Fireblocks Mobile Engineer (Remote)

Senior Mobile Engineer for Fireblocks, building embedded wallet SDKs. Remote in Americas time zone. Part of Dynamic, with 50M+ wallets onboarded.

Design and implement high-quality native mobile SDKs for embedded wallet functionality, focusing on API ergonomics, performance, and reliability. Own SDK features end-to-end: API design, architecture, implementation, testing, release, versioning, and documentation. Build secure SDK components for wallet operations, including cryptographic operations and blockchain interactions. Define and evolve SDK architecture for maintainability and backward compatibility. Create sample apps, demos, and comprehensive documentation. Collaborate with developer relations and support teams. Establish best practices for testing, observability, releases, and code health.

5+ years of software engineering experience with deep focus on mobile development and shipping production-grade SDKs. Proven track record of building and shipping high-quality code. Strong hands-on experience with iOS (Swift) and/or Android (Kotlin); experience with React Native or other cross-platform frameworks. Experience building mobile SDKs or shared libraries, including API design, versioning, packaging, and long-term maintenance. Experience with blockchain-enabled mobile systems, including wallet flows, signing, and on-chain interactions. Experience with security-sensitive mobile software (key management, secure storage, cryptography, or financial products). Strong grasp of mobile engineering best practices including CI/CD, automated testing, release management, and observability.

Remote role in a distributed team; preference for candidates in the Americas time zone.