Software Engineer - iOS

About Luma AILuma's mission is to build multimodal AI to expand human imagination and capabilities. We believe multimodality is critical for intelligence. We are working on training and scaling up foundation models for systems that can see, understand, show, and explain, and eventually interact with our world. Our Dream Machine app is at the forefront of this vision, bringing powerful AI to millions of users in a delightful mobile experience.Where You Come InAs an iOS Engineer, you will architect and build the next generation of the Dream Machine app, transforming it into a fast, responsive, and magical creative companion. This is a foundational role with significant ownership. You will work from the ground up, collaborating closely with our product, design, and research teams to reimagine what a generative video product feels like in your pocket. You are driven by a product mindset, and you care deeply about how things feel, not just if they work.What You'll Do

• Architect from the Ground Up: Lead the design and development of core architectural components for the Dream Machine app, using Swift, SwiftUI, and UIKit.
• Ship Polished Experiences: Collaborate with designers and researchers to translate a powerful product vision into elegant, intuitive, and user-focused mobile experiences.
• Master Media Workflows: Build and optimize features for advanced video workflows, including real-time processing, playback, and editing, leveraging frameworks like AVFoundation.
• Tune for Peak Performance: Dive deep into performance, memory management, and power optimization to ensure a fluid experience, especially when handling complex media and on-device AI.
• Elevate the Team: Mentor other engineers, drive technical strategy, and establish best practices for mobile engineering at Luma.

Who You Are

• 5+ years of experience building and shipping high-quality iOS applications, with strong proficiency in Swift, SwiftUI, and UIKit.
• A proven track record of shipping polished, consumer-facing apps that have scaled to real users.
• Deep understanding of iOS architectural patterns and ability to optimize performance, memory, and power.
• A strong product and design sensibility; you have experience influencing UX decisions and partnering closely with designers to achieve a high bar for quality.
• You are a strong communicator and thrive in a collaborative, fast-paced environment where you can take ownership.

What Sets You Apart (Bonus Points)

• Deep experience with AVFoundation, Metal, or other frameworks for video processing, camera workflows, or real-time media.
• A background in building creative, media-rich, or camera-based applications (e.g., video editors, design tools).
• Familiarity with integrating on-device ML models using CoreML or similar frameworks.