Starting date: July 2022

Duration: 6 months

Hours: Full time

Location: Madrid, Spain


Seedtag is the leading Contextual Advertising Platform. Our proprietary, machine learning-based technology provides human-like understanding of the content in the web, the highest level of brand safety in the industry and unmatched cookieless targeting capabilities.

We engage with the market on both demand and supply side to create, activate and launch high-quality advertising campaigns at scale. We are committed to creating a more beautiful, respectful and engaging way to do advertising.


2014 · Founded by two ex-Googlers

2018 · 16M total turnover & Internationalization & Getting growth

2021 · Fundraising round of 40M€ & +12 countries & +300 Seedtaggers


  • Accounts Payable: Analyze open payables and concilie them with the operations department
  • Accounts Receivable: Analyze debt aging by client & market and coordinate with the operations department to reduce the volume of debt
  • Financial accounting: provide support to the finance team in keeping P&L account and balance sheet up to date and other accounting tasks to ensure an accurate end-month financial closing


  • Are graduating or recently graduated in a relevant field, such as Business, Economics or Finance
  • Speak fluent Spanish and have a good level of English
  • Are proactive and eager to work in a young company with a real startup spirit
  • Have good communication skills and are not afraid to take risks
  • Are used to work with spreadsheets and excel

It would be a big plus if you

  • Have the possibility to do your traineeship under an internship contract/convenio from your university
  • Speak another language such as Italian or French
  • Have prior relevant experience in a similar company or sector


We are an AdTech family where innovative ideas and new ways to do things are welcome, we reject "that’s the way it’s always been done". In Seedtag you can find an energetic, fresh workplace, multicultural work environment where our members are from different countries from Europe, LATAM and so many more!, where you will have the chance to impact directly on the company results. Everyone is willing to help because we are all committed to a common objective, making Seedtag the best company in the world!

Seedtag DNA is unique from the very beginning, we celebrate and embrace diversity, also we want all our members (They, he or she) to feel like home, all of the human differences are welcome.


  • Real flexible work methodology. The option to work from home when you need to, also real flexible working hours
  • A great workplace location with food, snacks, great coffee and much more
  • Optional company-paid English and/or Spanish courses
  • Access to learning opportunities (learning & development budget)
  • We love what we do, but we also love having fun. We have many team activities you can join and enjoy with your colleagues!

Want to be a Seedtagger? Then send us your CV, we are waiting for it!