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## Job details - Location: Ypenburg, Den Haag - Work mode: Onsite - Employment type: Full-time (Not an internship) - Salary: EUR 76,800 - 86,400 per year ## Role overview Online Payment Platform is hiring a Senior Backend Developer (PHP) in Ypenburg, Den Haag. This is an onsite, full-time position offering €76,800 - €86,400 per year. You will design and maintain high-availability systems that process millions of secure transactions globally, working on microservices architecture, database optimization, and backend reliability. ## Job details This Senior Backend Developer role is based onsite in Ypenburg, Den Haag. You will work on mission-critical payment infrastructure that cannot go down, collaborating with a team of over 30 experienced engineers. The position focuses on backend craft, including creating and optimizing microservices, improving database performance, and ensuring accuracy, security, and long-term reliability. Salary range is €76,800 - €86,400 annually.