Note: The job is a remote job and is open to candidates in USA. Fireblocks is a leading platform for digital assets, providing secure solutions for companies to work with blockchain technology. The Mobile Engineer will design and implement high-quality native mobile SDKs, focusing on API ergonomics, performance, and reliability, while also ensuring the security and reliability of wallet operations.

Responsibilities

• Design and implement high-quality native mobile SDKs that enable developers to integrate embedded wallet functionality into their applications, with a strong focus on API ergonomics, performance, and reliability
• Own SDK features end-to-end: from API design and architecture, through implementation and testing, to release, versioning, and developer documentation
• Build and maintain secure, reliable SDK components for wallet operations, including cryptographic operations, blockchain interactions, and security-sensitive flows
• Define and evolve the SDK architecture to support long-term maintainability, backward compatibility, and adoption across diverse customer applications
• Build sample applications and demos that showcase SDK capabilities and serve as integration references for customers
• Create clear, comprehensive SDK documentation and integration guides
• Work with developer relations and support teams to address customer integration challenges
• Raise the bar for quality and operational excellence by establishing best practices around testing, observability, releases, and code health
• Contribute to a culture of ownership and execution, leading by example through hands-on work, code reviews, documentation, and knowledge sharing

Skills

• 5+ years of software engineering experience, with deep focus on mobile development and shipping production-grade SDKs
• Demonstrated track record of building and shipping high-quality code, with work you can point to and discuss in depth
• Strong hands-on experience with iOS (Swift) and/or Android (Kotlin); experience with React Native or other cross-platform frameworks, and familiarity with all
• Experience building mobile SDKs or shared libraries, including API design, versioning, packaging, and long-term maintenance across platforms
• Experience with blockchain-enabled mobile systems, including wallet flows, signing, and on-chain interactions
• Experience working on security-sensitive mobile software, such as key management, secure storage, cryptography, or financial products
• Strong grasp of mobile engineering best practices, including CI/CD, automated testing, release management, and observability
• A get-things-done mindset with the ability to independently own problems and deliver end-to-end solutions
• Comfortable making long-term architectural decisions while remaining pragmatic and adaptable
• B.Sc. in Computer Science / Engineering or equivalent practical experience
• Remote role in a distributed team; preference for candidates in the Americas time zone
• Rust and/or WebAssembly (Wasm) experience, particularly building cross-platform SDKs consumed by mobile apps
• 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

Company Overview

Company H1B Sponsorship