Senior PHP Developer

Company Description DNX Network Sarl is one of the largest internet content distributors in Europe, serving a broad international customer base from its headquarters in Luxembourg. The company operates as a multiplatform content distributor across internet and mobile channels. It leverages multiple international payment solutions and advanced anti-fraud technologies to ensure secure and efficient transactions. DNX Network processes more than 250,000 transactions per month and supports over 15,000 active clients, offering a dynamic environment for technology professionals. Team members collaborate on scalable systems that directly support high-volume digital content distribution.

Role Description As a Senior PHP Developer at DNX Network Sarl, you will design, develop, and maintain high-performance back-end services and APIs that support large-scale content distribution and payment processing. You will work closely with cross-functional teams to translate business requirements into robust, secure, and scalable software solutions. Daily responsibilities include writing clean, testable PHP code, optimizing database queries, reviewing code from peers, and troubleshooting complex technical issues. You will also contribute to front-end integration, improve system architecture, and participate in continuous improvement of development practices. This is on-site role based in Luxembourg.

Qualifications

• Strong back-end web development skills, including PHP and related frameworks for building scalable services.
• Proficiency in object-oriented programming (OOP) principles and design patterns for maintainable, modular code.
• Experience with front-end development and integration (HTML, CSS, JavaScript) to support end-to-end web solutions.
• Solid software development and programming abilities, including debugging, testing, and version control (e.g., Git).
• Experience with relational databases (e.g., MySQL), performance optimization, and secure coding practices.
• Background working on high-traffic, transaction-heavy platforms, ideally with payment or anti-fraud systems.
• Ability to collaborate in a multidisciplinary team, communicate clearly, and mentor less-experienced developers.
• Bachelor’s degree in Computer Science, Engineering, or a related field, or equivalent practical experience.
• Comfort working on-site in Luxembourg; proficiency in English required.

At DNX Network, you will work in a dynamic and collaborative environment where ideas, ownership, and continuous improvement are encouraged.

We also offer:

• Meal vouchers to support your daily lunch expenses.
• Monthly team-building activities.
• A contribution toward gym and fitness membership costs.
• A well-connected office location with convenient access by public transportation and car.