Product Security - Infrastructure Security Engineer

About PayPay

PayPay, a FinTech company that has achieved more than 69M users (as of May 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.

Position

The PayPay Product Security team is looking for experienced infrastructure security engineers to lead improvements to our infrastructure and operational security, and introduce key security solutions, such as SOAR.

PayPay Product Security team is responsible for driving the application security and infrastructure security changes within the product division - the part of PayPay responsible for development and operations of the PayPay app. A strong candidate for the infrastructure security engineer position will be knowledgeable about modern infrastructure solutions (such as Kubernetes, various public clouds and their services, SQL and no-SQL databases, ElasticSearch, message brokers and so on), security challenges and threats relevant to them, and have experience in one of the following areas:

• Leading projects to improve infrastructure security at scale (e.g. introducing role-based access control, hardening K8s configurations, introducing temporary access credentials for database access, and so on)
• Introducing and improving security orchestration and automation, as well as solution to gather, store and analyze security events and assets

Primary Responsibilities

• Analyzing security risks relevant to the production infrastructure
• Designing security measures for the product infrastructure environment
• Implementing and running security solutions (SIEM, vulnerability management, network security, cloud security, container security, etc.)
• Improve security incident handling within product division
• Improving observability and monitoring for security information and events
• Assisting infrastructure teams in prioritizing security goals

Supporting Responsibilities

• Assisting infrastructure teams in implementing and running secure solutions
• Participating in major infrastructure projects as a security expert

Your qualification

• 2+ years of infrastructure security or relevant experience
• Solid understanding of security principles, protocols, and best practices
• Solid programming skills in one or more programming languages, such as Python, Golang
• Experience leading projects in any kind of security solutions, such as CNAPP, PAM, IDS/IPS, SIEM, SOAR, WAF, NGFW, etc
• Hands-on experience with cloud platforms, preferably AWS
• Hands-on Terraform experience. Experience with other IAC tools is also acceptable
• Hands-on Linux experience and comfortable with Linux commands
• Hands-on experience with CI/CD pipelines and tools like Github Action, Jenkins, ArgoCD, etc
• Knowledge of containerization technologies such as Docker and Kubernetes
• Strong teamwork skills and the ability to collaborate with others in a diverse environment
• Enjoy taking up a challenge and driving it to a conclusion

Preferred Qualifications

• Previous experience working in DevOps, SRE, or similar roles
• Experience working with microservice-based systems
• Experience working in a security position within the fintech industry
• Native or business level Japanese proficiency

What we offer

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

Additional details

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