This is a direct contract with Sollective K.K.

Please be aware that registration for the Japanese Invoice System (適格請求書発行事業者) is mandatory for participation.
　

Project Overview
As a fast-growing global logistics SaaS startup, Portrich is seeking a highly skilled UI/UX Designer to own the complete redesign of its core platform. This mission is critical: the role is fundamental to our aggressive push into the U.S. market, starting with the Q2 2026 launch.
　

The successful candidate will move beyond design changes, driving the strategic redesign of the user experience to meet global standards, optimize business goals, and enhance user engagement.

Achieving Global UX Standards:

• The existing platform’s specifications are heavily skewed towards Japanese domestic users, potentially leading to friction for U.S., Vietnamese, and other international users.
• Additional objective on top of user-side of design update is the redesign of the Internal Operations Admin Panel, currently inefficient due to outdated specifications, to boost the productivity of our global operations teams.
  　

Strategic Differentiation:

• Establishing a distinctive user experience that clearly differentiates Portrich from major competitors in the U.S. market.
  　

Long-Term Vision:

• Designing a scalable and future-proof platform capable of supporting expansion into Europe and other global markets.

　
◼︎Essential Skills & Experiences

• Experience leading Information Architecture (IA) and UI/UX design for B2B SaaS or enterprise/business applications
• Demonstrated experience designing both customer-facing applications and complex internal business/admin tools.
• Expert proficiency in Figma for design, prototyping, and collaboration
• Strong communication and collaboration skills to articulate design rationale clearly to the engineering and operation teams.
• A highly proactive and self-driven approach, the ability to move beyond taking instruction to proposing strategic solutions based on business objectives.
  　

◼︎ Preferred Skills & Knowledge (Nice-to-Haves)

• Understanding of front-end engineering, enabling design decisions that are technically feasible and efficient to implement.
• Knowledge or professional experience in logistics, supply chain, freight forwarding, or cross-border e-commerce.
• Experience in designing services for international audiences or in a bilingual work environment

◼︎Ideal Candidate Profile

• Proactive Ownership: You are a self-starter. We are looking for individuals who can move beyond waiting for direction, actively identifying problems and proposing solutions to drive the project forward.
• Strategic Design Leadership: The ability to engage in dialogue with leadership, distill complex business needs into clear requirements, and present a concrete design strategy that directly achieves company objectives.
• Cross-Functional Collaboration: Strong collaborative skills to work effectively with both the Development Team and the Operations Team. Must be able to exchange opinions frankly and drive initiatives forward as a unified team.
  　

Work Style & Logistics

• Location: Fully Remote
• Work hours: Part-Time (Approximately 64–80 hours per month / 16–20 hours per week). (Preference for candidates able to commit to the higher end of the range)
  　

Others

• Tools: We use Slack for internal communication.
• Compensation: Negotiable, based on your experience and skill set.
• Contract Condition: We aim for a long-term collaboration if the initial contract period is a mutual fit.
• Interview Process: Expected to involve only one interview/meeting.