering teams and discussing architecture, dependencies, and system constraints
• Familiarity with agile methodology, technical documentation practices, and rapid iteration
• Tools experience with Postman, API consoles, Jira, Confluence, and analytics platforms such as Amplitude or Mixpanel