Java Backend Developer

Job Description
Java Backend Developer

This is Worldline
We are the innovators at the heart of the payments technology industry, shaping how the world pays and gets paid. The solutions our people build today power the growth of millions of businesses tomorrow. From your local coffee shop to unicorns and international banks. From San Francisco to Auckland. We are in every corner of the world, in every part of commerce. 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 eager to take on exciting challenges and be part of a team that values creativity and technical excellence, this opportunity is perfect for 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 motivated back-end developper to support our strategic product transformation and help us build & maintain scalable, secure and innovative systems.

As Back-end developper, you will integrate into a diverse, agile, and collaborative cross-cultural team consisting of business analysts, tech leads, fellow developers, and testers. You will have the opportunity to work alongside experienced professionals and to contribute to ambitious projects that directly impact customers & business. You will be at the forefront of innovation, designing and developing robust, scalable applications.

Day-to-Day Responsibilities

• Design, develop, and maintain scalable, secure, and high-performance APIs and backend services for our customers.
• Collaborate with front-end teams, product managers, and stakeholders to understand requirements and implement the most suitable solutions.
• Participate in code reviews & JUnit testing to ensure code quality.
• Review existing codebases, identify vulnerabilities or inefficiencies, and develop enhancements to optimize performance and security.
• Contribute to technical documentation and follow best development practices.
• Cooperate with many development and testing teams from different departements

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:

• Bachelor's or Master's degree in Computer Science or related field.
• Proven experience in back-end development using languages like Java, Python, etc.
• Strong knowledge of relational databases (MySQL, PostgreSQL) and NoSQL databases (MongoDB, Redis).
• Experience with RESTful APIs and API security standards (OAuth2, JWT).
• Familiarity with CI/CD tools (Jenkins, GitLab CI), Docker, and Kubernetes.
• Analytical mindset, attention to detail, and team-oriented approach.
• Good communication skills in English; French proficiency is a plus.

Perks & Benefits
At Worldline you'll get the chance to be at the heart of the global payments technology industry and shape how the world pays and gets paid. On top of that, you will also:

• Be part of a company guided by a strong purpose to do good and recognized as top 1% of the most sustainable companies in all sectors worldwide.
• Work with inspiring colleagues and be empowered to learn, grow and accelerate your career.

Shape the evolution
We are on an exciting journey towards the next frontiers of payments technology, and we look for big thinkers, people with passion, can-do attitude and a hunger to learn and grow. Here you'll work with ambitious colleagues from around the world, take on unique challenges as a team, and make a real impact on the society. With an empowering culture, strong technology and extensive training opportunities, we help you accelerate your career - wherever you decide to go. Join our global team of 18,000 innovators and shape a tomorrow that is yours to own.

Learn more about life at Worldline at

We are proud to be an Equal Opportunity employer. We do not discriminate based upon race, religion, color, national origin, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as an individual with a disability, or any applicable legally protected characteristics.