Ready to shape how fans in Japan discover, read, and obsess over their next favorite manga? Join our JP Manga team in our Tokyo office, where we build the digital experiences that connect manga lovers with the content they love across mobile and web.
We're investing heavily in the reading experience for the next generation of manga readers, and mobile is at the center of it. That means building rich, engagement-driven, customer-facing software (discovery, reading, personalization, and more) with the craft and performance bar of an app customers open every day. We're early and moving fast. As a key member of the team, you'll build the experiences that connect manga lovers with their next obsession.
We're looking for a mobile-focused developer with strong native craft, in iOS (Swift) and/or Android (Kotlin), or React Native with solid native fundamentals, who brings a genuine passion for delightful user experiences, and gets energized seeing their work reach customers.
At Amazon, you'll work alongside the latest AI and GenAI tools that are increasingly woven into how teams operate: from AI-powered capabilities that accelerate decision-making, to Generative AI that helps you focus on work that truly matters. You'll have opportunities and resources to develop AI fluency at your own pace, with continuous learning built into the culture.
Key job responsibilities
As an SDE on our team, you will:
- Design, build, and ship customer-facing features for our mobile app, including discovery surfaces, the personal library, search and browse, and the reading experience.
- Write high-quality, well-tested code with performance, reliability, and maintainability in mind, especially for experiences customers open every day.
- Use AI-powered development tools effectively across your day-to-day work, including code generation, test authoring, review, debugging, and documentation. We build with modern AI-assisted tooling.
- Contribute to the evolution of the app's architecture, identifying friction points and proposing improvements.
- Partner with backend engineers to integrate with our services and data flows.
- Collaborate with cross-functional, geographically diverse teams (PM, UX, backend, and partner tech teams) through design, delivery, and support.
- Help maintain operational excellence: resolving issues, fixing bugs, improving observability, and keeping CI/CD healthy.
A day in the life
In this role you will:
- Write and test production Swift and/or Kotlin for features that manga fans across Japan use every day.
- Build customer-facing UI with modern frameworks (SwiftUI/UIKit, Jetpack Compose, or React Native) and make it feel fast and intuitive alongside UX.
- Wire your features to backend services and reading data, handling loading, empty, and offline states with care.
- Use AI-assisted tools to move faster on coding, tests, review, and debugging.
- Take part in design and code reviews, sharpening your craft with experienced mobile engineers.
- Help keep things healthy: fix bugs, improve observability, and keep CI green on the surfaces you work on.
About the team
Our team, located in Tokyo, is building the next-generation manga experience for Japanese customers. We own key pillars of JP Manga, including the surfaces where customers discover, read, and engage with manga across mobile and web. We balance new-product development with responsible stewardship of production systems that serve readers today, and we work backwards from customers to build a reading experience people open out of habit.- 3+ years of non-internship professional software development experience
- 2+ years of non-internship design or architecture (design patterns, reliability and scaling) of new and existing systems experience
- Experience programming with at least one software programming language
- Hands-on experience with modern mobile UI frameworks (SwiftUI/UIKit, Jetpack Compose, or React Native) and modern concurrency patterns (Swift Concurrency, Combine, Coroutines, async JS)
- Solid understanding of mobile fundamentals: app lifecycle, memory and performance, networking, persistence, and testing
- 3+ years of professional experience building mobile applications: native iOS (Swift/Objective-C) or Android (Kotlin/Java) using modern tooling and architectural patterns, or production React Native (or comparable cross-platform) experience with working knowledge of the underlying native platforms
- Experience writing and maintaining unit and UI tests, and working within a CI/CD pipeline- 3+ years of full software development life cycle, including coding standards, code reviews, source control management, build processes, testing, and operations experience
- Bachelor's degree in computer science or equivalent
- Hands-on experience using AI-assisted development tooling (coding assistants, agentic coding workflows) in real production work
- Experience integrating web content (WebView) or REST/real-time/push-based services in a native app
- Performance profiling and optimization experience on mobile devices
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