Senior Java Engineer

Bucharest, Romania

 This is Worldline.

Worldline helps businesses of all shapes and sizes to accelerate their growth journey - quickly, simply, and securely. We are the innovators at the heart of the payments technology industry, shaping how the world pays and gets paid. Our technology powers the growth of millions of businesses across 5 continents. And just as we help our customers accelerate their business, we are committed to helping our people accelerate their careers. Together, we shape the evolution.

The Opportunity

If you are passionate about mentoring developers and shaping the future of technology, we want to hear from you!

The Core Foundation & Integration Tribe (CFI) implements and delivers the Issuing core applications, from Card Issuing lifecycle to Transactions clearing & settlement. With over 150 million cards and 1.16 billion monthly transactions, our platforms operate at the forefront of capacity and performance.

We are now seeking a Senior Java Engineer to drive our strategic product transformation and help us build scalable, secure and innovative solutions.

Day-to-Day Responsibilities​

• Architect and develop applications leveraging modern frameworks and cloud platforms.
• Define technological choices, best practices, and ensure secure, maintainable code.
• Conduct code reviews, oversee CI/CD processes, and support technical design decisions to deliver high-quality, scalable issuing payment solutions.
• Promote team skills development through training, knowledge sharing, and technical mentorship.
• Collaborate with internal teams to align on feature development and system improvements.
• Optimize performance, security, and cloud cost efficiency of applications.

Who Are We Looking For

We look for big thinkers. People who can drive positive change, step up and show what’s next – people with passion, can-do attitude and a hunger to learn and grow. In practice this means:

• Degree in scientific fields, 5+ years in IT and payments industry.
• Strong knowledge of the payment market, including credit card schemes (VISA, Mastercard), and credit card lifecycle.
• Expertise in requirement engineering, solution design, and analytical approach; Scrum experience is a plus.
• Technical proficiency in Java, Spring Boot, Angular, Kubernetes, REST, MySQL, PostgreSQL, CI/CD tools like GitLab CI.
• Ability to simplify complex concepts, foster team collaboration, and motivate across international environments.
• Demonstrated problem-solving skills, innovation focus, and leadership talent to guide development teams effectively and foster continuous improvement.
• Excellent written and spoken English (C1); additional languages (French, German, Italian) are appreciated.

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