Mobile Networking Engineer

🚀 About FlipsterFlipster(flipster.io) is a high-performance crypto perpetuals trading platform on a mission to create the most efficient, frictionless, and high-performance trading experience.Engineered by traders and optimized for trading, Flipster combines zero spreads, instant execution, and capital efficiency to deliver a platform where performance is the product.Operating globally and serving users in nearly 200 countries, Flipster is built for crypto traders who demand the ultimate perpetual trading experience — from active retail users to degens to seasoned pros — while maintaining the highest standards of compliance and security.
About this role

We're hiring a mobile networking specialist based in mainland China to own the SDK-level connectivity layer for our iOS and Android apps in the region. This is an engineering role focused on transport-layer logic, connection management, and client-side resilience strategies for users in challenging network environments.

Required experience

• 4+ years of mobile SDK development on iOS or Android (both preferred) with significant time spent on the networking layer
• Direct hands-on experience shipping apps to mainland China users with measurable reliability improvements you can describe
• Strong understanding of TLS, TCP behavior, and modern transport protocols (HTTP/2, HTTP/3, QUIC, WebSocket)
• Comfortable with Wireshark, tcpdump, Charles, and platform-specific network debugging tools
• Based in mainland China and able to test directly against real regional network conditions

Preferred

• Experience at fintech, exchange, streaming, or gaming companies with mainland China users
• Familiarity with native networking stacks (NSURLSession, OkHttp, Cronet) and how to customize them
• Background in protocol design or transport-layer optimization

Hiring process

• CV/Resume submission
• 1st round interview
• 2nd round interview

• What you'll have access to

  A real, hard, well-resourced problem. A team that respects deep network expertise. Autonomy on architecture and protocol decisions. Direct impact on user experience for our entire mainland China user base.