Auxiliar Administrativo - Internship

InnoTaxes; Comunidad de Madrid; Presencial; EUR 7800 - 10.000; A tiempo parcial

Ventajas ofrecidas por este puesto de trabajo

Mentorship & training

Continuous training

Team-building

Yearly trip

Restaurant card

Transport card

Descripción de la vacante

InnoTaxes is seeking an Administrative Assistant for an on-site internship in Madrid to support cross-border operations in a fast-paced international tax consultancy.

You will handle document management, client coordination, and accounting support using the a3 software, while ensuring accuracy and timely deadlines. Spanish (native) and English (B2) are required; prior consultancy exposure is a plus, with mentorship and growth opportunities.

Formación

• Native or C1-C2 level in Spanish and at least B2 in English.
• Familiarity with a3 management software.
• Degree in ADE, Finance or related field.

Responsabilidades

• Review, classify and archive invoices and tax documents for clients across markets.
• Coordinate with AMs, Management and Accounting; monitor deadlines.
• Perform bank reconciliations and support tax closings using a3 software.

Conocimientos

Spanish (Native/C1-C2)

English (B2)

Educación

ADE/Finance degree

Herramientas

a3 management software

Descripción del empleo

(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 global 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 creative activities.
• Our exciting Yearly Company Trip.
• Restaurant and transport benefit cards

Additional Information

• Working hours: 30 hours per week.
• Contract type: Internship with an educational stipend (Requires a study center agreement)
• Start date: TBD.