AdTech Software Engineer in Madrid or Remote


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Job Description

We are looking for a talented Software Engineer - Adserving to join our Engineering team and help us change the world of digital advertising together.


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€ & +10 countries & +230 Seedtaggers


  • work on the product core together with the product team to develop new functionalities.
  • develop new tools that help us to improve our development processes and make them open source when possible
  • you will help us to manage and scale our systems focusing on high availability, to be able to offer a robust service that can support millions of users worldwide


  • you have at least 3-5 years of experience working in software development
  • you have a degree in engineering or science or you have thoroughly studied the computational fundamentals independently
  • you have experience with one or more dynamic and static languages. Experience with NodeJS, Typescript and React is a plus
  • you have solid knowledge of object oriented programming and testing. Experience with functional programming is a plus


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.


Here at Adserving you’ll find a team that works and helps each other on challenging problems that require innovative solutions to create/deliver the most amazing ads on the planet. You’ll learn and help to improve our ads developing/serving/testing/monitoring tools and a lot of data based tools that we use on a daily basis. You’ll learn about reactive patterns, functional programming, key performance metrics optimization cycles and a lot of new skills that are interesting for any software developer. (Aitor Oses - Ads Chapter Tech Lead)


  • Real flexible work methodology. 100% Remote friendly.
  • 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)
  • Macbook pro M1 with external screen
  • We love what we do, but we also love having fun. We have many team activities you can join and enjoy with your colleagues!
  • Access to a flexible benefits plan (plan de retribución flexible) with restaurant, transportation and kindergarten tickets and discounts on medical insurance

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


About Seedtag

  • Marketing

  • Madrid, Spain

  • 50-200

  • 2014


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