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MAINSYS Tech Stack

Banking software platform and digital transformation partner for retail and private banks

IT Services and IT Consulting Brussels 201–500 employees Founded 1995 Partnership

MAINSYS is a 25-year-old banking-focused software and services firm built around a Java/Spring stack (Jakarta EE, JPA, Spring Framework) with a modern front-end layer (Angular, TypeScript, Ionic, Cordova). The engineering-heavy hiring mix and active project slate—account management modernization, payments transformation, business rules migration—point to a company in the middle of a multi-year platform overhaul rather than maintenance mode. Pain points around consultant capacity and application incident handling suggest they're stretched scaling delivery alongside their own product roadmap.

Tech Stack 35 technologies

Core StackJava Spring Docker Maven Jenkins SQL Server PL/SQL JavaScript TypeScript Angular Node.js Kotlin Swift Jira SQL Jakarta EE JBoss EAP Git IntelliJ IDEA Nexus Spring Framework JPA RxJS Ionic Cordova Capacitor HTML CSS SCSS Visual Studio Code+5 more

What MAINSYS Is Building

◆Challenges

Reinforcing consultant teams
Migration of business rules
Handling application incidents
Strengthening frontline and quality management
Transforming payment processes
Modernizing account management systems

▲Active Projects

Reporting project
Migration of business rules
Payments transformation project
Account management system modernization

Hiring Activity

Steady15 roles · 4 in 30d

Department

Engineering

9

Support

3

Data

2

Seniority

Senior

6

Mid

5

Junior

3

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About MAINSYS

MAINSYS provides banking software and digital transformation consulting to retail and private banks across Europe. The company operates two parallel business lines: a consulting and systems-integration arm (partnering with Finastra, Avaloq, Wolters Kluwer, Sopra), and a proprietary platform called MAINSYS BANKING PLATFORM covering front-office (FRONTeO e-Banking, FRONTeO Branch, FRONTeO Open Banking aligned to PSD2), middle-office risk and regulatory, and back-office loan and savings functionality. The product is segmented by customer type (retail, private banking) and use case (daily banking, lending, savings). Headquartered in Brussels with a 201–500-person workforce, the firm operates as a partnership.

HeadquartersBrussels

Company Size201–500 employees

Founded1995

Hiring MarketsBelgium, Canada

Frequently Asked Questions

What is MAINSYS's tech stack?

Core backend: Java, Jakarta EE, Spring Framework, JPA, SQL Server, PL/SQL. Frontend: Angular, TypeScript, JavaScript, HTML, CSS. Mobile: Ionic, Cordova, Capacitor, Swift, Kotlin. DevOps: Docker, Git, Jenkins, Maven, Nexus. Tools: Jira, IntelliJ IDEA, Visual Studio Code.

What is MAINSYS working on?

Major initiatives include account management system modernization, payments transformation, business rules migration, and reporting project enhancements. The company is also addressing pain points around consultant capacity scaling and application incident management.