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Senior Software Engineer - Japan

Whatnot· Engineering
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Hybrid (Tokyo, Japan)JPY 19000k - JPY 26000k + equityFull-timePosted 4d ago

About the role

Senior Engineer role focused on building Whatnot's product and technical presence in Japan. Ground-floor opportunity to own end-to-end features for the Japanese market, define technical strategy, and lay the foundation for future hires, while collaborating with a global engineering org.

Responsibilities

  • Design, build, and ship features critical to growing the Japan market such as payment/payout methods, logistics integrations, seller onboarding and compliance, and locally-tailored buyer and seller experiences
  • Own technical strategy for Japan: translate market needs into a roadmap, decide what to build and how, and own trade-offs, including how Japan-market work fits into Whatnot's global architecture
  • Lead execution across multiple workstreams, coordinating with engineers and cross-functional partners in Japan and globally
  • Lay the technical foundation for Whatnot's engineering presence in Japan, including architecture, patterns, quality, and culture for future hires

Qualifications

  • 8+ years of software engineering experience at high-growth technology companies
  • Experience as technical lead of a team or initiative without direct reports
  • Full-stack range: comfortable with backend and frontend and integrating systems end-to-end (Python, Elixir, JavaScript)
  • Experience with 0→1 work (small team, no playbook, direct line to outcomes)
  • Near-fluent Japanese and English (written and verbal)
  • Bonus: e-commerce, marketplace, or livestream products; Japan-specific integrations (logistics, payments, identity); localizing a global product for Japan

Skills

Required:Software engineeringTechnical leadership without direct reportsFull-stack developmentLanguages

Benefits

  • Generous Holiday and Time off Policy
  • Health Insurance options including Medical, Dental, Vision
  • Work From Home Support
  • Home office setup allowance
  • Monthly allowance for cell phone and internet
  • Care benefits
  • Monthly allowance for wellness
  • Annual allowance towards childcare
  • Lifetime benefit for family planning (adoption or fertility expenses)
  • Retirement; 401k offering in the US (employer match up to 4%) and Pension plans internationally
  • Monthly allowance to dogfood the app
  • Parental Leave (16 weeks paid + gradual return)
Last updated Oct 21, 2026. Interested? Apply on the company site.
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About Whatnot

Whatnot is the largest livestream shopping platform in the U.S.

Whatnot is the largest livestream shopping platform in the U.S., connecting buyers and sellers in real-time across any category – from collectibles like trading cards to comics, fashion, sneakers, and more.

marketplacee-commerce
Company profileWebsite

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