Senior Staff Software Engineer, Mobile

As a Senior Staff Software Engineer on OKX's Mobile Growth team, you own the full engineering lifecycle of growth initiatives that move real metrics for millions of users. You sit upstream of requirements, shaping initiatives alongside product and business stakeholders, bringing engineering rigour to mobile growth bets. This is not a feature delivery role; you combine solid engineering foundations with hands-on growth experience and the conviction to bring proposals, not just execute them.

What you'll do

• Own the full engineering lifecycle of mobile growth initiatives from shaping the brief with product and business through to production launch and iteration.
• Build and optimise growth systems including funnel instrumentation, referral mechanics, acquisition loops, and experiment frameworks directly serving the mobile user base.
• Collaborate closely with Product Managers, Business Development, and local market teams across multiple regions to translate commercial goals into concrete, data-backed engineering proposals.
• Apply AI coding tools actively in your workflow to accelerate development, improve code quality, and bridge across tech stacks where needed.
• Drive technical decision-making on growth infrastructure, articulating trade-offs clearly and defending or revising your positions based on evidence.
• Mentor engineers on the team and help establish a culture where engineers bring solutions, not just responses.

What you bring

• 8+ years of software engineering experience with a track record of shipping production-quality systems at scale.
• Hands-on growth engineering experience in funnel optimisation, experiment frameworks, acquisition or referral systems within a consumer-facing product context.
• Understanding of mobile user behaviour, what drives retention and conversion, and how mobile-native growth mechanics differ from web.
• Active use of AI tools as a core part of your engineering workflow for building repeatable workflows and bridging across stacks, not just code generation.
• A proposal-driven mindset: you come to the table with a point of view, push back when you disagree, and bring data and counter-proposals rather than just flagging concerns.
• Strong cross-functional communication with comfort working with Product Managers, Business Development, and local markets to align on goals while holding the line on engineering quality.
• Data instincts: you think in funnels, know how to instrument what matters, and use metrics to drive decisions.

Nice to have

• Mobile development experience in iOS (Swift/Objective-C) or Android (Kotlin/Java), or backend experience building growth systems that serve mobile apps directly such as growth APIs, attribution pipelines, or notification infrastructure.
• Experience with Rust or other systems languages, especially if you have recently migrated from mobile-native stacks and are building fluency in backend tooling.
• Depth in mobile attribution and MMPs such as AppsFlyer, Adjust, or SKAdNetwork.
• ASO operational experience with App Store Connect or 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.

What we offer

• Competitive total compensation package
• Learning and development programs and education subsidy for your growth and development
• Various team building programs and company events
• Wellness and meal allowances
• Comprehensive healthcare schemes for you and your dependants

About OKX

OKX is a leading crypto exchange and developer of OKX Wallet, giving millions access to crypto trading and decentralized applications. OKX is trusted by hundreds of large institutions seeking access to crypto markets, backed by Proof of Reserves. Part of OKG, a group bringing blockchain value globally through products including OKX Wallet and OKLink, OKX is united by core principles of We Before Me, Do the Right Thing, and Get Things Done.