Senior iOS Engineer - AI-Driven, Fast-Paced Startup

Sekai app; San Francisco, Northern (CA, KY); Hybrid; USD 180,000 - 260,000; Full time

Job summary

Sekai is building a fast, AI-native consumer platform with a focus on a polished iOS experience. We are looking for a Senior iOS Engineer to own the iOS app, move quickly in a startup environment, and leverage AI tools to accelerate development.

You will collaborate with Product, Design, Backend, and Mobile engineers to ship features and define our mobile development workflow, keeping pace with Apple platform updates and best practices.

Qualifications

• Strong professional experience building and shipping iOS apps.
• Deep familiarity with Swift, iOS SDK, and modern iOS development practices.
• Experience working on consumer mobile apps with high standards for UX, performance, and reliability.
• Experience owning projects end-to-end in a startup, 0-to-1 product environment, or similarly fast-moving team.
• AI-native mindset: you actively use AI tools to build faster, explore better implementation paths, and improve engineering productivity.
• Strong product sense and willingness to work closely with design and product teams.

Responsibilities

• Own and improve Sekai’s iOS app experience, quality, and release velocity.
• Build and ship consumer-facing iOS features with strong attention to speed, polish, and reliability.
• Bring modern iOS best practices and the latest Apple platform knowledge to the team.
• Work across native iOS, hybrid mobile, and web-based app experiences when needed.
• Partner closely with Product, Design, Backend, and Mobile engineers to move from idea to shipped product quickly.
• Use AI development tools to accelerate coding, debugging, refactoring, and product iteration.

Skills

iOS apps

Swift & iOS SDK

UX & performance

Startup / 0-to-1

AI-native mindset

Product collaboration

Job description

Sekai is building a fast, AI-native consumer platform with a focus on a polished iOS experience. We are looking for a Senior iOS Engineer to own the iOS app, move quickly in a startup environment, and leverage AI tools to accelerate development.

You will collaborate with Product, Design, Backend, and Mobile engineers to ship features and define our mobile development workflow, keeping pace with Apple platform updates and best practices.