Career Opportunity for a UI/UX Designer in Japan!

■ UI/UX Designer

■ Company Overview

 A leading Japanese e-commerce and internet services company, founded in 1997, operates one of the country’s largest online marketplaces, connecting millions of merchants and consumers. Beyond online retail, it has expanded into diverse sectors including fintech, digital content, telecommunications, and professional sports. Its ecosystem integrates shopping, payments, banking, credit cards, mobile services, and loyalty programs through a shared rewards system, creating a seamless experience across its platforms. Headquartered in Tokyo, the company has also grown globally, offering services in multiple regions and investing in innovation, AI, and cloud technologies to strengthen its digital infrastructure. 

■ Department Overview
● At AI for Business (AI4B), we are dedicated to helping people get things done seamlessly through our cutting-edge AI-driven solutions.
● Our team focuses on integrating Artificial Intelligence to eliminate friction and streamline workflows across industries.
● We operate within a diverse and dynamic environment, collaborating across various disciplines to create impactful technologies that empower effortless productivity worldwide.
● We're looking for a Generative AI UI/UX Designer to define the future of human-AI interaction.
● You'll turn ambiguity into clarity, experimenting with completely new UI/UX paradigms and creating effective interfaces for generative AI experiences across our AI for Business product portfolio.  

■ Your Role and Responsibilities 

As a UI/UX Designer, your key responsibilities are: -
● Create and iterate on user flows, wireframes, prototypes, and high-fidelity designs for generative AI features
● Own end-to-end design workflows from concept to implementation, weighing user experience against technical feasibility and business objectives ● Identify new AI opportunities, design concepts, and build prototypes to execute on strategic goals
● Shape product direction through breakthrough generative AI interface innovations
● Facilitate alignment and build unified product design vision across teams  

■ Experience and Qualifications

● Portfolio website required, showcasing your design process and solutions
● High standards for UI/UX design execution. Advanced Figma skills.
● Strong product design sense and problem-solving abilities to tackle new design challenges
● Extensive agentic coding experience (e.g., Claude Code, Cursor). Strong preference for candidates who have shipped products using agentic coding
● Strong storytelling and communication skills using mental models, mockups and other tools-for-thought to effectively communicate ideas to teams and senior stakeholders
● Bias towards shipping fast and iterating based on real user feedback
● Comfortable navigating abstract and unknown territories when exploring new AI ideas

■ Additional Preferred Qualifications

● 4+ years of experience designing UX and UI for software, with experience working with generative AI, LLMs, or conversational interfaces
● Natural curiosity for discovering simpler ways to tackle hard problems
● Experience with design research and user testing
● Knowledge of accessibility and inclusive design
● Japanese skills 

■ Work Location

Tokyo (Hybrid)
 

■ Salary 

To be decided based on your experience, skill set, and company policies.
Details will be shared during the interview process.

■ Language
● Fluent English communication skills (both written and spoken) are required as the team operates in English.
● Japanese language skills are not required but are considered a great plus.

 Details will be provided during the meeting.

Career Opportunity for a Software Developer Engineer (Test) in Japan!

■ Software Developer Engineer In Test (SDET)

■ Company Overview

This Japan-based fintech company offers a range of cloud-based financial solutions for individuals and businesses. Its services include personal finance management, household budgeting, expense tracking, and accounting software tailored for small to medium-sized enterprises. By integrating with banks, credit cards, and other financial institutions, it helps users automate and visualize their financial data, promoting better money management and efficiency in financial operations. The company is also known for its innovative approach to digital finance and has become a prominent player in Japan’s financial technology sector.

■ Position Details
● Has a positive attitude toward taking on new challenges
● Can communicate effectively with foreign engineers across multiple overseas locations
● Has experience in AI development or is interested in development using AI tools (AI Vision 2025)

■ Your Role and Responsibilities
● 3+ years of development experience or 3+ years of experience in test automation using scripting languages
● ISTQB Advanced Level certification or equivalent knowledge
● Bachelor’s degree in Information Technology or Computer Science, or equivalent knowledge (e.g., Fundamental Information Technology Engineer Examination) 

■ Language Requirements
● Japanese: Not required (preferred if available)
● English: Business-level proficiency (equivalent to TOEIC 700 or above), some projects require all communication—including meetings and written correspondence—to be conducted entirely in English.
● Candidates without qualifications equivalent to TOEIC 700 or above will be required to take a company-designated test during the selection process (generally after the first interview).

■ Good Reasons to Join

● Hybrid work culture 

■ Work Location

Tokyo, Japan
 

Details will be provided during the meeting.

Career Opportunity for a Back-end Engineer in Japan!

■ Job Title

Back- End Engineer

■ Company Overview

 A leading Japanese e-commerce and internet services company, founded in 1997, operates one of the country’s largest online marketplaces, connecting millions of merchants and consumers. Beyond online retail, it has expanded into diverse sectors including fintech, digital content, telecommunications, and professional sports. Its ecosystem integrates shopping, payments, banking, credit cards, mobile services, and loyalty programs through a shared rewards system, creating a seamless experience across its platforms. Headquartered in Tokyo, the company has also grown globally, offering services in multiple regions and investing in innovation, AI, and cloud technologies to strengthen its digital infrastructure.  

■ Your Role and Responsibilities 

● Over 6 years of experience in designing, developing, and operating large-scale Web APIs on Linux servers using Java and Spring Framework.
● Experience in table design / query creation for efficient utilization of RDBMS like Oracle Database and NoSQL databases like MongoDB/Redis, as well as experience with ElasticSearch.
● Experience with distributed development using GitHub/Bitbucket or similar version control systems and Pull Requests 

■ Desired Qualifications

● Experience in developing and operating messaging services such as Kafka and MQ.
●  Experience in operating high-traffic services, including performance tuning and access control.

■ Additional Preferred Qualifications

● Proactively involves others in order to solve problems or improve the situation - Having inquiring mind for various issues/items.
● Having passion to learn continuously in a fast-moving environment.
● Must be able to communicate effectively with various stakeholders
● Willing to tackle new challenges and drive improvements, NOT satisfied with the status quo and routine work.
● A good team-worker. Promote team-working culture within and outside of the team. 

■ Work Location

Tokyo (Hybrid)

 

■ Salary 

To be decided based on your experience, skill set, and company policies.
Details will be shared during the interview process.

Details will be provided during the meeting.

Career Opportunity for a Backend Engineer in Japan!

■ Job Title

Backend Engineer 

■ Company Overview

This Tokyo-based tech company, founded in 2010, has established itself as a dynamic and growing player with a strong focus on integrating AI into its product offerings and services. The profile highlights its use of modern AI technologies to improve business productivity and efficiency, with products that automate tasks like summarizing meeting minutes and generating emails, as well as its investment in research and development through a dedicated AI subsidiary. The organization appears to embrace an international work environment and offers a range of roles across engineering and AI domains, suggesting diversity in professional opportunities for tech talent. Overall, the profile paints a picture of an innovative, AI-driven company with a solid base in Japan’s tech scene and a forward-looking approach to product and talent development.   

■ Your Role and Responsibilities 

● As a Backend Engineer, you will lead the design, development, and operation of backend systems for JAPAN AI's product suite.
● You will design and build scalable, robust backend architectures and technical foundations for next-generation products utilizing AI agent technologies and large language models.
● We expect you to contribute to enhancing product value through collaboration with cross-functional teams.

■ Desired Qualifications

■ AI Product Development
● Design, develop, and operate backend systems for AI products
● Implement AI agent systems utilizing large language models (LLMs)
● Develop APIs for real-time speech processing and speech synthesis systems
● Build and optimize natural language processing pipelines 
■ System Architecture & Infrastructure
● Design distributed systems using microservices architecture
● Design and implement scalable APIs for high-traffic scenarios
● Containerization and Kubernetes operations on GCP
● Database design and query optimization for large-scale data processing 
■ Development Process & Quality Improvement
● Build and improve CI/CD pipelines
● Promote code reviews and test automation
● Build monitoring and log analysis systems
● Implement and operate based on security requirements
■ Machine Learning & AI Integration
● Integrate and deploy machine learning models to production environments
● Build and operate MLOps pipelines
● Optimize inference API performance and reduce latency
● Develop A/B testing infrastructure and support data analysis
■ Team Collaboration & Technical Leadership
● Collaborate with cross-functional teams (designers, product managers, project managers)
● Participate in technical selection and architecture decisions
● Research new technologies, build prototypes, and conduct technical validation o Improve and automate development processes

■ Additional Preferred Qualifications

● Bachelor's degree in Computer Science, Software Engineering, Artificial Intelligence, Machine Learning, Mathematics, Physics, or related fields, or equivalent practical experience 
● 5+ years of application development experience using Python 
● 3+ years of experience developing complex SaaS products or high-traffic B2B products 
● 3+ years of experience with cloud services (AWS, GCP, Azure) and container technologies (Docker, Kubernetes)
● Experience working at startups or growth-stage companies, or equivalent environments 
● Knowledge of and passion for AI-related technologies 

■ Work Location

Tokyo (Hybrid)

 

■ Salary 

To be decided based on your experience, skill set, and company policies.
Details will be shared during the interview process.

Details will be provided during the meeting.

Career Opportunity for a Fullstack Engineer in Japan!

■ Job Title

Fullstack Engineer

■ Company Overview

This Tokyo-based tech company, founded in 2010, has established itself as a dynamic and growing player with a strong focus on integrating AI into its product offerings and services. The profile highlights its use of modern AI technologies to improve business productivity and efficiency, with products that automate tasks like summarizing meeting minutes and generating emails, as well as its investment in research and development through a dedicated AI subsidiary. The organization appears to embrace an international work environment and offers a range of roles across engineering and AI domains, suggesting diversity in professional opportunities for tech talent. Overall, the profile paints a picture of an innovative, AI-driven company with a solid base in Japan’s tech scene and a forward-looking approach to product and talent development.   

■ Your Role and Responsibilities 

● You will be responsible for developing SaaS applications utilizing Generative AI.
● Your role will include designing and building highly efficient and reusable systems, as well as developing complex web applications.
● You will be responsible for developing SaaS applications utilizing Generative AI.
● Your role will include designing and building highly efficient and reusable systems, as well as developing complex web applications.
● Web Application Development:  Develop frontend applications using TypeScript and Next.js.

■ Desired Qualifications

● Languages: Python (for framework development), TypeScript / React / Next.js (for frontend development) / NX 
● Infrastructure: GCP (containers / Kubernetes), Docker 
● Tools: Slack, Confluence, Linear, Google Workspace, GitHub, Notion 
● Work Environment: Mac (Apple Silicon), dual monitors available 

■ Additional Preferred Qualifications

●  Candidates with the following experience or skills will be highly regarded:
● Experience in developing SaaS web applications.
● Experience in designing and building large-scale, complex architectures.
● Basic understanding and interest in Generative AI.
● Ability to stay updated on the latest technology trends and share knowledge within the organization. 

■ Work Location

Tokyo (Hybrid)

 

■ Salary 

To be decided based on your experience, skill set, and company policies.
Details will be shared during the interview process.

Details will be provided during the meeting.