Senior Java Developer
This position is no longer accepting applications(closed Aug 16, 2026).
Senior Software Engineer (TopEase) Zagreb | Hybrid
F24 is Europe's leading crisis management SaaS platform, trusted by governments, airlines, banks, and Fortune 500s in over 100 countries. Alongside our crisis management technology, F24 also delivers Governance, Risk & Compliance software through our TopEase platform — helping enterprise customers model and manage processes, governance structures, and compliance requirements across complex organisations.
Why F24?
You'll be working on technology that genuinely matters.
TopEase has been in continuous development for over 30 years and is now entering a pivotal phase, with significant investment going into modernising legacy components, improving performance, and unlocking new features ahead of the upcoming TopEase 8.0 release. You'll join a specialised backend team responsible for the core engine that powers every application on the platform — working alongside highly tenured engineers, including architects with decades of domain knowledge, as well as more junior team members.
The work strikes a balance between maintaining a mature, complex system and modernising its architecture and dependencies — tackling technical debt, upgrading Java dependencies, and preparing the platform for future SaaS alignment, all while continuing to ship new features. This is an opportunity to:
✔️ Work on a GRC platform trusted by enterprise customers globally, as part of a SaaS provider serving 5,500+ organisations worldwide
✔️Help modernise a 30-year-old core engine — real architectural influence, not just feature delivery
✔️ Get hands-on with BPMN 2.0 functionality, REST APIs, and OAuth-based integrations
✔️ Contribute directly to the TopEase 8.0 release and beyond
✔️ Learn from tenured architects while helping shape the platform's technical direction
What You'll Bring:
✔️ Strong Java backend development experience
✔️ Comfort working with REST APIs, structured data formats (JSON/XML), and automated testing (JUnit)
✔️ Experience analysing, refactoring, and optimising legacy code
✔️ Exposure to system design and architecture — you've contributed to discussions on refactoring, performance optimisation, or reducing technical debt
✔️ A product mindset is a bonus — the ability to challenge requirements and propose improvements that add customer value
✔️ A collaborative approach and comfort working across engineering, product, and QA teams
Tech Stack: Java | REST APIs | JSON | JUnit | XML | XPath | BPMN 2.0 | OAuth | IntelliJ IDEA | YouTrack | Subversion (SVN)
About F24
F24 is Europe's leading provider of crisis management and emergency notification software. Trusted by more than 5,500 organisations globally, we're helping businesses protect their people, operations, and reputation when it matters most.
If you're looking for a role where you can make a genuine impact while helping shape a growing engineering organisation, we'd love to hear from you.
Salary is paying up to €50,000 (Gross) annually.
F24 is Europe's leading crisis management SaaS platform, trusted by governments, airlines, banks, and Fortune 500s in over 100 countries. Alongside our crisis management technology, F24 also delivers Governance, Risk & Compliance software through our TopEase platform — helping enterprise customers model and manage processes, governance structures, and compliance requirements across complex organisations.
Why F24?
You'll be working on technology that genuinely matters.
TopEase has been in continuous development for over 30 years and is now entering a pivotal phase, with significant investment going into modernising legacy components, improving performance, and unlocking new features ahead of the upcoming TopEase 8.0 release. You'll join a specialised backend team responsible for the core engine that powers every application on the platform — working alongside highly tenured engineers, including architects with decades of domain knowledge, as well as more junior team members.
The work strikes a balance between maintaining a mature, complex system and modernising its architecture and dependencies — tackling technical debt, upgrading Java dependencies, and preparing the platform for future SaaS alignment, all while continuing to ship new features. This is an opportunity to:
✔️ Work on a GRC platform trusted by enterprise customers globally, as part of a SaaS provider serving 5,500+ organisations worldwide
✔️Help modernise a 30-year-old core engine — real architectural influence, not just feature delivery
✔️ Get hands-on with BPMN 2.0 functionality, REST APIs, and OAuth-based integrations
✔️ Contribute directly to the TopEase 8.0 release and beyond
✔️ Learn from tenured architects while helping shape the platform's technical direction
What You'll Bring:
✔️ Strong Java backend development experience
✔️ Comfort working with REST APIs, structured data formats (JSON/XML), and automated testing (JUnit)
✔️ Experience analysing, refactoring, and optimising legacy code
✔️ Exposure to system design and architecture — you've contributed to discussions on refactoring, performance optimisation, or reducing technical debt
✔️ A product mindset is a bonus — the ability to challenge requirements and propose improvements that add customer value
✔️ A collaborative approach and comfort working across engineering, product, and QA teams
Tech Stack: Java | REST APIs | JSON | JUnit | XML | XPath | BPMN 2.0 | OAuth | IntelliJ IDEA | YouTrack | Subversion (SVN)
About F24
F24 is Europe's leading provider of crisis management and emergency notification software. Trusted by more than 5,500 organisations globally, we're helping businesses protect their people, operations, and reputation when it matters most.
If you're looking for a role where you can make a genuine impact while helping shape a growing engineering organisation, we'd love to hear from you.
Salary is paying up to €50,000 (Gross) annually.