Mercari is Your Marketplace. We make it super easy to sell (or buy) almost anything. We all have things we don’t use, never used or simply outgrew. But that stuff still has value. Mercari gives you the power to simply sell it, ship it, and earn some cash for it. Fashion to toys. Sporting goods to electronics. All the brands you know and love. Our mission is simple: to make selling easier than buying. And with 50M+ downloads in the U.S. and 350k+ new listings every day, we're just getting started.

As a Software Engineer, Mobile, you will be responsible for developing and maintaining our marketplace's React Native mobile application. In this senior role, you will be expected to work independently and with quality and speed. You will mentor other engineers and provide thoughtful code review.

You are skilled at breaking projects down into smaller tasks, you communicate clearly and are comfortable working asynchronously across geos. You believe in the value of team, building others up is in your DNA. This role will require you to work in a fast-paced, start-up style environment with colleagues from various backgrounds to deliver user-facing product features.

What you’ll be doing:

Develop and maintain our mobile app using technologies like React Native, TypeScript, and Redux
Diagnose and fix bugs/performance bottlenecks to achieve native-level user experience
Design and maintain CI/CD pipelines to build, test, and deliver our app
Maintain code and write automation tests to ensure the product is of the highest quality
Work collaboratively with cross-functional teams to solve key business problems
Introduce, socialize, and promote mobile development best practices among the team
Mentor other engineers and provide constructive feedback through code reviews

What you’ll need:

Bachelor's degree in Computer Science, Data Science, Engineering, or a related field (or equivalent experience)

5+ years of experience in React Native development, shipping apps that impact millions of users
Experience with React Native’s New Architecture and iOS Liquid Glass integration
Ability to write clean, testable, and fully typed TypeScript
Experience and proficiency using Redux
Experience with Native iOS and/or Android development
Solid foundations and familiarity with Xcode and Android Studio
Ability to write and maintain technical documentation
Knowledge of REST APIs
Experience setting up and maintaining CI/CD pipelines
Experience monitoring and managing apps in production

Bonus Points:

Experience with Over the Air Updates (OTA)
Experience using Sentry for error and performance monitoring
Experience using AI as part of development, including AI code assist, AI coding and agentic development

This position is based in the San Francisco Bay Area with an expectation of in-office 2-3 days per week.

The applicable salary range for this role is $144,000 to $216,000 for applicants located in the San Francisco Bay Area.

Why Mercari:

Small enough to make an impact, but established enough to provide the stability you need to be successful, Mercari is the best of both worlds. At Mercari you are encouraged to take risks. And when you do, you can do it confidently, knowing you have a team and a company that supports you.

As we grow, your career opportunities with Mercari grow. As our teams expand, your responsibilities expand. Our teams are supported with access to new tools, technologies, and learning opportunities. We will never stop growing.

Total Rewards:

Flexibility: Work from home and the office, depending on need and receive flexible time off
Wellbeing: Top-notch insurance plans, best-in-class new parent offerings and access to mind and body wellness apps
Growth: As we grow, your career opportunities grow, we provide access to new tools, technologies and learning opportunities
Comprehensive and total rewards: We provide a strong financial foundation and rewards that go beyond the paycheck
Teamwork: We are each other's biggest fans- we celebrate from virtual coffee breaks to recognition programs

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