We are looking for a Senior PHP Developer to take a key role in designing, developing and owning our system interfaces to external systems. You will work on a business-critical product used by thousands of hotels every day and play a central role in connecting our platform with external systems and partners.This role focuses on hands-on backend and interface development, API design and technical ownership of integrations in a fast-growing startup environment. You will act as the primary technical owner for interfaces and a key sparring partner within the engineering team and across departments.AufgabenYour responsibilities
Design, develop, maintain and document internal and external APIs and integrations using PHP and SymfonyTake technical ownership of our interfaces and ensure their reliability, scalability and maintainabilityIntegrate, monitor and maintain external systems and third-party APIs (e.g. PMS, booking systems, payment providers, partners)Define and improve interface architecture, standards and best practicesEnsure high software quality through testing, code reviews, maintenance and clean documentationSupport troubleshooting, error analysis and continuous improvement of integrationsCollaborate closely with Product, QA, Partner Management and other Engineering teams
QualifikationWhat you bring
Several years of professional experience as PHP Developer, ideally with a focus on integrations or APIsStrong expertise in PHP and relational databases (MySQL)Solid experience in designing and working with REST APIs, web services or similar interfacesExperience with GIT, Docker and CI/CDAbility to turn ideas into reliable, scalable and maintainable codeStructured, quality-focused and pragmatic working style
Required
Fluent German (spoken and written) – this is a mustProfessional working proficiency in English
Nice to have
Experience with SymfonyFamiliarity with A/B testing and data-driven product developmentSaaS or startup experienceUnderstanding of modern software architectures
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