Software Engineer - Wallets

Rain

1 day
Remote $220K – $270K • Offers Equity • Offers Bonus
Software Engineer Crypto Cryptography Distributed Systems Blockchain Fintech Engineering Full-time Remote Senior Custody Confidential Computing Authentication Authorization Threat Modeling Secrets Management API Design Policy Engines Wallet Infrastructure Transaction Signing Wallets Blockchain Infrastructure Key Management Individual Contributor MPC TEEs HSMs Architectural Design Secure Computing Secure Enclaves ECDSA EdDSA Distributed Key Generation Threshold Cryptography Threshold Signatures Hardware-Backed Key Isolation EOAs Smart Contract Wallets Account Abstraction ERC-4337 Multichain Infrastructure Recovery Account Recovery Programmable Authorization
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Our company

  • Rain

Your position

  • Software Engineer - Wallets

Requirements

  • Design secure, scalable wallet infrastructure for custody, key management, transaction signing, authorization, and recovery.
  • Develop flexible signing infrastructure (MPC, HSMs, secure enclaves, TEEs, emerging cryptographic approaches).
  • Build wallet systems across account models: EOAs, smart contract wallets, account abstraction, ERC-4337, embedded wallets, multichain.
  • Define the boundaries between cryptography and wallet orchestration (keys, signing authority, transaction policies, permissions, authorization).
  • Architect security-critical key management (generation, distributed generation, storage, rotation, backup, recovery, hardware-backed isolation).