Mobile Engineer (Web3)

TL;DR

Mobile Engineer (Web3): Designing and implementing high-quality native mobile SDKs for embedded wallet infrastructure with an accent on API ergonomics, performance, and security. Focus on building secure-by-default cryptographic components, managing cross-platform SDK architecture, and ensuring seamless integration for fintech and crypto applications.

Location: Remote (preference for candidates in the Americas time zone).

Salary: $177,000–$230,000 (NYC-based estimate).

Company

hirify.global is a leading digital asset infrastructure platform providing secure custody, transaction, and wallet technology for global financial institutions and Web3 companies.

What you will do

• Design and implement native mobile SDKs for embedded wallet functionality.
• Own SDK features end-to-end, from API design and architecture to release and documentation.
• Build secure components for cryptographic operations and blockchain interactions.
• Evolve SDK architecture to support long-term maintainability and cross-platform adoption.
• Create sample applications and integration guides for developers.
• Collaborate with developer relations to address customer integration challenges.

Requirements

• 5+ years of software engineering experience with a focus on mobile development and shipping production-grade SDKs.
• Strong hands-on experience with iOS (Swift) and Android (Kotlin).
• Experience with React Native or other cross-platform frameworks.
• Proven track record of building mobile SDKs, including API design, versioning, and packaging.
• Experience with blockchain-enabled mobile systems and security-sensitive software (cryptography, key management).
• B.Sc. in Computer Science or equivalent practical experience.

Nice to have

• Experience with Rust or WebAssembly (Wasm) for cross-platform SDKs.
• Knowledge of advanced mobile security primitives like MPC or secure hardware.
• Prior experience founding or owning a mobile platform from scratch.

Culture & Benefits

• Work in a fast-paced, distributed team environment.
• Opportunity to define infrastructure for the next generation of financial applications.
• Competitive compensation package including equity grants.
• Focus on technical excellence, operational best practices, and developer experience.