Yayoi Co., Ltd. Tech Stack

Back-office software suite for small business accounting, payroll, and CRM

Information Services 千代田区, 東京都 501–1,000 employees Founded 1978 Privately Held

Yayoi operates a 45-year-old back-office software business serving over 3.1 million small-business users across accounting, payroll, and transaction management. The company is actively modernizing: adopting Databricks, HubSpot, and Salesforce while migrating on-premise systems to cloud (AWS ECS, Lambda, RDS). Engineering-heavy hiring (74 of 132 active roles) focused on AI and cloud infrastructure, with active projects spanning cloud CRM, AI chatbots, and LLM-based development—indicating a shift from legacy SaaS maintenance toward AI-augmented products.

Tech Stack 105 technologies

Core StackJava Go MySQL Oracle AWS AWS Lambda AWS RDS Jenkins TypeScript Python GitHub Actions GitHub Slack Zoom SageMaker Databricks PyTorch Pandas NumPy scikit-learn TensorFlow Vertex AI Terraform Spring Boot AWS ECS Aurora Bedrock Jupyter Lab Amazon SageMaker Studio AWS Bedrock+74 more

AdoptingDatabricks HubSpot Salesforce Dynamics 365 Marketo Salesloft Gainsight GitHub Copilot+2 more

ReplacingAWS Avaya

What Yayoi Co., Ltd. Is Building

◆Challenges

Migrating on-premise systems to cloud
Modernizing legacy systems
Db migration
Data asset consolidation
Implementing cloud crm
Back-office efficiency
Technical debt reduction
Automating back-office tasks
Ensuring security governance
Compliance with privacy regulations

▲Active Projects

Cloud crm implementation project
Poc design and implementation for stakeholders
Contract management and sales billing system for new product launch
On-premise to cloud migration
Ai product poc
Initial service product development
Ai chatbot scenario design
Mock application with data integration and visualization
Ai-driven development
Llm-based advanced technology development

Hiring Activity

Steady130 roles · 55 in 30d

Department

Engineering

Data

Security

Marketing

Product

Support

Executive

Finance

Seniority

Senior

Mid

Lead

Manager

Notable leadership hires: Tech Lead, Tech Lead Engineer, Engineering Lead

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About Yayoi Co., Ltd.

Yayoi develops back-office software and business-support services for small enterprises in Japan. The Yayoi series comprises cloud and desktop applications for accounting, commerce, and payroll processing, plus advisory services covering startup formation and fundraising. Registered users exceed 3.1 million. The company is scaling cloud infrastructure on AWS (ECS, Lambda, RDS, Aurora) and building new CRM and AI-driven products, while addressing internal challenges around legacy-system modernization, data consolidation, and compliance governance. Hiring is concentrated in Japan across engineering and data disciplines.

Headquarters千代田区, 東京都

Company Size501–1,000 employees

Founded1978

Hiring MarketsJapan

Frequently Asked Questions

What tech stack does Yayoi use?

Java, Spring Boot, Go, MySQL, Oracle, AWS (ECS, Lambda, RDS, Aurora), Jenkins, TypeScript, Python, GitHub, and ML frameworks including TensorFlow, PyTorch, and Databricks. Adopting Salesforce, HubSpot, and GitHub Copilot.

How many users does Yayoi serve?

Over 3.1 million registered users of the Yayoi series (cloud and desktop products for accounting, payroll, and transaction management).