Software Engineer, Mobile, Core

United States Digital Space LLC; Hong Kong; On-site; HKD 446,400 - 669,600; Full time

Benefits offered by this job

Competitive total compensation package

L&D programs and Education subsidy for employees

Job summary

United States Digital Space LLC is seeking a Mobile Software Engineer to build and maintain applications for millions of users. This role focuses on optimizing features and collaborating with design and product teams to enhance user experience.

The ideal candidate will have experience in mobile development, a passion for technology, and an understanding of AI principles and workflow management.

Join us in shaping a leading crypto platform, working in a vibrant and fast-paced environment.

Qualifications

• Experience in mobile app development for iOS or Android.
• Fluency in Java, Objective-C, Swift, Kotlin, or JavaScript.
• Understanding of data structures and algorithms.

Responsibilities

• Develop new features for the iOS and Android apps.
• Optimize app performance and enhance customer satisfaction.
• Collaborate with design and product teams to implement features.

Skills

iOS/Android development or cross-platform solutions

Java/Objective-C/Swift/Kotlin/JavaScript fluency

Understanding of data structures and algorithms

Agile development process including TDD, CI and Scrum

Job description

the company will be prioritising applicants who have a current right to work in Hong Kong, and do not require the company's sponsorship of a visa.

Who We Are

At the company, we believe that the future will be reshaped by crypto, and ultimately contribute to every individual's freedom.

the company is a leading crypto exchange, and the developer of the company Wallet, giving millions access to crypto trading and decentralized crypto applications (dApps). the company is also a trusted brand by hundreds of large institutions seeking access to crypto markets. We are safe and reliable, backed by our Proof of Reserves.

Across our multiple offices globally, we are united by our core principles: We Before Me, Do the Right Thing, and Get Things Done. These shared values drive our culture, shape our processes, and foster a friendly, rewarding, and diverse environment for every OK-er.

the company is part of OKG, a group that brings the value of Blockchain to users around the world, through our leading products the company, the company Wallet, OKLink and more.

About The Team

As a mobile software engineer, you will build and maintain a core the company app with millions of daily active users. You will work cross-functionally with design, product and other engineering teams to identify customer needs, and ship high-quality new features through fast iterations. This is an opportunity to learn the full life cycle of crypto mobile applications including pro/retail trading, asset management and wallet. Join us in building the next generation of mobile-first Web3 experiences, empowering millions of users to seamlessly interact with digital assets, decentralized applications, and blockchain-powered services through secure and intuitive products.

This role will help build the backbone of a global platform—from real-time messaging and account infrastructure to security and risk systems that serve and protect millions of users.

What You'll Be Doing

• Part of a global mobile team, developing new features for the all-in-one iOS and Android apps.
• Strive for performance optimization and maximize customer satisfaction.
• Stay on top of industry trends, and evaluate new solutions to address our unique and fast-growing business needs.
• Work closely with design and product teams, and turn design ideas into quality features that scale to millions of users.
• Collaborate with global development teams, and deliver customized solutions targeting international users while maintaining consistency with the overall architecture.
• Maintain high-quality technical documentation and improve efficiency in cross-office/timezone cooperation.
• Actively uses AI tools as a core part of your engineering workflow — not just for code generation, but for building repeatable workflows and bridging across stacks.

What We Look For In You

• Experience in either native iOS/Android development, or cross-platform solutions like ReactNative/Flutter/Lua.
• Fluent with at least one of the following languages: Java/Objective-C/Swift/Kotlin/JavaScript.
• Understanding of common data structures and algorithms.
• Embrace agile development process including TDD, CI and Scrum.
• Passionate about mobile technology and building applications for a large user base.
• Solid understanding of LLM fundamentals, Prompt Engineering, RAG, and core Agent concepts; proven practical experience delivering AI engineering solutions, including building complete AI workflows/pipelines from the ground up.

Nice-To-Haves

• Familiar with crypto trading / Web3 industry.
• Experience in leading a project team independently.

Perks & Benefits

• Competitive total compensation package
• L&D programs and Education subsidy for employees