Android Engineer - SDKs (Contract - Spain or US) jobs in United States
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Crossmint · 7 hours ago

Android Engineer - SDKs (Contract - Spain or US)

positionUnited States
timeContract
remoteRemote
senioritySenior Level
date5+ years exp

Crossmint is a developer platform that enables companies to utilize stablecoins and blockchains for modern financial applications. The Android SDK Engineer will be responsible for designing and building mobile SDKs, collaborating with teams, and mentoring fellow engineers.

BlockchainDeveloper ToolsFinancial ServicesFinTech
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H1B Sponsor Likelynote

Responsibilities

Designing and architecting mobile SDKs from the ground up
Building SDKs for core features such as authentication, smart wallets, and payments
Collaborating with cross-functional teams to understand the business needs and translate them into mobile SDK solutions
Documenting your architecture and design choices clearly and concisely
Owning your projects end to end: from initial concept through to deployment and support
Mentoring other team members as we grow the mobile engineering team

Qualification

Android developmentMobile SDK developmentJavaKotlinBlockchain technologiesReact NativeFlutterCommunicationTeam collaborationMentoring

Required

5+ years of experience in Android development
1+ year specifically in mobile SDK development (not just mobile app development) in Java or Kotlin
Excellent written and spoken English
Bachelor's degree in Computer Science or a related field, or equivalent knowledge and skills with industry experience
Expert knowledge in Java and/or Kotlin

Preferred

Experience with blockchain or Web3 technologies, particularly in relation to wallets or payment systems
Provable experience shipping high quality code
Experience working on a team and references to back it
React Native or Flutter experience

Company

Crossmint

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Crossmint is an all-in-one platform for enterprise-grade APIs for wallets, stablecoins, and agentic commerce
dateFounded in 2022
location
New York, New York, USA
people-size51-200 employees
web-link
https://crossmint.com

H1B Sponsorship

Crossmint 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 (2)

Funding

Current Stage
Growth Stage
Total Funding
$23.6M
Key Investors
Ribbit Capital
2025-09-25Series Unknown
2025-03-18Series Unknown· $23.6M

Leadership Team

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Alfonso Gómez-Jordana Mañas
Cofounder (Eng & Product), Assistant (to the) Regional Manager
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Alyssa R.
Growth & Partnerships
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Recent News

PR Newswire
Crossmint Secures MiCA Authorization, Expanding Global Digital Asset Infrastructure Across the EU
2026-01-16
Decrypt
Marshall Islands Test Crypto for Universal Basic Income as Cash and Banks Fall Short
2025-12-21
PR Newswire
Wirex and Crossmint Partner to Expand On-Chain Stablecoin Payment Infrastructure
2025-11-25
Company data provided by crunchbase