Senior Mobile Engineer (SDK / Wallet Infrastructure)

Industry: Fintech / Blockchain / Digital Assets
Location: 100% Remote (Candidates must be based in Latam)

We’re partnering with a fast-growing company in the digital assets space that is building secure, developer-first infrastructure powering next-generation financial applications. Their platform enables businesses to integrate wallet and payment experiences directly into their products, making complex blockchain interactions simple and seamless.

This team is at the forefront of embedded wallet technology, working with leading fintech and crypto companies to enable secure, scalable, and user-friendly financial experiences. You’ll be joining a product-driven engineering team focused on building high-quality SDKs used by developers globally.

What you’ll do

• Design and build high-quality mobile SDKs that allow developers to integrate wallet functionality into their apps
• Own features end-to-end: from API design and architecture to implementation, testing, and release
• Develop secure components for sensitive operations such as authentication, signing, and transaction flows
• Ensure long-term maintainability, performance, and backward compatibility of SDKs
• Build sample apps and documentation to support developer adoption
• Collaborate with cross-functional teams to improve developer experience and resolve integration challenges
• Contribute to best practices around testing, CI/CD, observability, and code quality

What they’re looking for

• 5+ years of software engineering experience with strong focus on mobile development
• Hands-on experience with iOS (Swift) and/or Android (Kotlin)
• Experience building SDKs or shared libraries (API design, versioning, distribution, maintenance)
• Strong understanding of mobile architecture, testing, and release processes
• Experience working on security-sensitive applications (e.g., key management, encryption, financial systems)
• Ability to own projects end-to-end and make architectural decisions
• Comfortable working in a fast-paced, product-driven environment

Nice to have

• Experience with blockchain or wallet-related systems (e.g., signing, on-chain interactions)
• Experience with cross-platform architectures or shared core logic
• Knowledge of advanced security concepts (secure hardware, cryptography, MPC, etc.)
• Experience building developer platforms or SDKs from scratch

Why this role is interesting

• Work on cutting-edge infrastructure in the digital assets and fintech space
• Build products used by developers and companies worldwide
• High ownership and impact in a fast-growing environment
• Fully remote, globally distributed team