Mobile Engineer - SDKs (Contract - US, LATAM, Spain)

This position is posted by Jobgether on behalf of a partner company. We are currently looking for a Mobile Engineer - SDKs in US, LATAM, or Spain.

In this role, you will design, build, and maintain mobile SDKs that enable developers to integrate modern financial and Web3 applications seamlessly. You will work on core functionalities such as authentication, wallets, and payment systems, ensuring SDKs are reliable, scalable, and easy to use. Collaborating closely with cross-functional teams, you will translate business requirements into technical solutions while documenting architecture and design decisions clearly. You will own projects end-to-end, mentor other engineers, and contribute to building the foundation for programmable finance and agentic commerce applications. This position is fully remote but requires alignment with ET/EST business hours, offering the flexibility to work from anywhere within the supported regions.

Accountabilities:

• Design and architect mobile SDKs for iOS and Android platforms from the ground up.
• Develop core features including authentication, smart wallets, and payment systems.
• Collaborate with cross-functional teams to understand business requirements and deliver SDK solutions.
• Document architecture, design choices, and implementation details clearly and concisely.
• Own projects end-to-end, from initial concept to deployment and support.
• Mentor team members and contribute to growing the mobile engineering team.

• 5+ years of professional mobile software development experience in native iOS (Swift) and Android (Java/Kotlin).
• At least 1 year of experience specifically in mobile SDK development.
• Strong communication skills in written and spoken English.
• Bachelor’s degree in Computer Science or related field, or equivalent industry experience.
• Experience with blockchain or Web3 technologies is a plus, particularly in wallets or payment systems.
• Proven ability to deliver high-quality, maintainable code and work effectively in a team environment.
• Optional: Experience with React Native or Flutter.