Job Description

Location: On site in Madrid

Schedule: Full time, 37.5 working hours per week

Working hours: Monday to Friday, 9:00 AM to 6:00 PM

Internship agreement: You must be eligible to sign a Convenio de Prácticas with your university or educational institution for the full duration of the internship.

Important eligibility requirements

Please apply only if you meet both requirements below:

• You can commit to working 37.5 hours per week, Monday to Friday, from 9:00 AM to 6:00 PM, on site at our Madrid office.
• You are eligible to sign a Convenio de Prácticas with your university or educational institution for the full duration of the internship.

Both requirements are mandatory. Candidates who cannot meet either one will not be considered.

About Refinery89

At Refinery89, we help digital publishers maximize their advertising revenue through advanced programmatic technology, data driven optimization, and strategic expertise.

Headquartered in Madrid, with a growing international team, we work with publishers across Europe and beyond to make digital advertising more transparent, efficient, and impactful.

As we continue to grow, we are looking for motivated people who thrive in dynamic environments, take ownership of their work, and want to develop their careers within an international company.

The Role

We are looking for an Accounting & Finance Intern (Prácticas) to join our Finance team and support the day to day accounting operations of the business.

This is a full time, on site internship at our Madrid office. The schedule is Monday to Friday, from 9:00 AM to 6:00 PM, for 37.5 working hours per week. You must be available for the full schedule throughout the internship.

You must also be eligible to sign a Convenio de Prácticas with your university or educational institution for the full duration of the internship. This is a mandatory requirement.

This entry level opportunity is designed for someone who wants to gain practical experience in Accounting and Finance. No previous professional experience is required. Full training and support will be provided internally.

You will gain hands on experience with accounts payable, reconciliations, expense processing, and recurring accounting activities across an international organization.

Responsibilities

1. Record and process incoming invoices in Accounts Payable across our different entities.
2. Support bank and credit card reconciliations.
3. Process employee expenses in accordance with company policies.
4. Maintain accurate financial records and supporting documentation.
5. Assist with recurring accounting activities and other Finance team tasks when needed.

Requirements

Mandatory

• Eligible to sign a Convenio de Prácticas with your university or educational institution for the full duration of the internship.
• Available to work 37.5 hours per week, Monday to Friday, from 9:00 AM to 6:00 PM.
• Available to work on site at our Madrid office throughout the internship.
• Comfortable working with spreadsheets, particularly Excel, and learning new software tools.
• Strong attention to detail and accuracy.
• Excellent written communication skills in English.
• Proactive, organized, and eager to learn.

Nice to Have

• Spanish or another European language.
• Academic background or interest in Finance, Accounting, Business Administration, Economics, or a related field.
• Interest in technology, digital advertising, or fast growing international businesses.

No previous work experience is required. Full training will be provided internally.

What We Offer

• A full time internship with hands on experience in a real Finance department.
• Full internal training and mentorship.
• Exposure to accounting operations across an international organization.
• A collaborative and international working environment.
• A flat organizational structure with a high degree of ownership and autonomy.
• The opportunity to contribute to a growing AdTech company working with publishers across Europe.
• A culture focused on transparency, continuous improvement, and operational excellence.

Interested?

Before applying, please make sure you can meet both mandatory requirements: commit to the full time, on site schedule of 37.5 hours per week, Monday to Friday, from 9:00 AM to 6:00 PM, and sign a Convenio de Prácticas with your university or educational institution for the full duration of the internship.

If you meet both requirements and are looking to gain real world experience in Accounting and Finance, we would love to hear from you.

Apply now and start building your Accounting and Finance career with Refinery89.