Senior iOS SDK Engineer

About CloudX

About The Team

What you'll do

• Collaborate with the product team to design and implement core SDK features
• Build and maintain integrations with third-party ad networks (Meta, Google AdMob, etc.)
• Optimize SDK to be seamless in host apps: minimize startup impact, reduce binary size, manage resources efficiently, and handle errors gracefully without affecting app stability
• Engage directly with publishers to diagnose real-world issues and improve SDK usability, reliability, and integration experience

Who you are

• Proven experience building and maintaining production iOS apps or SDKs
• Strong proficiency in Objective-C (Swift experience a plus)
• Expert-level understanding of iOS concurrency (GCD, async/await, threading, memory management)
• Deep understanding of iOS internals: runloops, networking, background execution, app lifecycle
• Strong testing and debugging discipline
• A genuine builder: Someone who codes daily, sweats the details, and has shipped complex systems, not just talked about them. You get energy from solving hard engineering problems yourself.
• A clear, concise, communicator: You can take a messy problem and make it legible, explaining trade-offs to engineers, PMs, and execs without hand-waving.
• A startup operator with good instincts: You know when to ship fast, when to slow down, and how to navigate ambiguity without waiting for perfect specs or marching orders.
• An owner, not a passenger: You turn loosely defined problems into real solutions, care deeply about whether the product actually works, and use AI as a force multiplier, not a crutch.

• Experience building developer-facing SDKs or libraries, including documentation, versioning, and integration support
• Experience distributing SDKs via CocoaPods / Swift Package Manager / binary frameworks
• Cross-platform SDK experience with Flutter, React Native, or Unity development
• Mobile advertising experience: Understanding of ad mediation, waterfalls, etc.

Pay and Benefits