Mobile Engineer

The world of digital assets is accelerating in speed, magnitude, and complexity, opening the door to new ways for leveraging the blockchain. Fireblocks’ platform and network provide the simplest and most secure way for companies to work with digital assets and it trusted by some of the largest financial institutions, banks, globally-recognized brands, and Web3 companies in the world, including BNY Mellon, BNP Paribas, ANZ Bank, Revolut, and thousands more. As part of Fireblocks, Dynamic represents the next evolution of non-custodial wallet infrastructure. Dynamic is Fireblocks’ embedded wallet platform, purpose-built for developers who want to bring crypto and stablecoin experiences into modern applications without complexity. Together, Fireblocks and Dynamic are building the most complete, secure, and developer-friendly wallet infrastructure in the industry by combining institutional-grade security with consumer-grade experiences. About the Team Dynamic was founded in 2021 with a simple vision: every app and website will have a wallet component. That vision is rapidly becoming reality. Wallets are no longer limited to crypto-native products, they are becoming foundational infrastructure for payroll, remittances, and global payments. Dynamic powers wallet-based experiences for leading crypto and fintech teams including Kraken, zerohash, Magic Eden, and more. Dynamic builds and maintains developer-first SDKs that enable teams to seamlessly integrate embedded wallet functionality directly into their applications. These embedded wallets allow end users to create, manage, and use wallets without leaving the product experience, making wallets feel like a native part of modern fintech and crypto apps. As part of Fireblocks, the Dynamic team continues to build and scale the infrastructure and developer tooling that has onboarded 50M+ wallets across crypto and fintech applications. In this context, Dynamic powers the application-layer wallet experience and developer tooling, complementing Fireblocks’ core custody, security, and transaction infrastructure. The team operates with a strong product mindset and deep focus on security, reliability, scalability, and exceptional developer experience. Engineers at Dynamic build secure-by-default systems and approach their work with a strong customer focus, balancing technical excellence with real-world user needs. You will be joining a passionate group that moves fast, works with the biggest names in payments and fintech, and is defining how the next generation of financial applications are built. What You’ll Do 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 What You’ll Bring 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 Big Advantages 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. For employees hired to work from our NYC HQ, Fireblocks is required by law to include a reasonable estimate of the compensation range for this role. This range is specific to New York City, and takes into consideration a wide range of factors that are reviewed when making a hiring decision, such as years of experience, skills, and other business needs. It is not typical for a candidate to be hired at or near the top of the pay range and each compensation decision is dependent on each individual case. A reasonable base salary range estimate for this position is $177,000 to $230,000. The base salary is one component of the total compensation package, which for some roles may include a target bonus, a very competitive equity grant, and very generous benefits. While we believe competitive compensation is a critical aspect of you deciding to join us, we do hope you also spend time considering why our mission and culture are right for you. We are creating something transformational here, and we hope you are as excited about the future as we are.Fireblocks' mission is to enable every business to easily and securely access digital assets and cryptocurrencies. In order to do that, we strongly believe our workforce should be as diverse as our clients, and this is why we embrace diversity and inclusion in all its forms.  Please see our candidate privacy policy here.