Jobs / Software Engineer, React Native - US App
Jobs at Mercari

Software Engineer, React Native - US App

Mercari Tokyo | Remote
EN: business
JP: none
Employment Type
Full time


Team’s Mission / Work Responsibilities

  • Build user-facing features for our mobile app using technologies like React Native, TypeScript, and Redux
  • Diagnose and fix bugs and performance bottlenecks to achieve native-grade performance
  • Design and maintain CI pipelines to build, test, and deliver our apps
  • Maintain code and write automation testing 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

 Unique and Bold Challenges

  • Deliver product features in a fast-paced start-up style environment
  • Seek to gain a deep understanding of the US market to ensure Mercari’s continued global success
  • Work effectively in a multicultural environment with colleagues from various backgrounds


Required Qualifications

  • 5+ years of software engineering experience 
  • Ability to write clean, testable, and fully typed TypeScript code
  • Ability to write and maintain technical documentation
  • Work experience developing and shipping user-facing features on mobile applications using React Native, Kotlin, or Swift
  • Knowledge of REST APIs
  • Experience setting up and maintaining CI pipelines
  • Experience monitoring and managing apps in production

Preferred Qualifications

  • You are up-to-date with React Native best practices
  • Work experience as a mobile app engineer in consumer, e-commerce, or marketplace space
  • Familiarity with native Android and iOS APIs
  • Familiarity with Sentry or Crashlytics
  • Familiarity with Github Actions

Screening Criteria

  • We will be looking for a shared belief in Mercari’s mission and values.
  • Please provide your resume in English.
  • We will conduct interviews in English,
  • Hiring Process Overview (subject to change)
    • 1. Doc Screening
    • 2. Skill Test
    • 3. Interviews (3-4 rounds. There are some cases you will meet a few members in 1 round)
    • 4. Background check
    • 5. Offer
    • 6. Hire

See this page for details.

Language Requirements

  • Either of the following is required:
    • English: Proficient (CEFR - C1) 
    • Japanese: Basic (CEFR - A2) optional

Click here for more information about CEFR.

About the Company

Our Mission

Mercari is a Japan-based company with the mission of “creating value in a global marketplace where anyone can buy & sell.” Having continuously worked toward this goal since our founding in 2013, we are now transforming from a startup into a global player. While this transformation brings its own specific set of challenges, we believe that solving them one after another will allow us to fully achieve our mission. Are you interested in working together to take on these exciting challenges?

Our Culture

Mercari’s culture has been central to the company since our founding, with the three core values of Go Bold, All for One, and Be a Pro. In addition, the “Trust & Openness” value was introduced to embody our culture of mutual trust, where information remains transparent and rules are kept to a minimum. Regardless of how big Mercari gets, our culture is essential to achieving our mission and will be promoted throughout our organization.

Working Conditions

Employment Status


  • Probationary period: First 3 months after joining the company. (During this period your contract conditions will be the same as that of a permanent employee.)



  • Smoking is prohibited within our offices
  • Mercari has introduced a work style policy called “Your Choice.” Each member is free to choose whether they want to work in the office or work fully remote. *Exceptions made for certain kinds of work.

Work Hours

  • Full flextime (no “core time” or “flex time”)
    *Does not apply to all positions


  • Two days off per week (as well as national holidays, New Year's break, etc.)
  • Paid leave, congratulatory and bereavement leave, relax days, sick leave


  • Annual salary paid in 12 monthly installments (including fixed overtime allowance)
  • Based on skills, experience, and abilities
  • Reviewed twice a year


  • Complete health and social insurance
  • Incentive program
  • Support systems, including those that benefit the employee’s family members
    *See this page for details.