Software Engineer, Mobile, Web3

Seoulstart; Singapore; On-site; SGD 90,000 - 130,000; Full time

Job summary

Seoulstart in Singapore is seeking a mobile-focused engineer to build and maintain the core OKX mobile app used by millions of daily users. You will ship features across pro/retail trading, asset management, and wallet, collaborating with design and product to turn ideas into tangible features.

You will work with global teams to deliver solutions for international users and integrate AI tools as a core part of the engineering workflow, leveraging cross-platform frameworks like ReactNative or

Qualifications

• Experience in native iOS/Android or cross-platform frameworks like ReactNative.
• Fluent in at least one of Java, Objective-C, Swift, Kotlin, or JavaScript.
• Understanding of common data structures and algorithms.
• Experience with agile development including TDD, CI, and Scrum.
• Builds AI-leveraged engineering workflows with tools like Claude Code or Codex.

Responsibilities

• Build and maintain core OKX mobile app used by millions of daily users
• Ship new features across pro/retail trading, asset management, and wallet
• Work cross-functionally with design and product to turn ideas into features
• Collaborate with global teams to deliver solutions for international users
• Use AI tools as a core part of the engineering workflow

Skills

Mobile development

Java/JavaScript

Algorithms & data structures

Agile development

Tools

React Native

AI tool integration

Job description

What you'd do

• Build and maintain core OKX mobile app used by millions of daily users
• Ship new features across pro/retail trading, asset management, and wallet
• Work cross-functionally with design and product to turn ideas into features
• Collaborate with global teams to deliver solutions for international users
• Use AI tools as a core part of the engineering workflow

What they want

• Experience in native iOS/Android or cross-platform frameworks like ReactNative
• Fluent in at least one of Java, Objective-C, Swift, Kotlin, or JavaScript
• Understanding of common data structures and algorithms
• Experience with agile development including TDD, CI, and Scrum
• Builds AI-leveraged engineering workflows with tools like Claude Code or Codex

Nice to have

• Strong understanding of blockchain fundamentals including wallets and tokens
• Experience building production-grade Web3, DeFi, NFT, or GameFi applications
• Experience in native iOS/Android or cross-platform frameworks like ReactNative
• Fluent in at least one of Java, Objective-C, Swift, Kotlin, or JavaScript
• Understanding of common data structures and algorithms
• Experience with agile development including TDD, CI, and Scrum
• Builds AI-leveraged engineering workflows with tools like Claude Code or Codex