Kyash Tech Stack

Mobile-first banking and payments platform for Japan

Financial Services 港区, 東京都 51–200 employees Founded 2015 Privately Held

Kyash operates a full-stack mobile banking service built on Go, AWS, PostgreSQL, Redis, and Terraform—a modern backend stack suited to high-frequency payments. The project roster is heavily weighted toward compliance (AML monitoring, PCI DSS, transaction investigation, Visa acquirer integration) and payment reliability (processing logic, data matching, error reduction), reflecting both regulatory burden and operational maturity demands in Japanese fintech. Hiring has decelerated to 3 roles in the last 30 days across a 51–200-person org, with mid-level engineers and compliance specialists as the primary openings.

Tech Stack 33 technologies

Core StackSlack Zoom Zapier Go AWS PostgreSQL MySQL Redis Terraform GitHub CircleCI Docker Datadog PagerDuty Jira Tableau Ansible Google Ads Google Meet Google Calendar Gmail Google Sheets Google Docs Google Slides Microsoft 365 macOS Windows GCP Azure Apple Search Ads+3 more

What Kyash Is Building

◆Challenges

Strengthening compliance aml
Expanding prepaid payment services
Reducing payment processing errors
Improving payment data matching
Compliance with payment regulations
Optimizing data infrastructure
Developing data-driven culture
Increasing development speed
Internalizing marketing operations
Strengthening organization structure

▲Active Projects

Investigating suspicious transactions
Transaction monitoring
Mobile api server and microservices
Anti-social check and customer management
Microservices runtime environment
Ci/cd pipeline design
Pci dss compliance framework
Payment processing logic improvement
Visa acquirer integration
Cross-functional compliance improvement

Hiring Activity

Decelerating10 roles · 3 in 30d

Department

Engineering

Compliance

Data

Design

Generalaffairs

Legal

Marketing

Ops

Seniority

Mid

Junior

Manager

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About Kyash

Kyash is a Tokyo-based fintech company founded in 2015, offering mobile payment and banking services to consumers and a financial platform to businesses. The company operates in Japan's regulated financial services environment, building infrastructure for money exchange and payment processing. With a distributed backend (AWS, GCP, Azure) and API-driven architecture, Kyash serves both direct consumer adoption and B2B financial integrations. The org prioritizes compliance and payment system reliability alongside product velocity.

Headquarters港区, 東京都

Company Size51–200 employees

Founded2015

Hiring MarketsSouth Korea, Canada

Frequently Asked Questions

What tech stack does Kyash use?

Go, AWS, PostgreSQL, MySQL, Redis, Terraform, GitHub, CircleCI, Docker, Datadog, PagerDuty, and Tableau. Also uses GCP and Azure for additional cloud infrastructure.

What is Kyash working on?

Core projects include transaction monitoring and AML compliance frameworks, mobile API servers and microservices, payment processing logic, Visa acquirer integration, PCI DSS compliance, and CI/CD pipeline design.

Where is Kyash hiring?

Kyash has open roles in South Korea and Canada, with 12 active positions focused on engineering, compliance, data, and design across mid-level and junior seniority bands.