Senior Software Engineer, iOS – Mobile Enablement

Mercari, Inc.

Senior Software Engineer developing iOS features for Mercari's mobile platform. Collaborating with various teams to enhance user experiences and streamline workflows.

Posted 5/25/2026full-timeMinato City • 🇯🇵 JapanSeniorWebsite

Tech Stack

Tools & technologies

iOSSwift

About the role

Key responsibilities & impact

Design, implement, and maintain high-quality iOS features using Swift and modern iOS frameworks.
Own end-to-end feature development, from requirements definition through architecture, implementation, testing, and release.
Lead architectural design for complex features and system components, ensuring maintainability, scalability, and reliability.
Optimize app performance, startup time, memory usage, and stability across diverse devices and OS versions.
Work closely with machine learning, backend, infrastructure, product, and design teams to deliver seamless mobile experiences, as well as other feature-owner iOS engineering teams.
Contribute to and evolve Mercari's mobile platform, SDKs, and shared modules used across teams.
Drive high code quality through code reviews, automated testing, CI/CD improvements, and rigorous documentation.
Champion engineering best practices and contribute to guidelines and standards across Client Engineering.
Stay current with the latest developments in iOS, Swift, UIKit, SwiftUI, concurrency, and mobile architecture patterns.
Bring innovative ideas to improve user experience, developer experience, and operational efficiency.
Take ownership of initiatives that span multiple teams, driving alignment and technical decision-making.
Mentor junior and mid-level engineers, helping strengthen the overall technical capabilities of the team.

Requirements

What you’ll need

Shared belief in the mission and values of the Mercari Group.
Bachelor’s degree in Computer Science, Engineering, or equivalent practical experience.
Strong proficiency in Swift and iOS development frameworks (UIKit, SwiftUI, Combine, Foundation).
Solid understanding of mobile architecture patterns (MVC, MVVM, Clean Architecture, VIPER, etc.).
Demonstrated experience with large-scale mobile applications and complex codebases.
Experience integrating with backend APIs and asynchronous/concurrent programming.
Strong analytical and problem-solving skills; ability to navigate ambiguity.
Excellent communication skills and ability to explain technical concepts clearly.
Passion for building user-facing mobile products.
Experience with large-scale mobile apps serving millions of users.
Expertise in performance optimization, instrumentation, and mobile observability (e.g., crash analysis, metrics).
Experience with SwiftUI, concurrency (async/await), and modern iOS platform capabilities.
Contributions to open-source iOS projects or active involvement in the mobile community.
Experience driving technical initiatives across multiple teams or owning platform-level components.
Familiarity with CI/CD for mobile, automated testing frameworks, and release management.
UI/UX sensitivity and an eye for detail in crafting polished user experiences.

Benefits

Comp & perks

🌐 Worldwide ❌ Jobs You've Hidden ⭐️ Saved Jobs ✅ Applied Jobs ✉️ Email Alerts 👤 Account Mercari, Inc. Website LinkedIn All Job Openings 1001 - 5000 employees Founded 2013 🛍️ eCommerce 🏪 Marketplace 🌍 Social Impact eCommerce
Marketplace
Social Impact Mercari, Inc. is a marketplace platform that allows users to buy and sell various items, offering a convenient and efficient way for individuals to engage in commerce. The company emphasizes innovation, diversity, and inclusion in its work culture while striving to unleash the potential of its employees. With a commitment to sustainable practices, Mercari aims to create a positive impact within the communities it serves and beyond. Senior Software Engineer, iOS – Mobile Enablement 🔥 6 hours ago 🏢🏡 Minato City – Hybrid ⏰ Full Time 🟠 Senior 🧑‍💻 Full-stack Engineer 🗣️🇯🇵 Japanese Required iOS Swift Apply Now Find Hiring Managers Customize resume + cover letter Report problem ☆ Save ☑️ Mark as applied ❌ Hide 📋 Description
Design, implement, and maintain high-quality iOS features using Swift and modern iOS frameworks.
Own end-to-end feature development, from requirements definition through architecture, implementation, testing, and release.
Lead architectural design for complex features and system components, ensuring maintainability, scalability, and reliability.
Optimize app performance, startup time, memory usage, and stability across diverse devices and OS versions.
Work closely with machine learning, backend, infrastructure, product, and design teams to deliver seamless mobile experiences, as well as other feature-owner iOS engineering teams.
Contribute to and evolve Mercari's mobile platform, SDKs, and shared modules used across teams.
Drive high code quality through code reviews, automated testing, CI/CD improvements, and rigorous documentation.
Champion engineering best practices and contribute to guidelines and standards across Client Engineering.
Stay current with the latest developments in iOS, Swift, UIKit, SwiftUI, concurrency, and mobile architecture patterns.
Bring innovative ideas to improve user experience, developer experience, and operational efficiency.
Take ownership of initiatives that span multiple teams, driving alignment and technical decision-making.
Mentor junior and mid-level engineers, helping strengthen the overall technical capabilities of the team. 🎯 Requirements
Shared belief in the mission and values of the Mercari Group.
Bachelor’s degree in Computer Science, Engineering, or equivalent practical experience.
Strong proficiency in Swift and iOS development frameworks (UIKit, SwiftUI, Combine, Foundation).
Solid understanding of mobile architecture patterns (MVC, MVVM, Clean Architecture, VIPER, etc.).
Demonstrated experience with large-scale mobile applications and complex codebases.
Experience integrating with backend APIs and asynchronous/concurrent programming.
Strong analytical and problem-solving skills; ability to navigate ambiguity.
Excellent communication skills and ability to explain technical concepts clearly.
Passion for building user-facing mobile products.
Experience with large-scale mobile apps serving millions of users.
Expertise in performance optimization, instrumentation, and mobile observability (e.g., crash analysis, metrics).
Experience with SwiftUI, concurrency (async/await), and modern iOS platform capabilities.
Contributions to open-source iOS projects or active involvement in the mobile community.
Experience driving technical initiatives across multiple teams or owning platform-level components.
Familiarity with CI/CD for mobile, automated testing frameworks, and release management.
UI/UX sensitivity and an eye for detail in crafting polished user experiences. Apply Now 📊 Check your resume score for this job Improve your chances of getting an interview by checking your resume score before you apply. Check Resume Score 🌐 Worldwide Built by Lior Neu-ner. I'd love to hear your feedback — Get in touch via DM or support@remoterocketship.com Search Search Jobs by country Search jobs by city Search jobs by job title Search entry-level jobs Search junior-level jobs Search senior-level jobs Search jobs by tech stack Search jobs by contract type Search remote internships Search remote part-time jobs Remote jobs Anywhere in the World Companies Hiring Anywhere in the World Companies Hiring Sales People Anywhere in the World Companies Hiring Software Engineers Anywhere in the World Resources Advice Tips for finding remote jobs Interview questions and answers Resume examples Cover letter examples Post a job Affiliates Privacy policy Terms of service Job board SEO course AI Apply Copilot OpenClaw job finder Jobs by Country Remote jobs anywhere in the world (Worldwide remote jobs) Remote jobs United States Remote jobs Australia Remote jobs Brazil Remote jobs Canada Remote jobs France Remote jobs Ireland Remote jobs Germany Remote jobs Netherlands Remote jobs Spain Remote jobs UK Popular Jobs Remote data analyst jobs Remote customer support jobs Remote executive assistant jobs Remote marketing jobs Remote product designer jobs Remote product manager jobs Remote project manager jobs Remote recruiter jobs Remote sales jobs Remote software engineer jobs Jobs by Type Remote full-time jobs Remote part-time jobs Remote contract jobs Remote internship jobs Remote entry-level jobs Remote jobs with no experience required Remote junior jobs (1-3 years of experience) Digital nomad jobs Remote jobs with no degree required Freelance remote jobs Temporary remote jobs Remote jobs hiring now Stay at home mom jobs

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Hard Skills & Tools

SwiftiOS development frameworksUIKitSwiftUICombineFoundationmobile architecture patternsperformance optimizationasynchronous programmingautomated testing

Soft Skills

analytical skillsproblem-solving skillscommunication skillsmentoringownershipcollaborationinnovationattention to detailtechnical decision-makingnavigating ambiguity

Certifications

Bachelor’s degree in Computer ScienceBachelor’s degree in Engineering