F

freee.k.k. Tech Stack

Cloud accounting and HR software for Japanese SMBs

IT Services and IT Consulting 品川区, 東京都 1,001–5,000 employees Founded 2012 Public Company

Freee operates a multi-product SaaS platform (accounting, payroll, sales, tax filing) targeting small businesses in Japan, with an engineering-first hiring mix now scaling toward data infrastructure. The tech stack spans PostgreSQL, Rails, Go, and React on AWS/GCP, with active adoption of MuleSoft signaling API-led integration work — likely to unify data flows across disparate product lines. Active projects on LLM platforms, reconciliation automation, and common service architecture reveal a company moving from product-specific silos toward unified infrastructure.

Tech Stack 42 technologies

Core StackPostgreSQL Ruby on Rails Go React MySQL Redis Elasticsearch AWS Terraform Ruby Tableau Python TypeScript Kubeflow AWS RDS dbt WordPress Salesforce RAG BigQuery TiDB Spanner SQL GCP Looker Studio Devin Pub/Sub AWS EKS Dataform R+11 more

AdoptingMuleSoft

What freee.k.k. Is Building

◆Challenges

High-load infrastructure
Reducing technical debt
Multi-product integration
Manual data handling
Fast feature development
Performance improvement of financial statements
Speeding up unit tests
Improving labor productivity for small businesses
Data platform infra cost optimization
Scaling infrastructure for growth

▲Active Projects

Freee accounting
New product development
Freee service integration
Freee販売 feature development
Llm utilization platform development
Common services architecture design
Common foundation libraries development
Reconciliation automation platform
Freee申告
Freee顧問先管理

Hiring Activity

Accelerating110 roles · 55 in 30d

Department

Engineering

58

Marketing

11

Support

7

Data

6

Product

6

Finance

4

Sales

4

HR

3

Seniority

Senior

39

Mid

31

Manager

17

Lead

15

Director

1

Junior

1

Notable leadership hires: Service Development Lead, Tech Lead, Product Marketing Lead, full stack lead

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About freee.k.k.

Freee is a public Japanese SaaS company founded in 2012, operating as the market leader in cloud-based accounting and HR software for SMBs. The platform consists of several integrated products: Accounting Freee (invoicing, bookkeeping, financial reporting), HR Freee (payroll, employee management), Freee Sales, and Freee Tax Filing. The company serves as a back-office platform that automates repetitive tasks and integrates operational data across accounting, payroll, and sales functions. With 1,001–5,000 employees headquartered in Tokyo and hiring exclusively in Japan, Freee is in active growth mode — 106 open roles with 56 posted in the last 30 days.

Headquarters品川区, 東京都

Company Size1,001–5,000 employees

Founded2012

Hiring MarketsJapan

Frequently Asked Questions

What tech stack does Freee use?

Freee's primary stack includes PostgreSQL, Ruby on Rails, Go, React, MySQL, Redis, and Elasticsearch, deployed on AWS and GCP. Data infrastructure uses BigQuery, Dataform, dbt, and Looker Studio. The company is currently adopting MuleSoft for integration work.

What is Freee working on?

Active projects include LLM utilization platform development, reconciliation automation, common services architecture, and multi-product feature work (accounting, sales, tax filing). Internal focus spans reducing technical debt, optimizing infrastructure costs, and improving financial statement performance.