Innovation Engineer

About Seedtag

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.

The Role

We are looking for an Innovation Engineer to join our Connected TV (CTV) squad within Seedtag. In this role, you will help build the next generation of smart TV advertising by exploring new technologies, prototyping innovative solutions, and delivering production-ready features. You will work in a fast-moving, startup-like environment within a global company, collaborating with developers and data scientists to improve audience understanding and ad targeting in a low-data CTV environment. This role combines technical expertise, creativity, and product thinking, giving you the opportunity to experiment with AI, large-scale data, and real-time systems while making a direct impact on the future of contextual advertising.

Your Challenge

• Research, prototype, and deploy innovative solutions to improve targeting and contextual understanding in CTV environments
• Experiment with AI, LLMs, and emerging technologies to accelerate product innovation
• Design and optimize workflows and pipelines to efficiently process large-scale datasets
• Collaborate with developers, senior engineers, and data scientists to define user stories and product direction
• Own solutions end-to-end, from idea and experimentation to production deployment
• Contribute to system architecture, performance optimization, and monitoring
• Explore new approaches to audience understanding and ad optimization in low-signal environments

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: Language: Python

What You’ll Need to Succeed

• Have a builder mindset and enjoy turning ideas into working prototypes and production-ready solutions
• Are comfortable working autonomously and navigating ambiguity in a fast-paced environment
• Bring strong software development skills (Python, Node.js/JavaScript, Go) and solid architectural understanding
• Are curious about AI, machine learning, and emerging technologies, and enjoy experimenting with new tools
• Have experience working with large-scale data workflows and high-throughput systems
• Communicate effectively and collaborate well with cross-functional teams
• Are product-oriented and motivated by delivering impactful, innovative solutions

Nice To Have

• Experience in contextual advertising or adtech
• Familiarity with real-time streaming, microservices, or distributed systems
• Hands-on experience with high-throughput data pipelines

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

Key skills/competency

• Innovation Engineer
• AI
• Machine Learning
• Python
• Large-scale data
• Connected TV (CTV)
• Ad-tech
• Prototyping
• System Architecture
• Problem-Solving