[Hiring] Senior iOS Engineer @Yonder Media Mobile

Role Description

Yo is building an AI inference platform that runs directly on smartphones - turning the phone in your pocket into part of a global AI network. You will own the iOS side: building the runtime that uses Apple Neural Engine to run real AI models on real devices while the phone sits on the charger. This is a foundational hire. You set the iOS technical direction from day one and ship code that runs on millions of devices.

Key Responsibilities

• Own the iOS SDK end-to-end - architecture, public API, distribution, versioning
• Build and maintain the iOS runtime that runs AI inference on Apple Neural Engine
• Make it fast, battery-friendly, and thermally well-behaved at sustained load
• Manage the iOS lifecycle correctly within Apple's background-execution rules
• Work with the Android engineer to keep the two platforms feature-aligned
• Ship to production and iterate against real-world telemetry

Qualifications

• 6+ years iOS engineering experience
• Strong Swift; comfortable with C++ and Objective-C interop
• Deep understanding of iOS lifecycle, background execution, and App Store review
• Experience with system-level constraints: battery, thermal, memory pressure
• Has shipped production code that runs across a wide hardware range

Nice to Have

• On-device ML experience (CoreML, MLX, ExecuTorch, llama.cpp on iOS)
• Apple Neural Engine optimisation; quantised model formats (INT4 / INT8, GGUF)
• Has shipped a public SDK or library used by other developers
• Cryptography fundamentals - end-to-end encryption, attestation, secure enclave
• Open-source contributions to ML inference projects

What Success Looks Like (First 6 Months)

• Working iOS SDK shipped to a pilot user base
• Production telemetry showing measured battery and thermal impact
• Stable runtime across the range of supported devices
• Clean foundation for the team to build on

Location & Logistics

• Remote / flexible (team in EU and US time zones)
• Competitive senior compensation, equity participation
• Reports to the CTO