Job Description
Application Engineer

Application Engineer

Belgium

 

 

 

 

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

 

Join the Worldline Test Competence Centre as an Application Engineer, where you'll play a crucial role in ensuring the performance and robustness of our electronic payment systems. You'll simulate thousands of transactions from Belgian cardholders across e-commerce and point-of-sale terminals, working with cutting-edge testing technology to maintain the highest quality standards for our global payment solutions.

 

 

Day-to-Day Responsibilities​

 

Your day-to-day responsibilities will include:

 

  • Execute performance and robustness non-regression test scenarios using advanced simulators and injectors
  • Monitor and administer Linux servers to ensure system reliability and availability
  • Collaborate closely with development teams to identify and resolve performance issues
  • Report on test results and ensure performance targets are met for each new release
  • Analyse system degradations with System Engineers, Database Administrators and Development Teams
  • Create and maintain scripts using bash, python and other programming languages
  • Provide technical expertise during high-pressure situations including incidents and releases

 

 

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:

 

• Higher education in information technology or 2-3 years of experience in software testing

• Proficiency in Unix/Linux operating systems and SQL databases (Oracle/PostgreSQL)

• Strong programming skills in languages such as Java (17+), C++, Python, or TypeScript

• Experience with Spring Boot framework and Git version control

• Excellent analytical and problem-solving abilities with outstanding attention to detail

• Fluent English communication skills (both written and spoken)

• Ability to work autonomously whilst collaborating effectively in team environments

• Knowledge of ISO 8583 standards would be advantageous

 

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.
  • At Worldline our top priority is to engage, encourage and develop you to help you improve your potential. In fact, we have comprehensive training and development programs in place demonstrating our dedication to developing your career.

 

 

Shape the evolution.

 

We are pushing towards the next frontiers of payments technology, and we look for big thinkers to join our journey. 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. And with our empowering culture, strong technology and extensive training opportunities, we help you accelerate your career. Wherever you decide to go. Join our global team of over 18,000 innovators across 40+ countries, and shape a tomorrow that is yours to own.

 

Learn more about life at Worldline at jobs.worldline.com

 

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.

Information at a Glance
Request ID:  302514
Posting Start Date:  4/24/26
Job Area:  Technology
Work Site:  Hybrid
Contract Type:  Permanent
Brand:  Worldline
Job Location:  Belgium - Brussels