Android Wallet Engineer – Transit & Payments

United States Digital Space LLC; Singapore; On-site; SGD 70,000 - 110,000; Full time

Job summary

United States Digital Space LLC is seeking a software engineer for a full‑time role in Singapore. The team builds next‑gen payment and wallet solutions, handling large‑scale data and secure interactions with device hardware.

You will contribute to backend services using Java/Kotlin and develop Android applications, collaborating across cross‑functional groups to deliver robust features. Candidates should have a Bachelor’s degree and at least 1 year of full‑stack, Android, and algorithm

Qualifications

• Bachelor's degree or equivalent practical experience.
• 1 year of experience with full stack development, across back-end such as Java or Kotlin codebases.
• 1 year of experience with Android application development.
• 1 year of experience with data structures and algorithms.

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.
• Develop software that interfaces with device hardware like NFC controllers and secure elements.
• 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.

Skills

Java/Kotlin

Android development

Data structures & algorithms

Education

Bachelor's degree

Job description

United States Digital Space LLC is seeking a software engineer for a full‑time role in Singapore. The team builds next‑gen payment and wallet solutions, handling large‑scale data and secure interactions with device hardware.

You will contribute to backend services using Java/Kotlin and develop Android applications, collaborating across cross‑functional groups to deliver robust features. Candidates should have a Bachelor’s degree and at least 1 year of full‑stack, Android, and algorithm