Sales Internship

Sales Intern

Important eligibility requirement: To be considered for this internship, you must currently be enrolled in a university or higher education institution, or be eligible to complete an internship under an applicable university or graduate internship agreement in Spain. Please make sure you meet the necessary requirements to legally complete an internship before applying.

Refinery89 is looking for a commercially minded and proactive Sales Intern to support our growth across Spanish speaking markets.

This internship is ideal for someone who is curious about how businesses grow, enjoys working with clients, and wants hands on exposure to sales, business development, account management, and the AdTech industry.

You will work closely with our commercial and technical teams, gaining experience across the full publisher lifecycle, from identifying new opportunities and prospecting to onboarding, performance analysis, and relationship management.

Location: Madrid, Spain

Team: Publisher Success

Languages: Spanish and English

Employment Type: Internship

About Refinery89

Refinery89 is a Dutch AdTech company headquartered in Madrid, working with premium publishers worldwide to optimize programmatic advertising performance. Through advanced, data driven technology, Refinery89 helps publishers increase revenue, improve efficiency, and gain greater transparency across their monetization stack.

The company operates with an international, highly specialized team focused on delivering measurable results, operational excellence, and long term partnerships in an evolving digital advertising ecosystem.

What You'll Do

• Support business development activities across Spanish speaking markets by identifying new publisher opportunities, conducting market research, and assisting with outbound prospecting.

• Participate in calls and meetings with potential clients to understand their business needs and learn how to present Refinery89's solutions effectively.

• Support the sales process from initial outreach through follow up, negotiation, and closing.

• Help maintain and develop relationships with existing publishers, following up on performance and identifying potential opportunities for growth.

• Research publishers, competitors, market trends, monetization strategies, and new commercial opportunities.

• Keep CRM information accurate and up to date, manage follow ups, and contribute to maintaining a healthy commercial pipeline.

• Communicate with publishers through email, LinkedIn, online meetings, and calls while developing strong and professional long term relationships.

• Work closely with Technical Account Management, Development, Demand, and other internal teams to support publisher onboarding and ongoing account development.

• Analyze publisher performance, revenue data, and commercial metrics to identify opportunities for optimization and growth.

• Develop a strong understanding of digital publishing, programmatic advertising, publisher monetization, and the broader AdTech ecosystem.

Who We're Looking For

• Professional fluency in Spanish and English is required. You should feel comfortable communicating professionally in both languages, verbally and in writing.
• Strong interest in sales, business development, negotiation, and client relationship management.
• A commercial mindset and genuine curiosity about how businesses generate revenue, grow, and create value.
• Comfortable speaking with clients, asking questions, understanding their needs, and building professional relationships.
• Proactive and results oriented, with the ability to take initiative rather than wait for instructions.
• Strong analytical and problem solving abilities.
• Comfortable working with numbers, Excel or Google Sheets, and basic data analysis.
• Ability to interpret information and turn data into practical commercial insights.
• Excellent written and verbal communication skills.
• Confidence presenting ideas and communicating with different types of stakeholders.
• Strong organizational skills and the ability to manage multiple opportunities, tasks, and follow ups simultaneously.
• High ownership, attention to detail, and willingness to learn.
• Resilience and the ability to remain motivated when dealing with rejection or challenging commercial conversations.
• A collaborative mindset and strong work ethic.

Some Definite Pros That Will Make You Stand Out

• Previous internship, academic project, or experience related to sales, business development, account management, consulting, digital marketing, or analytics.
• Experience communicating with clients, prospects, or external stakeholders.
• Familiarity with CRM platforms or sales tools.
• Experience using Excel or Google Sheets for analysis.
• Knowledge of digital advertising, programmatic advertising, online publishing, or digital media.
• Previous exposure to outbound prospecting through email, LinkedIn, or cold calling.
• Knowledge of additional languages.
• Interest in technology, digital businesses, media, or advertising.

What You'll Learn

During the internship, you will gain hands on exposure to several areas of a commercial AdTech business, including:

• Business development and outbound sales
• Prospecting and lead qualification
• Client meetings and commercial negotiations
• Account management and relationship building
• Pipeline and CRM management
• Publisher monetization and programmatic advertising
• Revenue and performance analysis
• Cross functional collaboration between commercial and technical teams
• International business development across Spanish speaking markets

Interview Process

The interview process for this internship consists of three stages:

• Initial screening

  Introductory call with a recruiter.

• First interview

  Video call with members of the Publisher Success team.

• Final In-Person interview

  Meeting with the Hiring Manager and relevant team members.

Ready to start your commercial career and gain hands on experience in Business Development, Sales, and AdTech?