Frontend Engineer

About PayPay Card PayPay Card Corporation was established in 2021 to provide users a FinTech service that is more accessible and convenient compared to previous credit cards and credit services, by integrating with the PayPay payment platform, which has surpassed 69 million users since its launch (as of May 2025).

We are looking for people who are passionate about refining our products at an overwhelming speed that other companies cannot match, as well as professionals who are interested in promoting the spread of cashless payments in Japan and the use of these payments as a financial life platform. Let us work together to create new value for users. ※ Please note that you cannot apply or be selected in parallel with PayPay Corporation, PayPay Card Corporation and PayPay Securities Corporation.

Job Description We are looking for web frontend engineers to work on the PayPay Card mini-application, and other web frontend, with a laser focus on scalability and maintainability. PayPay Card aims at revolutionizing the credit card industry, making payment easier than ever, from two different angles:

Bring the credit card experience to the next level: we have many functionalities in the pipe to

improve our product, not to mention the integration into the PayPay ecosystem as PayPay Card is part of the PayPay Group.

(Re-)architect our systems landscape: we want to reassess our frontend systems relevancy and update the architecture according to our product & technical roadmap. It is bundled with difficult design challenges to solve: we simply want to get it right.

As a fast-paced company leading the payments industry, we need our engineers to be versatile and enthusiastic to take on new challenges in order to stay at the forefront. Indeed, we strive for continuous improvement within our systems as well as outside our systems. Additionally, we value communication, to smoothly cooperate with other teams, and inclusivity, to efficiently navigate in a multicultural environment.

Responsibilities

Work with Product Managers, Designers and various tech teams to implement features. Contribute to the team by sharing knowledge, participating in code reviews, and providing

feedback to uphold and ensure best practices. Support architecture improvements Triage, debug, and resolve product issues.

Tech Stack

We currently work with Frontend web application:

Main implementation is in Nuxt 3 (Vue.js 3, TypeScript) Storybook is used for component visualization and UI testing Form validation is handled by Vee-validate Google Analytics is used for product reporting Web application are deployed on AWS ECS, in a Docker container

Coding environment: GitHub, Visual Code Documentation & Project management: Confluence, Miro, JIRA Communication: Slack, Zoom, Office 365

Please note that PayPay Card is challenging its current architecture, potentially introducing new technologies and/or deprecating existing ones. Required Qualifications

At least 3 years of industry experience developing secure web frontend applications in JavaScript and/or TypeScript.

At least 1 year of industry experience with VueJS (preferred), or React. Software engineering best practices and computer science knowledge. English business proficiency

Preferred Qualifications

Experience with frontend performance monitoring and optimization. Experience with designing server side RESTful APIs. Experience with web hosting infrastructure such as CDNs. Knowledge in web components and/or island architecture. Experience in a multicultural environment Japanese conversational proficiency is a plus

Working Conditions

Employment Status

Full Time

Office Location

Tokyo Office You can live anywhere in Japan

Work Hours

Full Flex Time (No Core Time) In principle, 9:00am ~ 5:45pm (actual working hours: 7h45m + 1h break)

Holidays

Every Sat/Sun/National holidays (In Japan)/New Year's break/Company-designated Special days

Paid leave

Annual leave (up to 14 days in the first year, granted proportionally according to the month of employment. Can be used from the date of hire)

Personal leave (5 days each year, granted proportionally according to the month of employment) ＊PayPay Group's own special paid leave system, which can be used to attend to illnesses, injuries, hospital visits, etc., of the employee, family members, pets, etc.

Salary

Annual salary paid in 12 installments (monthly) Reviewed once a year Special Incentive once a year *Based on company performance and individual contribution and

evaluation Overtime allowance, Late overtime allowance, Commuting and transportation expenses, Work

style support allowance

Benefits

Social Insurance (health insurance, employee pension, employment insurance and compensation insurance)

401K

Senior Manager QA - Travel Development Department(TDD) Job Description: Business Overview Rakuten is one of the leading e-commerce companies in the world. Our mission is to empower people

and society through the internet while aiming at becoming the Global Innovation Company. Department Overview This QA team is responsible of the Quality Assurance of the Commerce & Marketing services. You

can be involved in leading e-commerce services, and develop your skills in a global environment. Position: Why We Hire “Speed up Japan’s largest business ecosystem through quality.”

The mission of this position is to oversee the quality strategy for dozens of diverse commerce services, including Rakuten Travel, and to lead our global QA organization of approximately 120 members. We are not just looking for someone to 'manage testing'; we are seeking a leader who can maximize business growth through technical innovation, such as driving test automation using AI and elevating the engineering capabilities of the entire organization. We are currently in a pivotal phase of redefining what QA means. Together with our 120 team members, let’s build world-class quality assurance. Your leadership has the power to transform the future of Rakuten’s services and, by extension, the future of services in Japan. We look forward to receiving your application.

Attractiveness

- Huge business scale and real impact: You will oversee dozens of services - from Rakuten Travel and other services that support daily life in

Japan, to booking and leisure businesses. Your decisions will directly affect a very large number of users - Leading a strong team of 120 people:

You will lead a global team of about 120 people (mostly full-time employees) with many nationalities and backgrounds. This is a rare and valuable leadership experience for your career - Investment in cutting-edge tech and fast execution:

With Rakuten Group’s strong infrastructure, you can build, customize, and roll out tools like Playwright and AI tools in-house, with a lot of technical freedom and speed

Position Details As a “manager of managers” leading about 10 managers, you will have these broad responsibilities:

- Create and execute org strategy: Formulating mid- to long-term QA roadmaps and optimizing resources for an organization of 120 members - People management: Develop and grow managers (mentoring/coaching) and build the next generation of leaders - Driving AI-powered QA: Introduce Rakuten’s AI tools and the latest automation tech to teams, and lead QA process efficiency improvements - Stakeholder management: Aligned QA strategies with business requirements through close collaboration with development leadership - Global Governance: Cultivating a unified culture across cross-border teams (Japan/China) and establishing global QA standards

Work Environment Team Structure

- Total QA organization: about 120 people - Age range: mostly in their 30s to 40s - Team size: each QA team has about 5 to 10 people. It’s a global environment where both English and Japanese are used, and people actively share opinions while doing QA work - Continuous learning culture: the org strongly supports ongoing growth as QA professionals, through weekly section meetings for technical sharing and support for speaking at overseas conferences - Psychological safety: regular 1-on-1s, and a flat environment where anyone can speak openly regardless of title

Employee Background - Managers and QA leads who have experience leading QA organizations at global tech companies - Test engineers who used to manage large projects at SI/system integrator companies and then moved into Agile/DevOps ways of working - Specialists with deep expertise in test automation and SDET (Software Engineer in Test), who have improved and transformed organizations through technology

Development Tools

- Test automation: Playwright, Appium - CI/CD: Jenkins

- AI/tools: Rakuten AI (our in-house AI platform), an internally built test management tool - Collaboration: Jira, Confluence

Mandatory Qualifications: - Large-team management experience: Experience managing a team of 20+ people, or 5+ years of

experience managing managers (a “manager of managers” role) - Global communication: Business-level communication skills in English (about TOEIC 800+ level) - Change management: A track record of improving and transforming an organization by not sticking to old processes and by adopting new technologies (like AI) and new ways of working

Desired Qualifications: - Experience doing QA for a large e-commerce or travel service

- Experience in architecting test automation frameworks from scratch, as well as driving large-scale modernization of existing systems - Experience collaborating with and managing overseas offices (offshore/nearshore) - Advanced certifications such as ISTQB Advanced Level - Deep QA expertise: 10+ years of experience creating and running QA strategies based on software testing theory (like ISTQB) - At least 6 years of experience in system test management, including planning, test design, test implementation, and quality assessment for both manual and automated system tests - At least 5 years of experience leading multiple projects simultaneously in QA or development - Business level communication in Japanese

Other Information: Additional information on Location Rakuten Crimson House (Head office) Additional information on English Qualification TOEIC Score exceeding 800 (or similar level of English ability) or a University Degree earned in an

English-speaking country. Proof of qualifications will be required by the time of the job offer. If no evidence is available to prove the qualifications denoted above, taking an IP test, organized by Rakuten, during selection process is required.

Rakuten Group, Inc. Homepage Link

- Benefits:https://corp.rakuten.co.jp/careers/benefit/ - Recruitment Information:https://corp.rakuten.co.jp/careers/information/ - Rakuten Culture:https://corp.rakuten.co.jp/careers/culture/

Job Description Synspective Inc. Department： Satellite Development Dept. 1

Position 　　　　　　AOCS Engineer

Team and Role

About Dept. and Unit

We are looking for a talented and motivated new colleague to join Synspective's Onboard Software Team. Our team is responsible for the design, development, testing and maintenance of the embedded software running inside Synspective’s satellites. We are a small team where control engineers and embedded software engineers work closely together.

The Onboard Software Team is part of the Satellite System Development Dept. No1, which is responsible for the development of the satellite system.

Responsibility Attitude and Orbit Control System (AOCS) design, analysis, implementation, testing and maintenance.

Details of work - Design, implement, test, and validate algorithms used in the AOCS of Synspective's Synthetic Aperture Radar (SAR) satellites, such as: sensor data filtering, orbit and attitude estimation, attitude controller, reaction wheels and magnetorquer control, operation modes control, failsafe mechanisms, etc.

- Work closely with the embedded software engineers to integrate the AOCS into the rest of the flight software.

- Validate the design through unit testing, Model In the Loop Simulation (MILS), Hardware In the Loop Simulation (HILS), and tests on the physical satellite.

- Assist the testing and validation of the AOCS components during the satellite Assembly Integration and Testing (AIT) process.

- Model sensors, actuators, and other physical components in MATLAB/Simulink/Simscape and fit the component model using test data.

- Take part in the launch campaign: prepare the necessary items for launch operation, monitor the behavior during the critical phase, and provide technical support to the satellite operation team.

- Participate in weekly meetings and design reviews.

Selling points of this role

- Great opportunity for growth as an engineer. - See the complete lifecycle of a satellite, from the early design to

the launch and in-orbit operation. - Work in an international team.

Scope of Change

Inside the Satellite Development Department 1

Requirements Minimum qualifications

- Bachelor’s degree in Aerospace Engineering, Control Engineering, Electrical Engineering, or Robotics Engineering. We will consider an equivalent combination of relevant education and/or experience.

- At least 3 years of hands-on experience in the design and validation of control systems, preferably on autonomous systems (satellite, launch vehicle, drone, Unmanned Aerial Vehicle (UAV), self-driving car, robot, etc.).

- Thorough understanding of multibody dynamics: coordinate transformation between reference frames, kinematics, conservation of energy and momentum, etc.

- Strong analytical and communication skills. - Strong experience with MATLAB/Simulink. - Experience working with physical sensors and actuators. - Willingness to travel to Synspective's factory (Yamato-city) on

business trips several times a year.

Preferred qualifications

- Knowledge of orbital mechanics and satellite dynamics. - Experience in the design, implementation and testing of

spacecraft attitude and orbit control algorithms. - Experience in modeling physical components such as sensors

and actuators in MATLAB/Simulink. - Experience in control law design, beyond classical techniques:

non-linear design, optimal design. - Experience in state estimation using Kalman filtering and

anomaly detection algorithms. - Experience in model identification. - Knowledge of GNC hardware components such as: reaction

wheels, magnetorquers, GPS receivers, gyroscopes, star trackers.

- Experience in modeling finite state machines in Stateflow. - Experience programming in C/C++. - Experience in generating C/C++ code from Simulink.

Work Location Work Location ①

Office: Headquarters Address: 3-10-3 Miyoshi, Koto City, Tokyo

Passive smoking Measures ・Smoking is prohibited indoors in principle (the designated outdoor smoking area is available)

Scope of Change

Working locations can be specified by the company (including locations other than where employees usually work, "Remote Work")

Employment Term of Employment

Permanent

Probation Period 3 months after joining Working conditions during the probation period: Same

Estimated Annual Salary

6〜6.5 million yen

Payment Term Monthly ( 1/12 of the above estimated annual income)

Monthly Salary 500,000〜542,000 yen

Commutation Allowance

Paid in accordance with company regulations

Note (1)Basic Pay 381,000~414,000 yen (excluding (2) allowance)

(2)Overtime allowance Regardless of whether or not overtime or late-night work is performed,

- Fixed overtime allowance for 30 hours is included: 89,000 to 96,000 yen late-night work allowance of 50 hours is included

- 30,000 to 32,000 yen

(3)Extra wages are paid for overtime and late-night work more than the above hours.

Working hours systems

Discretionary Work System for Professional Work

Working hour 9:00〜18:00

Break 12:00 ～13:00

Expected daily work hours

8 hours

Break 60 min

Core time 11:00〜15:00

Overtime Yes 8 hours of work per day is considered to be worked under the Discretionary Work System for Professional Work

Overtime Allowance

Yes Excessed hours of fixed overtime or fixed late-night work hours are paid

Off・Holidays 122 days annually ※Year of 2024 details）Weekends (Saturdays and Sundays), National Holidays, Year-end and New Year's holidays (Dec 29th to Jan 3rd)

Retirement package

None

Insurance Health Insurance, Welfare Pension, Unemployment Insurance, Workers’ Compensation insurance,

Side Business Allowed ※Double employment contracts are not allowed

About Company Scope of Business

Solution services using satellite data, and development and operation of small synthetic aperture radar satellites

About us Synspective provides SAR data and remote monitoring services to government agencies and companies worldwide. We also provide SAR data from our satellites to data analysis companies developing their own data products and solutions. Together, a SAR data ecosystem is taking shape that will transform how we as humans manage our environment, natural resources, and exposure to risk.

Note ・Company Video：https://www.youtube.com/watch?v=Dou3mU6RiSc ・Website：https://synspective.com/jp/ ・Recruitment page：https://synspective.com/jp/recruit/