Fullstack Engineer, Embedded Wallet

As a Fullstack Engineer for the Embedded Wallet team at Fireblocks, you design and build native mobile SDKs that enable developers to integrate embedded wallet functionality directly into their applications. You join Dynamic, Fireblocks' embedded wallet platform, which powers wallet-based experiences for leading crypto and fintech teams including Kraken, zerohash, and Magic Eden. The team has onboarded 50M+ wallets across crypto and fintech applications and operates with a strong focus on security, reliability, scalability, and exceptional developer experience.

What you'll do

• Design and implement high-quality native mobile SDKs that enable developers to integrate embedded wallet functionality, 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 bring

• 5+ years of software engineering experience, with deep focus on mobile development and shipping production-grade SDKs.
• A 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.
• A 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.
• Comfort making long-term architectural decisions while remaining pragmatic and adaptable.
• B.Sc. in Computer Science or Engineering, or equivalent practical experience.
• Remote work in a distributed team, with 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 such as secure hardware, MPC, and low-level crypto.
• Prior experience owning or founding a mobile platform or SDK from scratch.

What we offer

• Base salary range of $177,000 to $230,000 (for employees hired to work from the NYC headquarters; this range is specific to New York City).
• Target bonus, competitive equity grant, and generous benefits as part of the total compensation package.
• Remote work in a distributed team.

About Fireblocks

Fireblocks provides the simplest and most secure way for companies to work with digital assets and is trusted by some of the largest financial institutions, banks, and Web3 companies worldwide, including BNY Mellon, BNP Paribas, ANZ Bank, and Revolut. Dynamic, Fireblocks' embedded wallet platform, combines institutional-grade security with consumer-grade experiences through developer-first SDKs.