Java Backend Developer for Banking API (m/f/d)

We love challenges. We love to build. We love to make things happen.
At JUSTROCKET, we're assembling the brightest minds to create exceptional teams and an ecosystem of like-minded and execution-oriented experts. Since 2016, we have been the heartbeat of the tech community in Cluj-Napoca.

About the project, we need power for:

In cooperation with one of our clients, a leading provider of open banking and open finance solutions we are seeking an ambitious Java Developer to join the Open Banking Development Team. They specialize in secure and efficient financial data aggregation and payment services, offering a platform that enables businesses to access and analyze account data, initiate payments on behalf of customers, and support financial institutions with a fully compliant banking interface. As a licensed and regulated provider, they help create innovative financial services that deliver real value to companies, banks, and individual users.

The team works on cutting-edge financial technology, developing a highly scalable and secure platform that facilitates real-time financial data exchange and payment processing. This is an opportunity to contribute to the future of digital finance, working with modern technologies to build seamless connectivity between businesses and the financial ecosystem.

Some more interesting project facts

💡 International / cross-border team working closely together.

💡 Small team: influence team culture and the product.

💡 Freedom to take responsibility.

💡 Extensive product roadma

Tasks

We are looking for a Java Developer who is an analytical thinker and enthusiastic about writing quality code and achieving high test coverage with a hands-on, solution-oriented mindset and a collaborative attitude. Your work will help make banking programmable, secure, reliable, and user-friendly.

Besides this, your activities will include:

⏩ Enhance our advanced Banking API by developing new features that drive innovation in the financial services sector.

⏩ Development of backend functionality to support user stories.
⏩ Writing and maintaining unit tests and optionally integration tests to ensure code reliability.
⏩ Regularly conducting code reviews to uphold code quality and best practices.
⏩ Ensuring the availability and functionality of backend services.
⏩ Taking responsibility for our monitoring & alerting stack to maintain service reliability.

⏩ Expand integrations with modern European bank APIs to improve coverage, performance, and security for a diverse range of customers.

⏩ Collaborate closely with Product Managers, Customer Support, and other teams to deliver exceptional value and outstanding user experiences.

Requirements

You shall bring:
✅ Experience or strong motivation to work with Java/Kotlin, Spring Boot, Hibernate
✅ Experience with MySQL/PostgreSQL, and Docker
✅ Solid understanding of REST services and tools like IntelliJ, JUnit
✅ Passion for writing clean, quality code with a focus on test coverage and performance
✅ Willingness to learn and pragmatic problem-solving skills
✅ Fluent in English

Nice to have:
✅ Previous experience in the financial services sector, ideally with PSD2 (XS2A) or FinTS/HBCI
✅ Experience with Kubernetes, Git, Maven/Gradle, and CI/CD tools like Jenkins
✅ Familiarity of OpenAPI, Liquibase, and AWS Cloud Services
✅ Comfortable with collaboration Tools like JIRA and Confluence
✅ Monitoring & Alerting, any tooling
✅ Any knowledge in AWS

The general tech stack of the project is:

🖥 Java, Kotlin

🖥 javascript

🖥 REST API's

🖥 SQL databases

Benefits

We provide:

💪 Assistance in setting up the project/integrating with the team

💪 Guidance while onboarding

💪 Support in any aspect of your activities

💪 Perks like private health insurance and 7card

💪 Regular team events like a week in a mountain hut

💪 Possibility to work remote (we will empower a flexible hybrid mode forever)

💪 Weekly Community Lunch

💪 Central working place in a big company house with lots of community space such as garden, BBQ area, and much more

💪 anything you are missing – let's talk!

Some final words...

You will be joining a dynamic and crossborder project team onsite in Cluj, working closely together with the tech lead and the development team.

If you have any further questions, feel free to contact us anytime!

Looking forward to meeting you for a (virtual) coffee or tea ☕️