This position is closed and is no longer accepting applications.

Senior UI/UX Designer

KOMOJU Musashino-Shi, Tokyo August 13 2025
  • 💴 No salary range given
  • 🏡
    Fully remote
    From Japan
  • 🌏
    Apply from abroad
    Relocate to Japan
  • 💬
    No Japanese required
    Business English
  • 🧪
    Senior level
    Unspecified years of experience

About KOMOJU

KOMOJU Musashino-Shi, Tokyo

The leading cross-border payment gateway for Japan. We power payments for companies like video game distribution platform Steam and the popular mobile app TikTok.

Key benefits

  • Developer-centric, inclusive culture
  • International at our core
  • Generous holiday policy

About the position

KOMOJU by Degica is aiming to become a leader in payment gateways. Our mission is to make global commerce simple by helping merchants accept payments from customers worldwide. Many companies, from small merchants up to global corporate giants, expect KOMOJU to work reliably, quickly, safely and without effort on a large scale.

To achieve this goal, we recognize the importance of having a strong sense of brand and an excellent user experience in order to successfully distinguish KOMOJU from other payment gateways. The experience of our product will be what establishes us as a first-class solution to our merchant’s needs. That experience cannot be produced ad hoc. It requires attention and consistency throughout the entire KOMOJU product which is why we are now hiring a Product Design Architect / Lead UX Designer to steer our team to success.

Responsibilities

  • Lead the design process including user research, usability testing, wireframing and prototyping stages and high fidelity design.
  • Collaborate closely with Engineering and Product teams to ensure the design meets the needs and expectation of users.
  • Defining and building our design system to deliver an intuitive, user-friendly and consistent user experience to our users.
  • Validate designs and what we develop and look for areas of improvement in our web and mobile experiences
  • Work with Product Managers to identify top priorities and coordinate with engineering teams in the planning and execution of monthly development cycles
  • Help build out design standards, processes, tools.
  • Ability to build up and train others to support a growing UX/design team.

Requirements

  • Problem-solving and analytical skills
  • An understanding of design patterns
  • Extensive working knowledge of Figma
  • Excellent attention to detail
  • Knowledge of responsive design
  • Experience designing for accessibility
  • Strong communication skills for a remote-first environment
  • Ability to thrive in a multicultural and diverse workplace

Nice to haves

While not specifically required, tell us if you have any of the following.

  • You always put the user / customer first and you are able to quickly understand how users interact, use and work with our platform.
  • You feel confident in working with e-Commerce, online payments or fintech products and know how to deliver a great user experience that shows trust and reliability to the users.
  • You have a strong portfolio of past work and are able to talk passionately about your achievements.
  • You thrive in a fast-paced environment and can adapt quickly dynamic needs.

Hiring Process

  1. 1

    Initial screening call with HR

    To understand candidates’ overall professional background, career aspirations, and to evaluate the fit for the role/ culture.

  2. 2

    Take-home exercise

    It’s opportunity to evaluate candidates’ practical experience and observe that they follow best practices.This includes, but is not limited to, their coding skills, problem-solving abilities, system design capabilities and ability to optimize and maintain code. We normally give the applicant one week to complete it, but we don’t expect it to take more than 2 hours.

  3. 3

    Technical team interview

    This interview serves two purposes: it’s a chance to review the take-home exercise and assess the candidate’s technical abilities, and it also helps evaluate their soft skills, how well they collaborate with stakeholders and team members, manage their work (time management, prioritization, adaptability), and demonstrate a commitment to continuous learning.

  4. 4

    Final interview with leadership

    We’re looking here to assess culture add. We’re not looking for people that just fit the status quo (culture fit), we want candidates who can bring something new and valuable to our culture. While ensuring that they still align with our core values, we want to assess their ability to adapt to recent changes within the organization and to help guide the organization through its next stage of development.

Meet KOMOJU's Developers

Kazunori initially joined KOMOJU as a web application engineer, but by identifying problems he wanted to fix, his role shifted first to VP of Infrastructure, and then VP of Payment Products.

Read their story...

Nicole joined KOMOJU in 2020, and worked her way up to be technical lead of the merchant management team. She shares her journey, how KOMOJU supported her career growth and how the company is adapting to its growing needs.

Read their story...
Photo of Richard Ramsden

Becoming CTO of KOMOJU

with Richard Ramsden

After graduating from university, Richard came to Japan and found a job as a software developer. Eventually he joined KOMOJU, where he rose to the role of CTO.

Read their story...

Nigel was fresh out of college when he joined KOMOJU as a developer. He's now risen to tech lead, where he's helped build out their payment platform while maintaining a healthy work-life balance.

Read their story...

Muhammad Denaw, Senior Site Reliability Engineer at Komoju, talks about his work and shares how Komoju's trust and support propelled him to a promotion.

Read their story...

Head of Customer Engineering Makoto Mizukami describes the unconventional candidates his unique team is looking for.

Read their story...

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