Site Reliability Engineer (Bilingual SRE)

Tokyo, Japan

PayPay

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About PayPay

PayPay, a FinTech company that has achieved more than 70M (as of July 2025) since its launch in 2018, is rapidly expanding its business scale as a payment platform used by approximately one out of every two smartphone users in Japan.

The company has a diverse team of professionals from more than 50 countries and is building a world-class engineering organization.

Our biggest competitor is "cash".

They are seeking people who can accept this challenge positively, brush up on the product at a tremendous speed that other companies could never achieve, and who are passionate about promoting and spreading such a financial life platform in a short time along with professionalism.

PayPay is committed to maintaining a "Day 1" mindset, bringing to life visions of the future that no one else can even imagine.

At PayPay, we provide an environment where everyone can deliver outstanding performance as professionals, through a flexible work style that includes remote and office.

Experience life in Japan

Featured life in Japan

Position

At PayPay, we're constantly working on improving our systems and processes to support PayPay's exponential growth.

As an SRE at PayPay, we strive towards ensuring high availability and top-level performance so that our users can have flawless and reliable service exceeding expectations.

Considering PayPay's growth, we are looking for experienced SREs who can deliver insights into system bottlenecks and ensure system reliability and scalability, while increasing the number of services that our company offers.

We are looking for individuals who can bring informed and unique viewpoints, enjoy collaborating with a cross-functional team and are actively pushing boundaries to develop reliable and scalable solutions and positive user experiences.

Key Responsibilities

Analyze current technologies used in the company and develop monitoring and notification tools to improve observability and visibility.
Ensure system stability by pre-emptively verifying failure scenarios and implement solutions to reduce MTTR
Develop solutions to improve system performance with a focus on high availability, scalability and resilience
Integrate telemetry and alerting platforms to track and improve reliability of systems
Implement industry best practices for system development, configuration management and system deployment
Ensure seamless flow of information between teams by documenting knowledge gained
Be up to date on modern technologies and trends to advocate for inclusion within products if they add value

Participate in incident management including troubleshooting production issues, driving root cause analysis (RCA) and actively sharing lessons learned to improve system reliability and internal knowledge.

Your qualification

Experience troubleshooting, tuning high performance microservice architectures running on Kubernetes and AWS in highly available production environments.

5+ years experience in software development in Python, Java, Go, etc with strong fundamentals in data structures, algorithms, problem solving and complexity analysis.

During the selection process, you will have a coding challenge.
Curious and proactive in finding performance bottlenecks, scalability and resilience problem areas and addressing them.
Experience with observability tools and gathering data.
Database knowledge such as RDS, NoSQL, distributed TiDB, etc.
Excellent communication skills, collaborative and getting things done attitude.
Enjoy taking up a challenge and driving it to conclusion.
Ability to verbally communicate in both English and Japanese.

Preferred Qualifications

Container image management and optimization.
Experience in large distributed system architecture and capacity planning.
Understanding of IaC, automation tools, terraform, cloud formation, etc.
Background in SRE/DevOps concepts and implementation.
Experience in managing monitoring tools like CloudWatch, VictoriaMetrics, Prometheus and reporting with Snowflake and Sigma.
In depth knowledge of web technologies such as CloudFront, Nginx, etc.

Experience in designing, implementing or maintaining disaster recovery strategies and multi-region architecture to ensure high availability, resilience, and business continuity across critical systems.

Business proficiency level in both English and Japanese.

What we offer

Social Insurance (health insurance, employee pension, employment insurance and compensation insurance)
401K
Translation/Interpretation support
VISA sponsor + Relocation support

Additional details

PayPay 5 senses

Please refer PayPay 5 senses to learn what we value at work.

Working Conditions

Employment Status

Full Time

Office Location

Hybrid Workstyle (flexible working style including Remote and office)
There are no fixed rules regarding office attendance in Product group; it depends on each individual's discretion.
LIFE in JAPAN FACTBOOK

Work Hours

Super 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'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)
Based on skills, experience, and abilities
Reviewed once a year
Special Incentive once a year *Based on company performance and individual contribution and evaluation
Late overtime allowance
Payroll payment can be changed to digital salary payment "PayPay Paycheck" for an amount set by you

Java Python DevOps AWS Amazon Go Golang Kubernetes NoSQL SRE Prometheus RDS Site Reliability Site Reliability Engineer IaC CloudWatch Amazon Web Services
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