MIXI, Inc Tech Stack

Gaming, recruitment, and social platform operator with active M&A and international expansion

Software Development 渋谷区, 東京都 1,001–5,000 employees Founded 1997 Public Company

MIXI operates three distinct business lines — Monster Strike (mobile gaming), Find Job (recruitment platform), and legacy SNS — across 1,000+ employees and is actively scaling through M&A and overseas expansion. The tech stack reflects this breadth: Ruby + Go + Python + JavaScript for backend services, Swift + Kotlin for mobile, paired with AWS + GCP infrastructure and analytics tooling (BigQuery, GA4, Looker). Active hiring across engineering (28 roles), design, and product indicates heavy lifting on user acquisition in emerging markets (India, Southeast Asia) and technical integration of acquired properties.

Tech Stack 87 technologies

Core StackFigma Adobe Illustrator BigQuery Slack Jira Confluence Ruby Go AWS Terraform Ansible GitHub Actions Python JavaScript Swift Kotlin GitHub MySQL Photoshop Looker Studio Google Analytics 4 UserTesting Hotjar FullStory Notion ChatGPT Midjourney Adobe Firefly GCP Azure+57 more

AdoptingRuby on Rails AWS ECS

What MIXI, Inc Is Building

◆Challenges

Scaling engineering organization
Legal support need for overseas expansion
Organizational expansion
Acquiring users in india
Improving ad creative performance
Technical challenges across business units
Acquiring overseas users
Improving customer support quality
Reducing support team load
Solving operational issues

▲Active Projects

Monster strike
M&a support
New business development legal support
Face detection feature development for mite-ne
M&a it integration
M&a new subsidiary accounting scheme
Overseas subsidiary accounting
New user acquisition
Design system construction and operation
Tipstar recommendation system

Hiring Activity

Steady90 roles · 35 in 30d

Department

Engineering

Design

Finance

Marketing

Legal

Product

Data

Seniority

Senior

Mid

Manager

Junior

Lead

Director

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About MIXI, Inc

MIXI, founded in 1997 and publicly traded, pioneered internet-enabled recruitment in Japan with Find Job, then built a social network (mixi SNS), and expanded into mobile gaming with Monster Strike. The company now operates across three revenue streams: core gaming, recruitment services, and social/communication products. Engineering-led growth is supported by design and product teams building a design system and recommendation features (tipstar) for user engagement. Current strategic focus includes international user acquisition, M&A integration (legal and accounting support systems for overseas subsidiaries), and technical scaling across disparate business units.

Headquarters渋谷区, 東京都

Company Size1,001–5,000 employees

Founded1997

Hiring MarketsJapan

Frequently Asked Questions

What tech stack does MIXI use?

Backend: Ruby, Go, Python, JavaScript. Mobile: Swift, Kotlin. Infrastructure: AWS, GCP, Terraform, Ansible. Data/analytics: BigQuery, Google Analytics 4, Looker Studio. Adopting Ruby on Rails and AWS ECS.

What is MIXI working on?

Monster Strike optimization, M&A integration (IT systems and accounting), new business legal support, face detection for mite-ne app, design system, tipstar recommendation engine, and user acquisition in India and overseas markets.