Performance Test Engineer

Remote OK - Anywhere in Japan
Full-time
May 29, 2025

Main Responsibilities

Design, maintain and enhance performance testing framework components
Develop a comprehensive performance testing strategy, including detailed Non-Functional Requirements (NFR). - Translate the requirements into appropriate test scenarios
Collaborate with engineering and product management teams to define performance requirements for new feature releases
Design, script and execute load, stress, stability, and scalability testing and deliver comprehensive reports to the project team
Review all performance test activities, write tests, test execution, collect metrics, create and manage testing schedules, report results and problems, and maintain documentation

Required Qualifications

3-5 years of experience with performance test simulations, performance analysis, and performance monitoring
Experience in creating test data and automating test reports, using any programming language
Strong understanding of performance test methodologies
Experience with performance testing tool, such as JMeter, LoadRunner, and Gatling
Willing to work in a highly dynamic environment with tight deadlines and ever changing priorities
Have excellent verbal communication skills and documentation skills
Business level in either English or Japanese (Native Japanese speaker or JLPT N1 equivalent)

Preferred Qualifications

Well versed in using Continuous Integration and Continuous Development tools, like Jenkins/Bitrise or any other
Strong data analysis and post processing skills to validate system performance
Experience in creating test strategy and test plans, and executing performance and load testing activities for large-scale, enterprise-class applications
ISTQB or equivalent certificate. ISTQB (Specialist) Performance Testing is a plus
Experience in testing mobile applications (Android and iOS)
Experience in proposing and introducing new QA tools in the test process
Experience in working on development in securities, finance, or similar industries
Experience in in-house service operation

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About PayPay Securities

PayPay Securities is redefining asset management in Japan as a key pillar of the PayPay financial ecosystem.

By building innovative products—such as Point Management, used by over 20 million people, and PayPay Asset Management, Japan’s first service enabling seamless investing directly within a payment app—we are making investing accessible, intuitive, and engaging for everyone.

As we enter our next phase of growth, we are tackling the massive technical challenge of transforming Japan’s financial landscape. We design, build, and scale our core securities engine entirely in-house—empowering us to craft intuitive, user-friendly investment experiences directly for everyone.

Japanese Language Policy
PayPay Securities started internationalizing their product teams in 2024. They are looking for someone who has business English proficiency, an open mind to embrace Japanese culture, and curiosity towards Securities.

PayPay Securities is on the move of creating an international-friendly environment like PayPay's Product Division, where English is the main language, and having interpreters who can provide simultaneous translation when necessary.

Please note that:
- For Engineers, Japanese language skills are not required but are beneficial to have.
- For Product Managers and Product Designers, business-level Japanese is a must.
Paid Leave
PayPay Securities offers National holidays (in Japan), Summer break (2 days), Year-End and New Year Holidays.

They also offer annual leave (1 to 10 days, depending on the month of joining, will be granted upon employment date for the 1st year).
Benefits
👶 Parental Leave

🧡 Interpretation support

💟 Complete health and social insurance

💚 Translation support
Engineer Interview Process
PayPay Securities hiring process are as below:

(1) Application Review (English CV is required)
(2) Coding Test or Take Home Assignment (only applied to required positions)
(3) 2-3 Interviews (including both technical and behavioral interview)
(4) Offer Meeting
Highlights of PayPay Securities

1. In-House Financial Core at Massive Scale
Powered by the 75M+ user PayPay ecosystem, we build and operate our entire core brokerage stack in-house. Our proprietary engine powers market-first innovations like sub-dollar (¥100) fractional trading and 24/7 order matching.

2. Next Stage of Growth: Re-Architecting While Shipping
As we enter our next growth phase, we are transitioning to a cloud-native microservices architecture while continuously shipping high-impact features. Engineers take full ownership to actively lead architectural redesigns and eliminate technical debt.

3. High Engineering Standards with "PayPay Speed"
We combine rapid weekly releases with robust safety nets, including automated API testing, AI code reviews, and comprehensive regression suites. Driven by a flat hierarchy and a "You Build It, You Run It" culture, engineers enjoy complete ownership from initial design to production deployment.

4. Global and Inclusive Engineering Culture
We are expanding a diverse, cross-cultural team operating on global engineering standards. We prioritize strong software engineering principles, proactive problem-solving, and cross-team collaboration over rigid financial domain requirements.