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As a Senior iOS Engineer at Babylist, you will enhance the iOS app that supports new families by building user-centered features, collaborating across teams, and optimizing app performance. You will apply AI to improve development speed, mentor peers, and drive architectural decisions.
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The Senior iOS Engineer will lead engineering decisions, actively ship production code for the Speechify iOS app, and participate in product discussions to enhance user experience.
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The role involves leading engineering decisions, actively shipping code, participating in product discussions, and maintaining app architecture for Speechify's iOS app.
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About Luma AI
Luma'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 In
As 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.
The base pay range for this role is $170,000 – $360,000 per year.
About LumaLuma’s mission is to build unified general intelligence that can generate, understand, and operate in the physical world.
We believe that multimodality is critical for intelligence. To go beyond language models and build more aware, capable and useful systems, the next step function change will come from vision. So, we are working on training and scaling up multimodal foundation models for systems that can see and understand, show and explain, and eventually interact with our world to effect change.
Luma AI San Francisco, California, USA Office
San Francisco, CA, United States
What you need to know about the San Francisco Tech Scene
San Francisco and the surrounding Bay Area attracts more startup funding than any other region in the world. Home to Stanford University and UC Berkeley, leading VC firms and several of the world’s most valuable companies, the Bay Area is the place to go for anyone looking to make it big in the tech industry. That said, San Francisco has a lot to offer beyond technology thanks to a thriving art and music scene, excellent food and a short drive to several of the country’s most beautiful recreational areas.
Key Facts About San Francisco Tech
- Number of Tech Workers: 365,500; 13.9% of overall workforce (2024 CompTIA survey)
- Major Tech Employers: Google, Apple, Salesforce, Meta
- Key Industries: Artificial intelligence, cloud computing, fintech, consumer technology, software
- Funding Landscape: $50.5 billion in venture capital funding in 2024 (Pitchbook)
- Notable Investors: Sequoia Capital, Andreessen Horowitz, Bessemer Venture Partners, Greylock Partners, Khosla Ventures, Kleiner Perkins
- Research Centers and Universities: Stanford University; University of California, Berkeley; University of San Francisco; Santa Clara University; Ames Research Center; Center for AI Safety; California Institute for Regenerative Medicine
