OKX - Software / Senior Software Engineer, Mobile

• Design, build, test, and maintain reliable mobile growth features and supporting systems. • Contribute across the full engineering lifecycle, from understanding business and user problems to implementation, launch, monitoring, and iteration. • Develop and optimise growth capabilities such as onboarding funnels, referral programmes, acquisition journeys, engagement mechanics, notifications, and experimentation frameworks. • Work closely with Product Managers, Business Development, data teams, and regional stakeholders to translate growth objectives into practical engineering solutions. • Instrument user journeys and analyse relevant metrics to identify friction points and improvement opportunities. • Participate in technical discussions, evaluate trade-offs, and contribute proposals based on engineering principles, user impact, and data. • Use AI-assisted development tools to improve productivity, code quality, testing, and problem-solving. • Write clean, maintainable, and well-tested code while contributing to code reviews and engineering best practices. • For senior-level hires, independently lead projects, guide technical decisions, and support the development of other engineers. • What We Look For In You • At least 3 years of software engineering experience, with greater depth and independent project ownership expected at the Senior Software Engineer level. • Hands-on experience developing production mobile applications using iOS technologies such as Swift or Objective-C, or Android technologies such as Kotlin or Java. • Strong software engineering fundamentals, including data structures, algorithms, system design, testing, debugging, and performance optimisation. • Experience building consumer-facing products, with an understanding of how engineering decisions affect user experience and business outcomes. • Product and data instincts: you are comfortable thinking in terms of user journeys, funnels, conversion, retention, and measurable impact. • Ability to take ownership of engineering tasks and work effectively with product and business stakeholders. • A proactive and solution-oriented mindset: you identify problems, form a point of view, and propose practical ways forward. • Experience using AI coding tools as part of your development workflow, together with the judgment to review, test, and validate AI-generated outputs. • Strong communication and collaboration skills in a fast-moving, cross-functional environment. • Nice-To-Haves • Nice-To-Haves • Mobile development experience in iOS (Swift/Objective-C) or Android (Kotlin/Java) — or backend experience building growth systems that serve mobile apps directly (e.g. growth APIs, attribution pipelines, notification infrastructure). • Depth in mobile attribution and MMPs (AppsFlyer, Adjust, SKAdNetwork). • ASO operational experience (App Store Connect, Google Play Console). • Experience building referral systems, k-factor mechanics, or anti-fraud layers. • Background in fintech, crypto, or regulated consumer financial products. • Experience operating across US, EEA, and APAC markets. • A/B experiment framework ownership at meaningful scale.