Overview
【Hybrid】Quality Assurance Engineer Jobs in Greater Tokyo Area at Girasol Energy Inc. ヒラソル・エナジー株式会社
Title: 【Hybrid】Quality Assurance Engineer
Company: Girasol Energy Inc. ヒラソル・エナジー株式会社
Location: Greater Tokyo Area
※This job opening is only for candidates currently residing in Japan.
＜Summary＞
Position: QA Engineer – Energy Management System (No Japanese Required)
Salary: ¥4M–¥10M
Location: Tokyo / Hybrid work available
Employment Type: Permanent, Full-time
[Company Profile]
The company is a Japan-based energy technology company developing an Energy Management System (EMS) platform for renewable energy and grid-scale battery storage.
They develop integrated software that connects renewable energy facilities, battery storage systems, electricity market data, and operational systems. Their technology supports the stable and efficient use of renewable energy while contributing to the modernization of Japan’s energy infrastructure.
As the grid-scale battery storage market continues to grow, they are strengthening their capabilities in real-time control, system integration, data processing, and electricity market coordination.
Through the development of mission-critical software supporting essential infrastructure, they aim to contribute to both decarbonization and a stable electricity supply.
【Company/Job Appeal】
• No Japanese language skills are required
• Work on mission-critical systems supporting renewable energy and electricity infrastructure
• Take ownership of QA across APIs, backend systems, edge systems, data flows, and real-time control
• Gain experience in test automation, CI/CD integration, and AI-assisted testing
• Collaborate closely with backend, edge, infrastructure, and operations teams
• Flexible working hours and hybrid work options are available
[Job Description]
Quality Assurance and Testing
• Develop and execute test strategies for grid-scale battery storage systems
• Design and implement API tests for electricity market and grid coordination systems
• Perform integration testing between Energy Management Systems and battery storage systems
• Design tests for real-time control systems, including response validation within seconds-to-minutes ranges
• Validate batch processing and end-to-end data flows
• Design and automate regression testing
• Analyze the root causes of system failures and develop measures to prevent recurrence
Test Automation and Process Improvement
• Integrate automated testing into CI/CD pipelines
• Explore and implement AI-assisted approaches to improve testing efficiency
• Improve test coverage and visualize quality metrics
• Propose quality improvements across the entire software development lifecycle
Collaboration
• Work closely with backend, edge systems, and infrastructure development teams
• Participate in specification reviews and provide feedback from a quality perspective
• Collaborate with operations teams to monitor production quality
• Coordinate quality standards with external vendors
[Core Requirements]
▼Required Qualifications
• At least 3 years of professional experience as a Software QA Engineer
• Experience designing and executing tests for web applications or backend systems
• Experience testing systems with API integrations
• Experience creating test plans and managing their execution
• Experience working as a QA Engineer with development teams in an Agile environment
• Japanese language skills are not required
▼Preferred Qualifications
• QA experience involving edge devices
• Experience testing real-time systems or streaming data processing
• Experience implementing test automation frameworks such as Playwright or Selenium
• Experience operating automated tests within CI/CD pipelines
• Experience or a strong interest in AI-assisted testing
• QA experience in high-reliability industries such as energy, finance, or other critical infrastructure
• Experience designing and executing performance or load tests
• JSTQB or an equivalent software testing certification
[Ideal Candidate Profile]
• Able to design test strategies based on an understanding of business operations and actual system usage
• Believes that quality should be built throughout the entire software development lifecycle
• Able to explain technical issues clearly to non-engineers
• Comfortable working in a fast-paced and changing startup environment
• Motivated to contribute to mission-critical systems supporting social infrastructure
[Conditions]
Employment Type: Permanent, Full-time
Estimated Annual Salary: ¥4M–¥10M
Work Location: Tokyo
Remote Work: Available up to one day per week
Working Hours: Flexible working hours
Core Hours: 10:00–15:00
Standard Working Hours: 8 hours per day
Holidays: Saturdays, Sundays, national holidays, and year-end/New Year holidays
Annual Holidays: 125 days
Annual Paid Leave: 10 days or more after six months of employment
Benefits:
• Full social insurance coverage
• Commuting allowance
• Certification support program
• Training support program
• Reduced working-hour system
• Casual dress code
• Childcare and family support programs
• Relocation support
• Stock option program
• Continued employment and re-employment systems
[Selection Process]
• Two to three interview rounds
• Initial interviews may be conducted online
• At least one in-person interview in Tokyo is required
• The number and format of interviews may change depending on the candidate and position
