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Overview
Job details
Full-time hours
Per the ad.
Requirements
Have the right to work in Spain
Refinery89 doesn't mention sponsorship in the ad.
Work in English
English is required, per the ad.
Work on-site in Madrid
No relocation package mentioned.
University degree
“Currently enrolled in or recently graduated from a university degree related to Business Administration, Finance, Accounting, Economics, Management, or a similar field.” — per the ad.
Pay & benefits
What you'll get
• Hands on internship with internal training and mentorship.
• Practical experience in business administration and finance operations.
• Exposure to accounting processes across an international organization.
• A collaborative and international work environment.
• Flat organizational structure with a high degree of ownership and autonomy.
• Opportunity to understand how the operational side of a growing technology company works.
• Experience within the AdTech industry and a company serving publishers across Europe.
• A culture focused on transparency, continuous improvement, and operational excellence.
Requirements
What we're looking for
• Currently enrolled in or recently graduated from a university degree related to Business Administration, Finance, Accounting, Economics, Management, or a similar field.
• Comfortable working with spreadsheets, particularly Excel, and learning new software tools.
• Strong attention to detail and accuracy.
• Good organizational and time management skills.
• Excellent written communication in English.
• Excellent written communication in Spanish.
• Proactive attitude and willingness to learn.
Nice to have
• Interest in finance, business operations, technology, or fast growing companies.
• Previous exposure to accounting, administration, or finance through university coursework or projects.
No previous professional experience required. Full training will be provided internally.
The role
Business Administration Intern
We are looking for a Business Administration Intern to join our team and support the day to day administrative and financial operations of the business.
This is an entry level opportunity ideal for someone who is organized, detail oriented, comfortable working with numbers, and interested in developing practical experience in business administration within an international company.
You will work closely with our Finance team and gain hands on exposure to accounting processes, invoice management, reconciliations, expenses, and general business operations.
No previous work experience is required. Full training will be provided internally.
What you'll do
Record and process incoming invoices across the company's different entities.
Support Accounts Payable and other recurring finance administration activities.
Assist with bank and credit card reconciliations.
Process and review employee expenses according to company policies.
Maintain accurate administrative and financial records.
Organize and verify supporting documentation related to financial transactions.
Support recurring administrative and operational processes within the Finance team.
Assist with additional business administration and finance related tasks when required.
How you'll work
Location: Office based, Madrid
Schedule: Full time, 37.5 hours per week
Hiring process
If you are organized, detail oriented, eager to learn, and interested in gaining practical experience in business administration within an international technology company, we would love to hear from you.
About Refinery89
Refinery is a technology company that provides a platform for managing and optimizing digital advertising campaigns. The company's software helps brands and agencies automate, measure, and improve their performance across various digital channels, with a focus on data-driven decision-making and efficiency. Refinery operates globally, with a presence in the US and Europe, and serves a range of clients from direct advertisers to agencies.
In Spain, Refinery has established a growing office in Madrid, which serves as a hub for its Southern European operations. The company is known for a data-centric, performance-oriented culture, and its Spanish office actively hires international talent, particularly in technical roles like data science, product management, and software engineering. For international professionals, Refinery offers a dynamic, fast-paced environment where English is commonly used, making it an accessible entry point into the Spanish tech ecosystem.
- Founded
- 2015
- Employees
- 100–500
- Headquarters
- New York, USA
- In Spain
- Madrid
- Website
- refinery89.com
Good to know if you are moving
- Refinery's Madrid office is a key hub for its Southern European operations, offering a path for international hires to work in Spain.
- The company's work culture is described as data-driven and product-focused, which can be appealing for professionals with a technical background.
- As a US company with a Spanish office, Refinery offers an international environment where English is commonly spoken, easing the transition for non-Spanish speakers.
- The company has a relatively small, agile team, which can mean faster decision-making and more direct impact for new hires.
- Refinery's roles in Spain span product management, data science, and software engineering, indicating a demand for technical talent.
In their own words
About the company & team
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 enjoy learning, taking ownership, and contributing to the day to day operations of an international technology company.
Location
Refinery89 · Madrid
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