About Our ClientOur client is on a mission to simplify how developers interact with government services. Their goal is to make the exchange of electronic documents - such as e-invoices- fast, secure, and developer-friendly through powerful API solutions.Location: Remote from ItalyContract Type: Full-timeLanguage Requirements: Spanish (native or fluent), English (B2 level or higher)Your RoleAs a Senior Software Engineer, you will lead the development and deployment of core products for the Spanish market, ensuring they are scalable, compliant, and easy to integrate.You will:Architect, build, and document backend components and APIs.Ensure high performance, reliability, and maintainability of the systems.Collaborate directly with customers to support smooth and successful integrations.Recruit, mentor, and manage a junior/mid-level developer.What Our Client Is Looking ForStrong experience in developing web applications and backend services.Hands-on experience with scalable API projects.Solid understanding of Spanish and English (B2+).Experience working directly with clients or stakeholders.Familiarity with fiscal compliance, e-invoicing standards, or government APIs is a strong plus.Preferred Tech StackWhile diverse technical backgrounds are welcome, the following experience is especially valued:PHP (preferably with Symfony)PythonAWS or similar cloud platformsWhy This Role?Remote-first culture with flexible working hoursA key position in a fast-growing company with the opportunity to shape success in the German marketA collaborative, international team focused on solving real-world problems