Web Developer Intern

Para una comprensión completa de esta posibilidad y de lo que se requerirá para ser un candidato exitoso, siga leyendo.

Location: Madrid, Spain, Onsite

Team: Publisher Success

Position Type: Internship

About Refinery89

Refinery89 is a Dutch AdTech company headquartered in Madrid, working with premium publishers around the world to optimize their programmatic advertising performance.

Through advanced technology, data, and hands on technical support, we help publishers increase advertising revenue, improve efficiency, and gain greater transparency across their monetization stack.

Our international team operates at the intersection of technology, digital advertising, data, and publisher operations.

About the Internship

We are looking for a Web Developer Intern to join our Publisher Success team in Madrid.

This internship is designed for a student, recent graduate, or early career candidate who already has a foundation in HTML, CSS, and JavaScript and wants to gain practical professional experience working with websites, technical troubleshooting, data,



and advertising technology.

You do not need previous AdTech experience. We will train you on the AdTech side from zero.

During the internship, you will work with real publisher websites, browser developer tools, HTML, CSS, JavaScript, advertising technologies, reporting platforms, and technical diagnostics while receiving support and guidance from experienced members of the team.

The internship is ideal for someone who wants to strengthen their web development fundamentals while gaining experience in technical troubleshooting, website integrations, data, publisher support, and Technical Account Management.

What You Will Do

Website Troubleshooting

• Support the investigation of technical issues affecting publisher websites.

• Use browser developer tools to inspect HTML, CSS, JavaScript, scripts, network activity, and browser errors.

• Help identify issues related to page structure,

📌 Web Developer (Madrid)
🏢 Refinery89
📍 Madrid