Fireblocks · 1 day ago
Mobile Engineer
NYC Metro Area
Full-time
Hybrid
Senior Level
5+ years expFireblocks is a leading platform for digital assets, providing secure solutions for financial institutions and brands. The Mobile Engineer role focuses on designing and implementing high-quality native mobile SDKs for integrating embedded wallet functionality into applications, ensuring performance, reliability, and security.
BlockchainCryptocurrencyCyber Security
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
Qualification
Required
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
Preferred
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
Fireblocks
Fireblocks is a blockchain security service provider for moving, storing, and issuing digital assets.
501-1000 employees
H1B Sponsorship
Fireblocks has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (4)
2024 (1)
2023 (4)
2022 (3)
Funding
Current Stage
Late StageTotal Funding
$1.04BKey Investors
Paradigm
2024-06-01Secondary Market
2023-02-01Series Unknown
2021-12-01Series E· $550M
Leadership Team
Michael Shaulov
CEO, co-founder
Idan Ofrat
Chief Product Officer & Co-Founder
Recent News
Sourcery
2026-01-15
2026-01-13
Company data provided by crunchbase