A leading e-invoicing platform in Madrid is seeking a Staff Backend Product Engineer to own integrations end-to-end. In this role, you will design and build backend systems while mentoring others, engaging with customers, and supporting product decisions. Candidates should have over 10 years of backend experience, strong product judgment, and fluent English. This position offers a competitive salary between €90k and €140k plus stock options and the flexibility to work remotely with office attendance required a few days each month.
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