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 : Senior .Net Developer 

We are seeking a dedicated Senior .Net Developer to join our dynamic team across Belgium. This role requires a skilled technical professional with strong interpersonal skills, capable of providing exceptional customer service while working independently and collaboratively with local teams. 

Day-to-Day Responsibilities​ :

• Technical Contribution & Guidance: Contribute to complex technical implementations and guide junior team members, sharing knowledge and best practices while fostering a culture of continuous improvement and collaboration within the squad. 

• Architecture & Design Participation: Participate in architectural decisions for payment platform features as a team member, contribute to scalable .NET solution design, and provide input in technical strategy discussions while ensuring alignment with business goals and technical excellence. 

• Advanced Development: Develop robust, high-performance eCommerce payment solutions using .NET technologies, implementing complex integrations, and ensuring adherence to coding standards and security requirements. 

• Cross-functional Collaboration: Collaborate closely with Lead Developer, Product Managers, QA teams, and DevOps engineers to deliver innovative payment solutions while serving as a technical liaison across teams. 

• Quality Assurance & DevOps Integration: Champion quality practices, implement comprehensive testing strategies, and work with CI/CD pipelines (GitLab, Octopus Deploy) to ensure seamless deployment and monitoring. 

• Problem Solving & Innovation: Analyze complex technical challenges, provide innovative solutions, and drive process improvements to enhance development efficiency and product quality. 

• Documentation & Knowledge Sharing: Create technical documentation, participate in code reviews, and share knowledge through team sessions and collaborative discussions. 

• Production Support: Contribute to troubleshooting efforts for production issues, ensure system reliability, and implement monitoring solutions to prevent future incidents. 

Who Are We Looking For :

You are a seasoned software engineering professional with extensive experience in enterprise-level applications and a proven track record of technical contribution. You possess the following qualities and qualifications: 

• Technical Expertise: You have deep understanding of software development processes, architectural patterns, and modern development practices with extensive experience in complex system design and implementation : 10 years as .Net Deveveloper. 

• Team Contributor: You have successfully contributed to development teams and technical initiatives in fast-paced environments, with ability to inspire and influence others to achieve technical excellence. 

• Strategic Thinker: You possess strong analytical and problem-solving skills, allowing you to assess complex technical challenges and provide innovative solutions while considering long-term implications. 

• Effective Communicator: You excel in communicating complex technical concepts to diverse stakeholders, including executives, product managers, and technical teams, ensuring alignment and transparency. 

• Continuous Learner: You stay current with emerging technologies and industry best practices, actively seeking opportunities for professional growth and team development. 

• Quality Advocate: You champion quality practices throughout the organization, driving initiatives that elevate engineering standards and promote best practices across teams. 

• Customer-Centric Mindset: You understand the importance of delivering high-quality solutions that meet customer needs and drive business value in the payment industry. 

• You must be located in Belgium.

Must have : 

• Ownership & Technical Responsibility: Strong sense of ownership and technical responsibility for team's software with ability to take accountability for technical decisions and their outcomes. 

• Technical Excellence in .NET Core: Deep technical expertise in .NET Core and practices surrounding it, with ability to spread knowledge and best practices within the team. 

• Agile Experience: Basic understanding of SCRUM methodology and participation in backlog construction, refinement, and sprint planning to help estimate and plan work items effectively. 

• Standards & Guidelines Development: Experience contributing to the development of organizational policies, standards, and guidelines for software development across teams. 

• Complex System Design: Proven experience in software design in complex, high throughput, real-time, and zero-downtime contexts aligned with architectural guidelines and documented precisely. 

• Quality Assurance: Ensures team software respects functional and non-functional requirements (Security, Performance, Resilience, etc.) with comprehensive testing approaches. 

• DevOps Expertise: Advanced experience with DevOps tooling and practices including CI/CD pipelines, Git, 4-eyes principle, and canary releases for reliable software delivery. 

• Troubleshooting Excellence: Extensive experience troubleshooting complex systems in case of bugs, incidents, or test result failures with systematic problem-solving approach. 

• Architecture & APIs: Strong experience with SOA and API contract definitions, preferably in a microservices architecture context with understanding of distributed systems. 

• Testing Automation: Experience with testing techniques and automation such as BDD, TDD, enabling design of test cases covering complex or non-functional test scenarios. 

• Continuous Improvement: Strong continuous improvement mindset with focus on process optimization and team development. 

• Data-Driven Decisions: Experience making data-driven and fact-based technical decisions, ensuring their application within the team and sharing experience with peers in other teams. 

Nice to have 

• Database Technologies: Experience with SQL and NoSQL database systems such as MS SQL Server and Cassandra or equivalents. 

• Messaging Systems: Experience with queuing technologies such as RabbitMQ or equivalent messaging solutions. 

• CI/CD Tooling: Experience with GitLab, GitLab CI, and Octopus Deploy or equivalent CI/CD tooling and deployment automation. 

• Product Design Participation: Experience in participation of product design, from technicalities to functional alternatives and user experience considerations. 

• Innovation Projects: Experience in innovation projects or hack days within the team to drive technical advancement and team engagement. 

• Performance Optimization: Experience troubleshooting performance bottlenecks, providing solutions, and deriving best practices for system optimization. 

• Monitoring & Alerting: Experience with Kibana, Grafana, and PagerDuty or equivalent monitoring, logging, and alerting tools. 

• Infrastructure as Code: Experience with infrastructure as code platforms and managing assets such as VMs, Proxy, Load Balancer, etc. 

• ITIL Processes: Experience with basic ITIL processes such as Change, Incident, and Problem management for operational excellence. 

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 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. 

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