Apple Platform Engineer – AI‑Powered Inking

About the role

FluxInk is creating the next‑generation AI‑driven productivity and inking experience for macOS and iOS. We are seeking an Apple Platform Engineer who is passionate about handwriting, creative tools, and high‑performance on‑device machine learning to rebuild our Windows experience using native Apple technologies.

Key responsibilities

• Develop new features for macOS/iOS applications using Swift, SwiftUI, UIKit/AppKit, and integrate core C++ SDKs via Objective‑C++ wrappers.
• Maintain and refactor legacy Objective‑C and Swift codebases, ensuring stability and performance.
• Implement a custom GPU‑accelerated rendering engine with Metal (or WebGPU) and deeply integrate PencilKit for precise ink handling.
• Build a native Markdown editor with AI assistance, and design robust local storage and iCloud Drive sync using SQLite or CoreData.
• Collaborate with engine, backend, and AI teams to deliver feature parity with Android while providing a native‑first experience.
• Create internal profiling and debugging tools for rendering loops, ink pipelines, and AI behavior.

Required profile

• 4+ years of professional experience developing Swift/SwiftUI applications.
• Strong background in graphics programming, custom drawing engines, or GPU‑accelerated rendering.
• Proven ability to work with mixed‑language codebases (Swift, Objective‑C, C++).
• Experience delivering high‑performance, low‑latency mobile experiences.

Required skills

• Swift, SwiftUI, UIKit/AppKit
• Objective‑C, Objective‑C++
• C++ SDK integration
• Metal (or WebGPU)
• PencilKit
• CoreML
• SQLite / CoreData
• iCloud Drive integration
• iOS Keychain
• Webview technologies, Capacitor, JavaScript