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Senior Product Designer - Mercari Marketplace
Mercari, Inc. 🇯🇵 Minato, Tokyo, Japan
Own the end-to-end design for buyer-facing experiences, from problem framing through execution and launch. Act as Lead Designer for assigned product areas, setting experience direction and design quality standards.
Responsibilities
- Own the end-to-end design for buyer-facing experiences, from discovery and problem framing through execution and launch
- Act as Lead Designer for assigned product areas, setting experience direction and design quality standards
- Translate ambiguous business and user problems into clear experience strategies, flows, and high-quality UI
- Drive design decisions through strong craft, systems thinking, and user-centered rationale
- Collaborate deeply with PM, Eng, and UXR to shape product direction and influence roadmaps
- Identify gaps and opportunities beyond the immediate scope and proactively propose new ideas, concepts, or improvements
- Contribute to and evolve shared design systems, patterns, and best practices
- Provide thoughtful feedback and mentorship to other designers, raising the overall quality of work
Requirements
- 6+ years of experience in product, UX, or interaction design with ownership of end-to-end experiences
- Strong craft skills across UX, interaction design, and visual design, with a sharp eye for detail and quality
- Proven ability to lead design for complex or ambiguous problem spaces
- Experience influencing product direction through design thinking, concepts, and storytelling
- Solid understanding of design systems, scalable patterns, and consistency at scale
- Strong collaboration and communication skills with cross-functional partners
- A portfolio demonstrating high-quality shipped work, problem-solving depth, and design leadership
Key Skills
About Mercari, Inc.
Mercari is a C2C marketplace app allowing anyone with a smartphone to easily sell items they no longer need, providing a new and unique user experience. In the past, buying and selling secondhand items has commonly been done at physical shops. However, this came with issues: the travel time required to go to these shops, the limited selection of items these shops carry, the unclear prices for both the buyer and seller alike due to the involvement of dealers, and more. Online auction websites for buying and selling secondhand items came with their own problems, including difficult listing procedures and long bidding times. On Mercari, anyone can use their smartphone to easily buy and sell items. We also provide easy and inexpensive shipping options thanks to our partnerships with delivery companies and convenience stores. As our service is catered to individuals on both the buying and selling sides, anyone can experience the fun of easily selling unneeded items for money and the excit
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