We’re looking for a Software Engineer to join our tech team and help build the future of neuro-contextual advertising at global scale.

Who We Are

At Seedtag, our mission is to transform advertising by proving that effectiveness and user privacy can truly coexist.

As the leading Neuro-Contextual Advertising Company, we combine Artificial Intelligence, Natural Language Processing, Computer Vision, and neuroscience to understand not only what content is about, but how it makes people feel and what they intend to do next.

Our proprietary AI, Liz, enables brands to connect with audiences across the open web and Connected TV without cookies or user tracking. Founded in 2014 by two ex-Googlers, Seedtag has grown to 700+ Seedtaggers in 17 countries, backed by €250M in funding, and operates today as a global ad-tech leader.

If you enjoy solving complex engineering challenges and building AI-driven systems at scale, you’ll feel right at home here.

Your Challenge

As a Software Engineer in the CTV team, you’ll help discover and build the next opportunities for Seedtag. Your role will be to explore problems, test ideas quickly, and turn promising concepts into working prototypes.

• Investigate problems and opportunities across technology, product, and business.

• Think beyond traditional development and find smart, creative solutions.

• Prototype ideas quickly to validate what could work.

• Experiment with different technologies, APIs, AI tools, or external partners.

• Transform early ideas into tangible solutions the team can build on.
  
  

Our Core Values

Outcome over Output
We measure success by impact and value, not by volume of features or lines of code.

Failure Is Allowed, Learning Is a Must
Experimentation is key to innovation. We test early, iterate often, and learn fast.

We Are All Scouts
We take ownership and leave things better than we found them.

We Are Data-Driven
Data informs our decisions and helps us continuously improve our systems and results.

Tech Stack

We operate at large scale, supporting up to 120k requests per second, with ML models responding in under 10 milliseconds and processing 20 TB of data daily.

Our stack includes:

• Languages: Python, Go, TypeScript, Scala
  
  

• Cloud & Infrastructure: Kubernetes, GCP, AWS
  
  

• Streaming: Kafka, Kinesis
  
  

• Data: Datalakes, GCS, Redis, Druid, MongoDB
  
  

• Architecture: 100+ microservices, DevOps-driven, continuous deployment
  
  

What You’ll Need to Succeed

• A strong problem-solving mindset and curiosity to explore the unknown.

• Ability to prototype fast and iterate quickly.

• Comfort working with different technologies, APIs, or tools to make things happen.

• Entrepreneurial attitude — you take initiative and move ideas forward.

• Ability to understand problems from both technical and business perspectives.

• Strong collaboration and communication skills.
  
  

Why Join Seedtag?

• A key moment of growth with real ownership and global impact.

• Flexible work model with 100% remote or hybrid options.
  (Remote contracts available in Spain, Italy, UK, Belgium, Netherlands, France, and Germany.)

• Continuous learning through a learning platform and optional language classes.

• A supportive, trust-based culture that values well-being.

• Team activities, offsites, and opportunities to connect beyond work.
  
  

Additional Perks

• Home office setup budget up to €1,000

• Paid trips to our HQ in Madrid

• MacBook Pro M3
  
  

Ready to Join the Seedtag Adventure?

At Seedtag, we create an environment where everyone can thrive. If you need accommodations during the hiring process, let us know and we’ll ensure a positive experience.

Send us your CV and let’s build the future of neuro-contextual advertising together.