Binance - Client-Side Audio/Video Development Engineer (Android / iOS / Web)
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Requirements
• 3+ years of Android/iOS/Web (one or multiple platforms) R&D experience; experience with audio/video/live streaming/IM/conference products is preferred. • Familiar with audio/video fundamentals on your platform: • Android: AudioRecord/AudioTrack, AudioFocus, permissions & background restrictions, device compatibility. • iOS: AVAudioSession, audio routing/interruptions, ReplayKit/background strategies. • Web: WebRTC APIs, getUserMedia, RTCPeerConnection, browser compatibility & security policies. • Understanding of real-time audio/video principles and common issues: packet loss/jitter/latency, echo & howling, audio routing errors, permission issues, state machine errors leading to "mutual hearing failure," etc. • Strong engineering skills: modular design, testability, stability governance (Crash/ANR), performance profiling and optimization. • Ability to understand and utilize core callbacks and diagnostic information from RTC SDKs; capable of online issue localization (building evidence chains using QoS metrics and logs). • In-depth experience with WebRTC (e.g., having read/modified parts of the source code, performed custom builds). • Experience adapting to complex network environments: overseas networks, weak network strategies, UDP restrictions, NAT traversal related to enterprise/campus networks (knowledge of ICE/STUN significantly enhances troubleshooting efficiency). • Specialization in audio: 3A (AEC/NS/AGC), audio mixing/voice changing/spatial audio, on-device noise reduction, or AI enhancement. • Client-side low-level capabilities: C++ core libraries, JNI/NDK, Metal/OpenGL, hardware encoder/decoder tuning, optimization for low-end devices. • Experience supporting large-scale events: pre-event rehearsals, gradual rollouts (gray releases), feature toggles, emergency strategies, and rapid rollback plans. • Experience developing real-time live streaming filters.
Responsibilities
• Develop and implement audio/video features for Android applications using native development kits such as Java/Kotlin with SurfaceView/TextureView APIs. • Design and develop user interfaces that are intuitive to navigate while ensuring a seamless integration of multimedia content within the application's design language, adhering to Material Design principles or other specified guidelines. • Optimize audio playback performance by implementing efficient media player controls for various file formats (e.g., MP3, WAV) and handling user interactions such as seeking, pausing, playing/stopping, volume control within the application context. • Create responsive web components that deliver high-quality video streaming experiences across different devices using HTML5 APIs like Media Elements or Web Audio API for audio processing tasks while ensuring compatibility with various browsers and screen sizes. • Collaborate closely with designers to ensure multimedia content aligns aesthetically within the application's visual theme, maintaining brand consistency throughout user interactions involving video/audio playback functionalities. • Conduct thorough testing of audio/video features across multiple devices (Android phones and tablets) using emulators or physical hardware in various operating systems to ensure compatibility with different screen sizes, resolutions, aspect ratios, input methods, network conditions, etc., while identifying potential bugs related to multimedia content. • Document the development process of audio/video features by creating comprehensive guides and technical documentation that detail implementation strategies for future reference or handovers within a team setting.
Benefits
• Shape the future with the world’s leading blockchain ecosystem • Collaborate with world-class talent in a user-centric global organization with a flat structure • Tackle unique, fast-paced projects with autonomy in an innovative environment • Thrive in a results-driven workplace with opportunities for career growth and continuous learning • Competitive salary and company benefits • Work-from-home arrangement (the arrangement may vary depending on the work nature of the business team)
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