UI/UX Designer (part-time)

Development Team

On behalf of our Client, a well-established financial institution from the Japan, Mobilunity is looking for a UX/UI Designer for a part-time engagement.

It is start up building an AI-native auction platform for classic & enthusiast cars, launching in Japan and with plans expanding to global buyers. AI assists sellers by recognizing vehicles from photos, auto-suggesting metadata, and generating listing copy. Buyers get a modern, real-time auction experience. Payments run via Stripe; app consumes a GraphQL API. They need a UI/UX designer to shape the first customer-facing prototype.

Key Responsibilities:

Own UX/UI for three core flows:
1. Create Listing from photos → AI-assisted metadata & description
2. Auction Experience with real-time bidding
3. Logged-in Buyer Flow (win screen → payment handoff)
Create pixel-perfect designs in Figma (or Paraflow → Figma), ensuring visual continuity and a cohesive design language.
Produce developer-ready assets: component specs, redlines, interaction notes; ideally exportable HTML/CSS layouts for key screens.
Establish a lightweight design system (colors, type, spacing, components, states).
Design with i18n in mind (JP default; handle non-Latin scripts, variable text length).
Collaborate in short daily check-ins (EU morning); iterate quickly on feedback.
Support handoff to a React developer (Vite/Gatsby) integrating a GraphQL API.

Requirements:

3+ years UI/UX experience with a strong web product portfolio (marketplaces, fintech, or media a plus).
Expert in Figma (components, auto-layout, variants, prototypes); comfort reviewing Paraflow flows.
Proven i18n design chops (CJK or other non-Latin scripts; typography & layout for multi-byte languages).The designs will be in English but the launch in japanese, so previous work with asian or cyrilic languages would be good.
Experience crafting design systems and responsive UI for mobile-first web.
Ability to deliver clean, semantic HTML/CSS for core layouts (nice-to-have but strongly preferred).
Excellent communication; comfortable with async work and quick iterations.
English – Upper Intermediate and higher.

Nice to Have:

Automotive/enthusiast or e-commerce/auction experience.
Familiarity with GraphQL data shapes and dev handoff best practices.
Accessibility (WCAG) and performance awareness for mobile web.
Understanding of AI-assisted content/metadata workflows.

Engagement & Hours:

Part-time (approx. 15–20 hrs/week), for 2-3 weeks to deliver V1 of the three flows, with potential extension for refinement & additional screens.
Availability window: ability to meet once daily during EU morning overlap (UK ↔ Tokyo).

Come on board, and let’s grow together!