Android Wallet Engineer — NFC, APIs & Payments

United States Digital Space LLC; Singapore; On-site; SGD 90,000 - 130,000; Full time

Job summary

United States Digital Space LLC in Singapore is seeking a software engineer with experience across full-stack and mobile platforms. You will contribute to the Wallet team, design APIs, and collaborate with cross-functional partners to deliver secure, scalable Android applications.

The role emphasizes hands-on development with Java/Kotlin backends, Android Jetpack Compose, and integration with NFC/SE hardware, while engaging external partners and internal teams to push payments and digital

Qualifications

• Bachelor's degree or equivalent practical experience.
• 2 years of experience with software development in one or more programming languages, or 1 year of experience with an advanced degree.
• 2 years of experience with full stack development, across back-end such as Java or Kotlin codebases.

Responsibilities

• Build and scale digital transit card solutions for various cities and transit agencies, supporting both Host Card Emulation (HCE) and Secure Element (SE)-based systems.
• Collaborate with Android platform teams to design and implement new APIs and capabilities that enhance Wallet functionality and security.
• Work with Product Managers, UX Designers, Technical Program Managers, Business Development, Legal, and other engineering teams within Wallet and across the company.
• Engage with external partners to define requirements, troubleshoot issues, and launch new integrations.
• Develop software that interfaces with device hardware like NFC controllers and Secure Elements.

Skills

Software development

Full stack development

Backend development (Java/Kotlin)

Education

Bachelor's degree or equivalent

Tools

Android Jetpack Compose

API design

External partner collaboration

NFC hardware integration

Job description

United States Digital Space LLC in Singapore is seeking a software engineer with experience across full-stack and mobile platforms. You will contribute to the Wallet team, design APIs, and collaborate with cross-functional partners to deliver secure, scalable Android applications.

The role emphasizes hands-on development with Java/Kotlin backends, Android Jetpack Compose, and integration with NFC/SE hardware, while engaging external partners and internal teams to push payments and digital