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Nicoll Curtin Logo Nicoll Curtin · IT - Software Development

Mobile Networking Engineer

China, Hong Kong · Job Posted May 30, 2026
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Job Description

My client is a leading Crypto Exchange firm, expanding its presence in APAC, and currently seeking a Network Specialist to be based in their Mainland China office. \Reporting to the Head of Engineering the successful candidate will own the SDK-level connectivity layer for the firm’s iOS and Android apps in the region, and be responsible for the following:

Job Responsibility

  • Focused on transport-layer logic, connection management, and client-side resilience strategies for users in challenging network environments
  • Full responsibility for the design, development and maintenance of the connection layer of the firm’s mobile SDKs, with a focus on resilience in the mainland China network environment
  • Execute and tune multi-endpoint, multi-protocol fallback logic — including domain rotation, IP fallback, and transport switching
  • Build client-side network health detection and solve the cold start / bootstrap problem
  • Design the SDK to emit useful telemetry while remaining resilient when the telemetry pipeline itself is unreachable
  • Liaise with backend and infrastructure teams on edge POP placement and transit selection
  • Reproduce and debug region-specific connectivity issues using on-device tooling and packet captures

Requirements

  • 5-8 years of mobile SDK development on iOS or Android (both preferred) with significant time spent on the networking layer and a background in protocol design or transport-layer optimization
  • Solid experience in Fintech, Exchange, Streaming, or Gaming companies, specifically working with mainland China end-users
  • Proven hands-on experience working on apps for mainland China users with demonstrable reliability improvements, and experience testing directly against real regional network conditions
  • In-depth understanding of TLS, TCP behaviour, and modern transport protocols (HTTP/2, HTTP/3, QUIC, WebSocket)
  • Experience with Wireshark, tcpdump, Charles, and platform-specific network debugging tools
  • Familiarity with native networking stacks (NSURLSession, OkHttp, Cronet) and how to customize them
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