Mobile Engineer

Stack

Responsibilities

• ▹Design and implement high-quality native mobile SDKs for embedded wallet functionality, with a strong focus on API ergonomics, performance and reliability
• ▹Own SDK features end-to-end: API design, architecture, implementation, testing, release, versioning and documentation
• ▹Build and maintain secure, reliable SDK components for cryptographic operations and blockchain interactions
• ▹Define and evolve the SDK architecture for long-term maintainability and backward compatibility
• ▹Build sample apps and demos showcasing SDK capabilities as integration references
• ▹Create clear, comprehensive SDK documentation and integration guides
• ▹Work with developer relations and support teams to address customer integration challenges
• ▹Establish best practices around testing, observability, releases and code health

Requirements

• ▹5+ years of software engineering experience with a deep focus on mobile development and shipping production-grade SDKs
• ▹Demonstrated track record of building and shipping high-quality code
• ▹Strong hands-on experience with iOS (Swift) and/or Android (Kotlin); React Native or other cross-platform framework familiarity is a plus
• ▹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, financial products)
• ▹Strong grasp of mobile engineering best practices (CI/CD, automated testing, release management, observability)
• ▹A get-things-done mindset with the ability to independently own problems
• ▹B.Sc. in Computer Science/Engineering or equivalent practical experience
• ▹Remote role in a distributed team; preference for candidates in the Americas time zone

Nice to have

• ▹Rust and/or WebAssembly (Wasm) experience, particularly for cross-platform SDKs
• ▹Experience designing shared core logic used across iOS and Android
• ▹Experience with advanced mobile security primitives (secure hardware, MPC, low-level crypto)
• ▹Prior experience owning or founding a mobile platform or SDK from scratch

Soft skills

What we offer

• ▹Target bonus and competitive equity grant as part of total compensation

About the company

Fireblocks is the leading platform for securing digital assets, trusted by some of the world's largest financial institutions, banks and Web3 companies, including BNY Mellon, BNP Paribas, ANZ Bank and Revolut. Dynamic (founded 2021, now part of Fireblocks) builds embedded wallet infrastructure for developers and has onboarded over 50 million wallets to date.