(Internship | On-site | Madrid) We are looking for an Auxiliar Administrativo to help us grow our Innotaxes team in Spain. This is not just a role — it is a key opportunity to streamline our cross-border operations, directly impact efficiency, and grow within a fast-paced international tax consultancy environment. Key Responsibilities Document Management & Quality Control - Review, classify, and digitally archive invoices and formal tax documentation for clients across multiple general markets. - Ensure all client files are fully organized, accurate, and up to date - Act as a horizontal support pillar for our Account Managers (AMs), Management and Accounting - Monitor deadlines closely and send timely alerts International Client Relations - Proactively contact team members (covering EN, RU, JPN markets) to request and follow up on required paperwork. - Maintain an exceptional standard of client coordination to prevent communication bottlenecks. Accounting & Tax Support - Provide hands-on technical support by performing bank reconciliations before data is transferred to a3 software.



- Deliver logistical support during high-volume periods, such as quarterly and monthly tax presentation closings. Requirements Hard Skills - Native or C1-C2 Spanish level - Minimum B2 English level - Valuable prior knowledge or familiarity with a3 management software. - Degree in ADE, Finance, or related Experience - Minimum of 6 months to 1 year of prior experience working in a consultancy, tax advisory, or fast-paced corporate administrative environment. Soft Skills - Exceptional attention to detail and methodical organization. - Strong time management abilities and capacity to handle multiple priorities. - Assertive communication and great adaptability to learn new processes. What We Offer - Hands-on mentorship and training in real-world accounting and advanced tax management tools (a3). - Continuous training and mentorship from an international team. - Team-building, wellness, and crea

📌 Auxiliar Administrativo (Madrid)
🏢 InnoTaxes
📍 Madrid