Haken Product Manager - E-Commerce UI - UX & Front-End | Tokyo

Join one of Japan's leading e-commerce and digital technology organisations as a Bilingual Product Manager - E-Commerce Front-End, supporting the development and improvement of high-traffic consumer-facing web and mobile services in Tokyo.

This contract opportunity focuses on digital product management, UI/UX, front-end development requirements, functional specifications, web and mobile applications, and cross-functional project coordination within a major Japanese online marketplace ecosystem.

You will play a central role in defining how user-facing features are designed, documented, developed and delivered, ensuring that product requirements are translated into clear and actionable technical specifications.

A key responsibility will be creating and maintaining detailed functional specifications for web and mobile interfaces, translating UI designs and business requirements into documentation that engineering and QA teams can use effectively.

Working closely with software engineers, UI/UX designers, QA specialists and business stakeholders, you will help ensure that product functionality, technical implementation and user experience objectives remain aligned throughout the development lifecycle.

The position requires a practical understanding of consumer-facing digital products, particularly the navigation, usability and interaction patterns that influence customer experiences on e-commerce platforms.

You will coordinate across multiple teams to clarify product requirements, manage documentation and support the delivery of front-end features within established project workflows.

The role involves participating in mid-to-large-scale technology projects, collaborating with cross-functional groups of 10 or more team members and maintaining effective communication across different disciplines.

You will support the continuous refinement of website navigation, mobile application experiences and user-facing product features, incorporating stakeholder feedback and evolving project priorities.

Strong Japanese-English bilingual communication is important, as you will work in an international environment where both languages are used in day-to-day collaboration and product documentation.

You will help bridge business and technical teams by explaining requirements clearly, resolving ambiguities and maintaining accurate records of agreed functionality.

The successful candidate will bring a structured, detail-oriented approach to product documentation, requirements management and stakeholder coordination, alongside the adaptability needed in a fast-paced digital product environment.

Familiarity with Jira, Confluence, basic software implementation concepts and SEO fundamentals would be beneficial when coordinating project workflows and discussing front-end improvements.

The role offers the opportunity to contribute to digital services used by millions of consumers and merchants across Japan, making your work visible within a major e-commerce platform.

This is an excellent opportunity for a Product Manager, Technical Product Manager, Product Owner, Business Analyst or UI/UX-focused digital product professional seeking a long-term contract opportunity in Tokyo's e-commerce technology sector.

Key Responsibilities

• Define and document product requirements and functional specifications for consumer-facing e-commerce web and mobile applications.
• Translate UI designs, user experience requirements and business objectives into clear, detailed and actionable functional documentation.
• Collaborate closely with software engineers and QA teams throughout development, testing and feature validation.
• Coordinate with UI/UX designers, business stakeholders and technical teams to align on front-end product functionality.
• Manage product documentation, specification updates and project workflows to support timely cross-functional delivery.
• Clarify feature requirements, user interactions and interface behaviours for implementation teams.
• Support the development and improvement of website navigation, mobile application usability and front-end user experiences.
• Incorporate stakeholder feedback and project objectives into ongoing product and feature refinements.
• Participate in mid-to-large-scale digital development projects involving multidisciplinary teams of 10 or more members.
• Facilitate communication between Japanese-speaking and English-speaking stakeholders to ensure shared understanding of requirements.
• Work with engineering teams to discuss implementation considerations, technical constraints and functional behaviour.
• Coordinate with QA specialists to ensure product specifications and expected user-facing functionality are clearly understood during testing.
• Maintain accurate, structured and accessible product requirements, feature documentation and project records.
• Use established project management and documentation workflows, potentially including Jira and Confluence, where applicable.
• Contribute to the continuous improvement of front-end product experiences and user-facing features across web and mobile services.

Required Skills and Qualifications

Experience:

• Approximately 5+ years of experience creating functional specifications for consumer-facing web or mobile applications.
• Proven ability to translate UI designs and business requirements into detailed functional documentation.
• Hands-on experience contributing to mid-to-large-scale digital or technology projects.
• Experience working with cross-functional teams of 10 or more members, including technical and non-technical stakeholders.
• Practical understanding of web and mobile application functionality, front-end interfaces and user experience requirements.
• Experience collaborating with software engineers, designers and QA teams during product development and testing.
• Strong ability to create clear, accurate and structured written specifications that support implementation.
• Experience coordinating product requirements, project documentation and stakeholder feedback.
• Ability to communicate effectively across business, product and technical teams in a bilingual working environment.

Soft Skills:

• Strong collaborative and team-oriented mindset when working with engineers, designers and business stakeholders.
• Excellent attention to detail and structured thinking when preparing product specifications and documentation.
• Clear, proactive written and verbal communication skills across Japanese-speaking and English-speaking teams.
• Ability to clarify complex requirements and communicate them in an accessible manner.
• Adaptability and initiative in a fast-paced, multicultural project environment.
• Strong organisation and coordination skills when managing documentation and cross-functional deliverables.
• User-focused approach to product improvement, navigation and digital customer experiences.

Language Requirements:

• Japanese: Practical conversational-to-business proficiency required for collaboration with local teams; JLPT N2 or above is a useful benchmark.
• English: Practical conversational-to-business proficiency required for international collaboration; TOEIC 600 or above is a useful benchmark. Strong written documentation skills are important.

Preferred Skills & Qualifications

• Familiarity with Jira for project tracking, issue management and cross-functional workflows.
• Experience using Confluence or similar platforms for product documentation and knowledge sharing.
• Basic technical literacy to discuss software implementation details, front-end functionality and engineering considerations.
• Foundational understanding of Search Engine Optimisation (SEO) and its relevance to consumer-facing web experiences.
• Experience supporting e-commerce platforms, online marketplaces or high-traffic digital consumer services.
• Familiarity with UI/UX design processes, interface specifications and website navigation improvements.
• Experience working in international product teams where Japanese and English are used regularly.
• Ability to bridge local Japanese stakeholders and global technical or business teams.
• Exposure to large-scale digital platforms serving substantial consumer or merchant audiences.
• Experience supporting long-term product development projects with multiple teams and evolving requirements.

About the Company

Our client is one of Japan's leading digital commerce and technology organisations, operating a major online marketplace ecosystem serving consumers and merchants nationwide.

The business supports a large-scale digital platform used by millions of shoppers and businesses across Japan, making reliable and intuitive web and mobile experiences central to its operations.

Based in Setagaya, Tokyo, the organisation brings together product professionals, software engineers, designers and business stakeholders to develop and improve consumer-facing digital services.

The company operates in an international, innovation-driven environment, with Japanese and English both actively used across product teams.

Its digital product teams collaborate to define requirements, improve user experiences and deliver features that support the needs of a substantial online customer base.

With a strong focus on e-commerce technology, front-end usability and cross-functional product development, the organisation offers exposure to complex digital products and established development processes.

The Bilingual Product Manager will contribute directly to the documentation and coordination of front-end product features, working closely with engineering, QA and business teams.

The position offers the opportunity to support a long-term digital product project within an established technology organisation while developing expertise in product requirements and large-scale e-commerce applications.

Joining this environment provides valuable exposure to Japanese digital commerce, international product collaboration and high-traffic web and mobile services.

Why You'll Love Working Here

• Join one of Japan's leading e-commerce and digital technology organisations.
• Work on web and mobile products used by millions of consumers and merchants.
• Help shape front-end features, user interfaces and digital customer experiences.
• Gain practical experience in product requirements definition and functional specification development.
• Collaborate with software engineers, UI/UX designers, QA specialists and business teams.
• Work in an international, bilingual Japanese-English product environment.
• Contribute to mid-to-large-scale technology projects involving cross-functional teams.
• Play a visible role in improving website navigation and mobile application usability.
• Develop your expertise in digital product management, UI/UX and e-commerce technology.
• Strengthen your skills in technical documentation and stakeholder coordination.
• Gain exposure to large-scale online marketplace systems and consumer-facing digital platforms.
• Benefit from standard daytime working hours of 9:00-17:30.
• Enjoy weekends and Japanese national holidays off, supporting a healthy work-life balance.
• Work with an established product organisation in Setagaya, Tokyo.
• Contribute to a long-term project focused on meaningful front-end product improvements.
• Build your career in product management, technical product ownership and digital platform development through a contract opportunity in Tokyo.

Don't Miss Out - Apply Now!