Senior UI/UX Engineer

★Senior UIUX Engineer Business Level Japanese Required ◆ Flextime & Hybrid Work ◆ In-house SaaS Products ◆ Annual Salary： 9 million ～ 15 million yen. -------------【About the company】------------- 【About the Company】 The company aims to transform "work"—which occupies the majority of one's life—into something inherently more meaningful. It believes that by expanding one's potential through work and connecting with people and society, life as a whole becomes richer. The vision the company strives to realize is a society where individuals feel excitement and a sense of fulfillment through their professional lives. It believes that the accumulation of these experiences adds color to people’s lives and ultimately leads society in a better direction. Driven by this philosophy, the company provides its own products and culture to expand "options and possibilities in work," making every day more enriching. 【Business Overview】 The company provides products designed to improve the way people work, with a specific focus on the meeting experience. Regardless of whether a team works in-office, in a hybrid model, or fully remote, the company believes that the key to improving work styles lies in "meetings," and has supported many organizations in transforming their corporate cultures. In recent years, the company has also focused on developing AI-powered meeting scheduling functions and creating new office experiences through robot integration. The business continues to expand with the goal of building environments where everyone can feel excited and inspired while they work. -------------【 Job Description】------------- The company is currently in a phase of redesigning its product from the core to realize its vision of "WorkstyleOS." WorkstyleOS is an "OS for working" that connects offices, remote setups, people, and spaces. The core of the product lies in unifying diverse touchpoints—such as meeting room reservations, check-ins/check-outs, visitor management, smart lock integrations, and video conferencing systems like Zoom and Google Meet—into a single, seamless experience. When this vision is fully realized, it will change how we work. As data on "who worked, where, and how" naturally accumulates day by day, it becomes possible to optimize the matching of people and workspaces. It opens up a world where data-driven insights reveal dynamics like: "This team outputs higher-quality work on days they gather physically," or "This individual's performance peaks when they can focus in a quiet, private room." Every worker will naturally be able to choose the environment and workstyle that suits them best, driving up productivity and engagement not through enforcement, but through the sheer quality of the experience. The company is committed to building this future through its product. In achieving this vision, it is no exaggeration to say that the quality of the user experience (UX) represents the entirety of the company's competitive advantage. Unlocking smart locks, checking into meeting rooms, welcoming visitors—none of these actions should ever require the user to stop and think. The goal is to prevent users from pausing in front of screens, eliminate the friction of manual input, and make them feel as if they aren’t even "operating a screen" at all. Designing this type of zero-friction experience is precisely what WorkstyleOS is set to achieve. 【Recruitment Background】 Alongside the expansion of product features, the company is establishing a brand-new UI/UX team. As a core member of this team, this position will take end-to-end ownership—from the initial stages of experience design to implementation, measurement, and continuous improvement. Working in close collaboration with PdMs and other departments, you will be expected to pursue not just "how it looks," but "how it feels." 【Responsibilities】 ◆ UX Design and Product Experience Creation ・Experience design aimed at zero input friction and cognitive load (information architecture, interaction design, prototyping) ・Designing user experiences that extend beyond the screen (including smart locks, IoT devices, and integration with external services) ・Hypothesis validation through user research and usability testing ・Building and maintaining design systems ◆ Full-Stack Development ・Front-end: High-quality UI development using TypeScript, React, and Vue.js ・Back-end: API design and BFF implementation using Node.js, Go, and Ruby ・Performance optimization and accessibility support ・Design and implementation of end-to-end and unit tests ◆ Driving the Product Improvement Cycle ・Take full responsibility for the entire cycle of feature planning, design, implementation, measurement, and improvement ・Gain insights through data analysis and A/B testing ・Lead and mentor team members in technical decision-making 【Position Highlights】 ・Design user experiences that bridge the physical and digital worlds, featuring integrations with smart locks, IoT devices, and video conferencing systems. ・Participate from the stage of "defining the experience" rather than just building and implementing specs. ・Join as a core team member during a phase where the entire experience is being rebuilt from scratch to realize the WorkstyleOS. ・Leverage a state-of-the-art development environment utilizing Claude Max, AI software engineering agents (such as Devin), and other advanced tools. ・Opportunities to step up into leadership roles, such as UI/UX Team Lead or Tech Lead, based on performance and achievements. 【Technology Stack】 *The current primary technologies are listed for reference only. They are subject to change as the product evolves, and you are not required to have mastered all of these skills in advance. Frontend: TypeScript, React, Vue.js Backend: Node.js, Go, Ruby Infrastructure: AWS (ECS Fargate, Lambda, etc.) Database: PostgreSQL (Aurora) IaC: Terraform, AWS CDK Monitoring: Datadog Incident Management: Opsgenie Version Control: GitHub Issue Tracking: Jira -------------【 Requirements】------------- Required ・Experience in developing and operating full-stack web applications (5+ years) ・Experience designing and implementing “frictionless input experiences” and “user experiences that extend beyond the screen” (Candidates with experience in experience design—including smart device integration, IoT, external service integration, voice and gesture controls, etc.—are welcome) ・Experience developing SPAs using JavaScript frameworks (React, Vue.js, etc.) (3+ years) ・Experience designing and implementing backend APIs ・Experience improving UX based on user research and quantitative and qualitative data Preferred ・Experience building and maintaining design systems ・Experience developing software that integrates with smart locks, IoT devices, and hardware ・Experience integrating with external APIs such as Zoom, Google Workspace, and Microsoft Teams ・Practical experience with performance optimization and improving Core Web Vitals ・Experience leading technical efforts as a team leader or tech lead ・Practical experience with accessibility compliance (e.g., WCAG) Ideal Applicants ・Deeply committed to crafting experiences that do not just feel "easy to use," but are so seamless that their very presence goes unnoticed. ・Not confined by the boundaries between design and engineering, taking complete ownership of the overall quality of the product. ・Capable of autonomously driving the cycle of hypothesis, implementation, measurement, and continuous optimization. ・Shares a strong alignment with the WorkstyleOS vision to "redefine the work experience at the OS level." ・Enjoys fast-paced, evolving growth phases and has the ability to transform ambiguity into structured, elegant designs. -------------------------------------------------- 【Working Time 】 Flextime System 【 Welfare 】 ◆Standard Benefits ・Commutation Allowance: Reimbursed based on actual travel expenses. ・Comprehensive Social Insurance: Includes Health Insurance, Welfare Pension, Employment Insurance, and Industrial Accident Compensation Insurance. ◆Internal Systems ・Remote Work System: Support for flexible working locations. ・Flex-time System: Core hours and flexible start/end times. ・PC Selection: Choice between Mac or Windows laptops. ・Professional Development Support: Subsidies for attending study sessions, seminars, and training programs. ◆Allowances by Work Style The company offers specific allowances tailored to the work style (O-type, H-type, or R-type) chosen by the employee: ・"Taimatsu" (Torchbearer) Allowance: 30,000 JPY / month ・For O-type (Office-based) employees who work from the office 4+ days a week and take the lead in driving company culture from the physical workspace. ・Practice & Spread Allowance: 10,000 JPY / month ・For H-type (Hybrid) and R-type (Remote) employees to support their efforts and practices in maximizing productivity within a remote environment. ・Relocation Allowance: (Upon switching to O-type) ・Support for moving expenses when transitioning from R-type to O-type. ・200,000 JPY for single employees / 400,000 JPY for those with families. ・Lunch: (Available to all types ・Company-sponsored weekly lunch meetings held at the office to foster team communication. *Note: Specific allowances vary based on the selected work style (O/H/R). Further details will be provided during the interview process. 【 Holiday 】 Saturday/Sunday/National HolidayAnnual Paid LeaveNew Year HolidaySummer Holiday