UI/UX Designer(English)

Tokyo
Partial Remote
Full-time
July 30, 2025

Overview

MicoVoice is Mico’ AI Voice platform reshaping how businesses communicate with customers by automating and personalizing phone-based conversations. We’re building a platform where businesses can easily design, manage, and deploy voice interactions without needing to be voice UX experts or engineers. The design team is focused on creating intuitive interfaces, seamless workflows, and a truly human-centered experience. Our mission is to empower users to set up smart, effective voice call flows with confidence and ease - no technical background required. We’re looking for a mid-level UI/UX Designer to help us make this vision a reality, as we build Mico Voice AI into Japan’s most innovative voice automation platform and a global leader in AI-powered communication.

Role Summary

As a Mid level UI/UX Designer reporting to our Senior leader, You will: Own the design of key features within the Mico Voice AI product, from discovery and ideation through to delivery and iteration. Collaborate cross-functionally with product managers, designers, engineers, and stakeholders to translate complex business and technical requirements into intuitive, sophisticated user experiences that deliver real value to users. In this role, you’ll help contribute to user research, and advocate for design best practices as we continue to grow and scale Mico Voice AI.

Key Responsibilities

User-Centered Design Design Creation

Conduct user research to identify workflows, pain points, and user needs, ensuring insights directly inform design decisions. Own the full design process end-to-end, from research and ideation to delivering polished, high-fidelity prototypes. Translate business and user requirements into intuitive user journeys and scalable design solutions. Create wireframes, prototypes, and high-fidelity UIs using Figma and complementary tools like Adobe Creative Cloud, aligning with business goals and user expectations.

Cross-Functional Collaboration

Work closely with product managers, designers, engineers, to ensure design solutions align with product goals, technical constraints, and delivery timelines. Work closely with engineering teams to support smooth implementation and ensure design quality throughout development. Work closely with CS teams to address user feedback and identify areas for product improvement. Participate actively in discussions around scope, priorities, and timelines to align on MVPs and Post-MVPs.

Design Excellence and Advocacy

Maintain consistency and quality in design work by adhering to the design system and following industry best practices. Advocate for user-centered design and contribute to raising UX standards across the company. Partner with product to help shape product requirements and user workflows when needed. Occasionally contribute to marketing design efforts (~10%)

Stakeholder Communication

Present and communicate design solutions clearly to internal stakeholders. Incorporate feedback constructively, balancing user needs, technical feasibility, and business goals.

Requirement

Proven experience (3-5 years) in UI/UX design, preferably in B2B or SaaS product environments
A portfolio demonstrating problem-solving, end-to-end thinking, and polished UI craft
Able to both think critically and execute designs visually,solid understanding of UX design principles, information architecture, and interaction design.
Experience with user research methods and applying findings to product iterations
Able to turn complex product requirements into intuitive, scalable design solutions
Excellent visual design skills with a sharp eye for typography, color harmony, spacing, and layout composition
Strong communication skills to collaborate with various stakeholders
Comfortable presenting design concepts and defending design rationale

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Design

About Mico

Mico's goal is to help companies build their brand through the power of conversation.

They are developing multiple products to analyze and improve communication between businesses and consumers, enabling businesses to optimize their online marketing efforts.

The conversational commerce (C-commerce) is a rapidly growing market, projected to surpass the e-commerce market in some countries by 2025.

Mico (formerly Micoworks) has already achieved 500% business growth in just two years, placing them at No.1 in LINE marketing within Japan. They’ve also secured a total of 6.3 billion yen in funding (with the recent Series B raising 3.5 billion yen).

Mico has set an ambitious goal to become Asia’s No.1 Brand Empowerment Company by 2030, with a clear vision for global expansion. Achieving this goal will require tackling numerous obstacles, and they’re looking for team members who are up to the challenge.

Here are the services you’ll be working on:

Mico Engage AI
A platform that enables seamless communication through message automation and deep integration with client systems.
Mico Voice AI
A service that enhances communication quality and efficiency using AI voice recognition, helping create meaningful connections.
BizClo
An enterprise messaging solution leveraging LINE, optimized for business use to improve customer relationships and internal efficiency.
Micomii
A LINE-based membership service for restaurants, enabling customer segmentation, rank-based perks, and digital coupons.

Why Work at Mico

Flexible work style: Hybrid work, flex time, and up to 6 Life-Health leave days per year to support diverse lifestyles.
Robust growth support: Subsidies up to ¥55,000/year for books and seminars, supporting personal skill and career development.
High transparency: Weekly TGIM meetings and quarterly company-wide updates to share vision and goals.
Leadership training: Strengthening team leadership and organizational management skills through training.
Fair evaluation system: OKRs-based performance reviews conducted semi-annually with continuous feedback.
Social impact: Contributing to clients’ business and workstyle transformation through innovative SaaS products.

Team Culture

Mico leadership and team embody an "OPEN MIND" approach, fostering open and inclusive communication across all levels.

Driven by a strong "ALL FOR ONE" spirit, team members work closely together, both internally and externally, with a "Giver Mindset" at the core of their collaboration.

Surrounded by highly motivated colleagues, you’ll find daily inspiration and opportunities for personal and professional growth.