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Rain is a global stablecoin payments platform serving enterprises, neobanks, platforms, developers, and AI agents. The company enables partners to move, store, and use stablecoins instantly and compliantly through global payment cards, rewards, on/offramps, wallets, and cross-border rails. As a Visa and Mastercard Principal Member, Rain issues cards accepted at over 175 million merchant locations across 220+ countries. The company recently closed a $250M Series C in January 2026 at a $1.95B valuation, backed by ICONIQ, Sapphire Ventures, Dragonfly, Bessemer Venture Partners, and others.
The Wallets team is building next-generation wallet infrastructure supporting both custodial and non-custodial architectures. The team tackles foundational problems in cryptography, key management, secure computing, and blockchain wallet infrastructure rather than integrating existing SDKs.
In this role, you will own the architecture of Rain's wallet infrastructure, designing secure, scalable systems for custody, key management, transaction signing, authorization, and recovery. You'll design flexible signing infrastructure supporting MPC, HSMs, secure enclaves, TEEs, and emerging cryptographic approaches. You'll build wallet systems across multiple account models including EOAs, smart contract wallets, account abstraction, ERC-4337, embedded wallets, and multichain infrastructure. You'll define boundaries between cryptography and wallet orchestration, architect security-critical key management systems, and build highly available signing and transaction infrastructure for high-value customer assets. You'll set technical direction for wallet security including threat modeling, policy engines, secrets management, and programmable authorization, and make foundational build-vs.-buy decisions across cryptography, custody, and security infrastructure.
Rain operates with an open, flat structure where team members at all levels have freedom to explore ideas and impact roadmap and vision. The company offers unlimited time off (10-day minimum), flexible working arrangements, comprehensive health/dental/vision coverage (95% for US employees), 401(k) with 4% match, and equity for all employees.
