Senior iOS Engineer

Tokyo
Remote OK - Anywhere in Japan
Full-time
June 12, 2026

What you'll do

Own major surfaces of a consumer app used by millions, driving them from idea to release and beyond
Translate product hypotheses into polished, performant iOS experiences in Swift / SwiftUI, and set the quality bar for the team
Lead UI logic shared across platforms via Kotlin Multiplatform (KMM), collaborating closely with Android and Web frontend
Define how features are instrumented, run A/B experiments, and turn data into decisions on activation, retention, and engagement
Own user feedback and long term product success for your area, including the key metrics that define it
Mentor mobile engineers and raise the team's overall engineering and product judgment

Requirements

Deep iOS engineering skills with a track record of high-impact, user-facing features owned end to end
Strong in Swift and SwiftUI; confident with modern concurrency and scalable app architecture
Real product sense: you have opinions about UX and can tell good from "technically done"
User sympathy - you instinctively notice friction, jank, and confusing flows, and you advocate for the user in every tradeoff
Data-driven: you frame hypotheses, define metrics, and let dashboards and experiments guide iteration
Clear communicator who can align engineers, design, and leadership, and make tradeoffs explicit
Bias toward shipping and learning, while keeping reliability and UX from decaying under growth

Experience

5–8+ years building and iterating on mobile products used by real users
Experience of leading a small team (2–5 engineers) and/or driving a cross-functional team toward a product goal
Experience as a product owner and/or owning key product metrics, not just shipping assigned tickets
Proven track record shipping iOS features and improving them based on feedback or metrics
Professional experience with B2C / consumer-facing products, presumably in gaming, social, etc. realm
Hands-on experience with A/B testing or product experimentation
Kotlin / KMM experience is a plus (but not a requirement)

Education

Bachelor's degree or above. Shipped work, judgment, and product taste matter more than credentials.

Nice to have

Experience of a fast-growing consumer app, or your own indie app on the App Store
Interest in anime, otaku culture, creator communities, or AI image generation

Note: If you've read this, please tell us the names of your top 5 favorite niche anime at the end of your message.

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About Metanomaly

Metanomaly builds an AI-native image generation and sharing platform.

They are one of the largest AI image generation platforms by traffic and offer proprietary models that enable users to unleash their artistic potential and imagination when creating virtual characters.