(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, an

📌 Auxiliar Administrativo (España)
🏢 InnoTaxes
📍 España