We are offering a Backend Engineer position to build the global contextual advertising leader.


Seedtag is the leading Contextual Advertising Platform. Our proprietary, machine learning-based technology provides a human-like understanding of the content on 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 sides 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

2021 · Fundraising round of 40M€ & +10 countries & +230 Seedtaggers

2022 · Fundraising round of 250M€ + expansion into the U.S market

2023 · Expansion into 15 countries + 500 Seedtaggers


  • Get inside AdTech problems and opportunities: from the discovery of the problem, proposal of solutions to the execution to the check of the final outcome
  • Startup mindset, try, fail fast, retry, success and get bigger
  • Think out of the box in order to address opportunities and solve real problems.
  • Think always at scale. What happens if the amount of registers in a PosgreSQL multiplies by 10? What happens if we have to manage x10 campaigns? How do we keep the response time under 10ms all the time
  • Rework the current architecture of some services to fit current / future needs
  • Write clean scalable code and test and deploy applications and systems
  • Be open to work in other programming languages or technologies of the squad


  • You are a problem solver, someone who is really interested into the context of the product in order to find opportunities
  • You are really proactive, demanding of the information you miss. You own the tasks you are into and you try to unlock the blockers you may have
  • You are really good at Python
  • DevOps mindset: The cloud is something you are usually involved and you like to handle kubernetes deployments or lambda functions
  • You are a team player and fun to work with
  • You have experience in AWS, GCP or Azure
  • You have worked into scale problems
  • You have a strong desire for self-improvement through side projects and sharing
  • You’re obsessed not only with technology but with crafting amazing technology to substantially impact the business


  • You have developed in GoLang
  • You have worked with Pandas or other Data tools
  • You have developed in Node.js


🚀 Key moment to join Seedtag in terms of growth and opportunities

💯 One Seedtag: Work for a month from any of our open offices with travel and stay paid.

🏠 Build your home office with a gross budget of up to 1K€ (external screen, chair, table...)

🇬🇧🇪🇸🇫🇷 Optional company-paid English, Spanish and/or French courses

📚 Odilo online school, where you can learn as much as you want

🍻 We love what we do, but we also love having fun. We have many team activities you can join and enjoy with your colleagues!


  • Growth: International, highly demanding work environment in one of the fastest growing AdTech companies in Europe. 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 in Europe, LATAM, the US and so many more!
  • Impact: The chance to have a direct impact, here you don't work for the sake of working, we all have an impact on Seedtag in our own way, rowing in the same direction
  • Diversity of methodology and people: Seedtag DNA is unique and highly appreciated by very different types of Seedtagers. We embrace diversity and encourage everyone to seek the best version of themselves and to show who they really are. With a totally flexible methodology
  • Flexibility: At Seedtag, we trust you, you can work from home, the beach or the office in our hybrid mode

Are you ready to join the Seedtag adventure? Then send us your CV!