2 months ago
Hong Kong, Hong KongSenior / Staff+
Responsibilities
- Build a unified multi-platform messaging SDK with shared logic across mobile platforms.
- Platformize the in-house IM engine for community chat, payments, VIP service, and other product scenarios.
- Develop user-to-agent AI chat experiences, including real-time delivery and agent interaction flows.
- Own WebSocket long connections and offline push delivery across overseas and China vendor channels.
- Optimize latency, reliability, battery usage, memory, concurrency, and weak-network performance in production.
- Create AI-native engineering workflows and harnesses involving agents, evaluations, guardrails, and CI integration.
- Provide design and code reviews, mentor engineers, and raise the technical standard of the team.
- At Staff level, set technical direction and drive cross-team decisions for the IM platform.
Requirements
- Deep hands-on experience building native iOS and/or Android applications.
- Experience with cross-platform or shared business-logic approaches; Rust with UniFFI is used internally, while KMP, Flutter, and React Native experience is valued.
- Fluency in at least one of Swift, Kotlin, Rust, Objective-C, Java, or JavaScript, together with strong computer science fundamentals.
- Experience architecting and delivering large-scale mobile applications from requirements through production.
- Depth in chat or feature-level UX, real-time networking internals, WebSocket or long-connection systems, and/or offline push delivery using APNs, FCM, or China vendor push.
- Strong mobile performance experience covering memory, battery, concurrency, and weak-network conditions.
- Hands-on experience applying AI engineering workflows, with knowledge of LLM fundamentals, prompt engineering, RAG, and agent concepts.
- Ability to debug issues under real production load and operate effectively amid ambiguity.
- Demonstrated mentorship, technical ownership, and ability to raise team standards.
- Experience building or maintaining an IM/chat product or an SDK consumed by other teams is preferred.
- Experience with mini-program or dynamic/hot-update frameworks is preferred.
- Crypto trading or Web3 experience is preferred.
Benefits
- Competitive total compensation package.
- Learning and development programs and an education subsidy.
- Team-building programs and company events.
- Wellness and meal allowances.
- Comprehensive healthcare schemes for employees and dependants.
- The role is based in Hong Kong, and applicants with current Hong Kong work authorization who do not require visa sponsorship are prioritized.
Tech Stack
Categories
Mobile
About OKX
OKX builds a global cryptocurrency exchange and Web3 wallet used by retail and institutional traders for spot, derivatives, and DeFi access, with developer APIs. Its business model centers on trading and financing fees, plus wallet and on-chain services. Founded in 2017 and privately held, OKX publishes monthly proof-of-reserves and operates as part of the OKG group serving crypto markets worldwide.