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Cube System Inc (2335) Tech Stack

System integrator modernizing legacy enterprise infrastructure across finance, telecom, and manufacturing

Information Technology & Services Shinagawa, Tokyo 501–1,000 employees Founded 1972 Public Company

Cube System is a 50-year-old Tokyo-listed systems integrator handling large-scale infrastructure for Japanese enterprises. The stack reflects a legacy-heavy profile: Java, C, COBOL, Oracle, and SQL Server dominate, with cloud platforms (AWS, Azure, GCP) present but not dominant. Projects cluster around cloud lift migrations, core system overhauls to microservices, and database modernization—indicating a business model centered on helping mature financial, telecom, and manufacturing clients move away from on-premises monoliths. Senior engineers outnumber mid-level hires 3:1, suggesting replacement hiring and mentorship-intensive delivery rather than scaling new products.

Tech Stack 65 technologies

Core StackJava Python Linux Oracle PostgreSQL MySQL SQL Server PL/SQL PHP .NET C# ASP.NET AWS SAS Windows Server C VBA SQL Windows iOS Android COBOL Visual Basic Azure DB2 Microsoft Access Shell Script GCP UNIX VB.NET+35 more

What Cube System Inc (2335) Is Building

◆Challenges

Cloud lift migration
Consolidating project intake
Modernizing core system
Modernizing legacy systems
Improving system usability
Database high availability
Resource utilization offshore
System migration challenges
Increasing integration demand
Migrating to new version

▲Active Projects

Md system core development
Private cloud design and construction for financial institution
Investment management system
Employee insurance support system enhancement
Cloud lift migration for real estate
Cloud lift migration for food manufacturing
Hr system operation and maintenance
Core system overhaul with microservices
Core database maintenance for telecom carrier
Credit card transaction system testing

Hiring Activity

Accelerating70 roles · 35 in 30d

Department

Engineering

62

Ops

3

Support

3

Logistics

2

Seniority

Senior

49

Mid

16

Lead

5

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About Cube System Inc (2335)

Cube System provides system integration, outsourcing, and consulting services to mid-market and enterprise customers in Japan and Southeast Asia (offices in Osaka, Sapporo, Shanghai, Ho Chi Minh City). Founded in 1972 as an independent software company, the firm now focuses on three primary service areas: migrating legacy applications to cloud platforms, modernizing core banking and transaction systems into microservices architectures, and providing ongoing operation and maintenance contracts. Work spans financial services, telecommunications, manufacturing, real estate, and HR systems. The company operates with 501–1,000 employees and is publicly traded on the Tokyo Stock Exchange.

HeadquartersShinagawa, Tokyo

Company Size501–1,000 employees

Founded1972

Hiring MarketsJapan

Frequently Asked Questions

What tech stack does Cube System use?

Java, C, COBOL, Python, SQL, Oracle, PostgreSQL, MySQL, SQL Server, AWS, Azure, GCP, Linux, Windows, and .NET. The mix reflects legacy system expertise combined with modern cloud platform adoption.

What is Cube System working on?

Cloud lift migrations for financial institutions and manufacturers, core system overhauls to microservices, database modernization, and transaction system testing and maintenance for telecom and credit card processing clients.