#164 【FinTech】Platform Engineer

※This job posting is for applicants residing in Japan.

Company Overview

They provide Revenue-Based Financing (RBF), a financing method in which future projected revenue is purchased as receivables.
Using proprietary algorithms to forecast future sales, they operate a platform that enables fast and easy fundraising without equity dilution or collateral.
They have established Japan’s first RBF fund and completed approximately JPY 1.4 billion in total funding (Series A), and continue to grow rapidly.

Their team consists of members with diverse global backgrounds, and Over 40% of their members are foreign nationals.

You will have the opportunity to work in a multinational team (Asia, Europe, Central America, etc.).
They also offer a full-flex time system, hybrid work (generally 1–2 days in the office per week depending on the role), and full remote options depending on conditions.

Job Description

The Platform Engineering team’s mission is to provide the foundation that enables product teams to release high-quality software safely and rapidly.

Platform Engineers go beyond building and operating infrastructure. You will own cross-functional responsibilities spanning test automation, CI/CD, and security design — fundamentally improving product quality and reliability. We are currently driving the infrastructure migration from AWS ECS to Kubernetes (EKS). You will also contribute to platform design with an eye toward future microservices adoption and architectural changes.

Key Roles and Responsibilities

Quality Engineering

Drive continuous improvement in product quality. Build and expand unit, integration, and E2E test coverage. Integrate quality gates (test coverage, static analysis, security scans) into the CI/CD pipeline. Sustain the high quality standards demanded of B2B fintech through scalable automation.

Infrastructure Security

Own security design and implementation at the infrastructure layer. This includes designing and reviewing IAM policies, establishing network security (VPC, security groups, WAF), and managing secrets. Build vulnerability assessment processes using security automation tools such as SAST/DAST (Snyk, Trivy, OWASP ZAP). Ensure compliance with financial services standards including OWASP Top 10.

Platform & Infrastructure

Manage and operate infrastructure using AWS (ECS, EKS, EC2, S3, RDS, etc.) and Infrastructure as Code (IaC) via Terraform. Build, maintain, and update Kubernetes clusters, driving platform design that supports future migration to a microservices architecture.

Site Reliability Engineering

Maintain the availability and reliability of production systems. Continuously observe system health through monitoring and alert design (e.g., Datadog), and own the establishment and operation of SLOs/SLAs.

Incident Management

Own troubleshooting of distributed systems and establish incident response workflows. Lead rapid root cause analysis and recovery during incidents, and drive the design and implementation of measures to prevent recurrence.

Development Environment

• Backend: Go, Python
• Frontend: React(Typescript), Material UI, Tailwind CSS
• Infra: AWS(ECS → EKS 移行予定,EC2,S3,RDS,DMS,QuickSight), IaC(Terraform)
• DWH: Snowflake
• Communication：Slack、Notion

Required Qualifications

• 4+ years of development experience in a professional setting, or experience as a development lead
• Experience building and operating Kubernetes (including EKS)
• Experience designing and implementing automated testing (unit tests, integration tests, or E2E tests)
• Experience building and operating CI/CD pipelines (GitHub Actions, CircleCI, etc.)
• Development skills in Infrastructure as Code (IaC) technologies (Terraform preferred)
• Experience in infrastructure security design (IAM, networking, secrets management, etc.)
• Practical experience with major cloud platforms, including AWS
• Japanese: N3 or higher
• English: Conversational level or higher (TOEIC score of 650 or higher as a guideline)
• Experience in at least one of the following
  • Backend: Go (other MVC framework development also acceptable)
  • Frontend: React (Vue, Angular also acceptable)
  • Data Pipeline: DWH (e.g., Snowflake)

Preferred Qualifications

• Experience developing FinTech or financial services infrastructure
• Experience with security automation tools such as SAST/DAST (Snyk, Trivy, OWASP ZAP, etc.)
• Experience designing and operating microservices architectures
• Experience designing monitoring using observability tools like Datadog
• Scrum development experience
• Experience designing and operating SLOs/SLAs
• End-to-end experience from requirements definition through quality standards establishment

Compensation & Benefits

Salary: Negotiable depending on experience and skills (includes 45 hours of fixed overtime per month)
　　　　Stock options are granted upon joining the company (depending on the individual's performance).
Bonus: None
Salary Increase: Once per year
Probation Period: 6 months
Location: Tokyo, Remote Work (2 days remote, 3 days in office per week)
Social Insurance: Fully covered
Working Hours: Super flex (no core time; 8 working hours + 1 hour break between 5:00–22:00)
Holidays: Weekends, public holidays, and New Year holidays (Dec 30 – Jan 3)
Average Overtime: 15 hours 
Smoking Policy: No smoking indoors

Selection Process

Selection process: 3 interviews + aptitude test + reference check
Aptitude test: This is a personality assessment. (Not SPI) It can also be taken in English.
Documents: Resume, CV
Interview Language: Japanese or English