Android Software Engineer — Wallet & Payments API

United States Digital Space LLC; Singapore; On-site; SGD 80,000 - 140,000; Full time

Job summary

United States Digital Space LLC in Singapore is seeking software engineers to help design scalable wallet and payments features across multiple devices. You will contribute to full-stack development, integrate server-side APIs, and collaborate with product, design, legal, and external partners.

The role emphasizes versatility, leadership, and the ability to tackle problems across the full stack, including Android internals and Jetpack Compose.

Qualifications

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

Responsibilities

• Build digital transit card solutions for various cities and transit agencies, supporting HCE and 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

Java/Kotlin

API design

Jetpack Compose

Android development

External partnerships

Cross-functional teamwork

Education

Bachelor’s degree or equivalent practical experience

Tools

N/A

Job description

United States Digital Space LLC in Singapore is seeking software engineers to help design scalable wallet and payments features across multiple devices. You will contribute to full-stack development, integrate server-side APIs, and collaborate with product, design, legal, and external partners.

The role emphasizes versatility, leadership, and the ability to tackle problems across the full stack, including Android internals and Jetpack Compose.