We’re looking for a Senior Backend Engineer to join our team and help shape the future of neuro-contextual advertising as we continue to expand globally.

Who We Are

At Seedtag, our goal is to lead the change in the advertising industry because we believe that effective advertising should not be at odds with users’ privacy.

By combining Natural Language Processing and Computer Vision our proprietary, Machine Learning-based technology provides a human-like understanding of the content of the web that finds the best context for each ad while providing unparalleled risk-mitigation capabilities that protect advertisers from showing their ads on pages that could be damaging for their brand. All of this, without relying on cookies or any other tracking mechanisms.

Every day, our teams develop new services that reach over 200 million users worldwide with fast response times to ensure that we deliver the best user experience. We’re fully committed to the DevOps culture, where we provide the platform that our Software Developers and Data Scientists use to manage over 100 different microservices, pushing dozens of changes to production every day. All of this is built on top of Kubernetes in Google Cloud Platform and Amazon Web Services.

If you are interested in joining one of the fastest-growing scale-ups in Europe and working on massive scalability challenges, this is the place for you.

The Role

As a Senior Backend Engineer in our multidisciplinary team, you will be crucial in building and maintaining backend systems.

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.

Implementation of scalable, efficient backend services in Typescript and Go, you'll ensure our systems meet the highest standards of performance and reliability.

Working closely with technical and business teams, you'll use your backend development skills to directly impact business results and improve operational efficiency.

Full development lifecycle of backend components, crucial for the success of our data-driven applications.

Your Challenge

Design and implement scalable microservices for contextual ad targeting and analysis.
Maintain 99.9% uptime for services processing 200M+ daily requests.
Build comprehensive test suites and monitoring dashboards.
Drive architectural decisions for the platform team.

Our core values

Outcome over output

Our core tech values reflect our commitment to delivering exceptional results, fostering a culture of continuous learning, and always putting the customer's needs first. We believe that success comes from focusing on the outcomes rather than just the output. Our tech team aims to solve problems that make a meaningful difference, and we measure our success by the impact we have on the customer.

Failure is allowed, learning is a must

We also recognize that failure is an inevitable part of the innovation process. Our team understands that setbacks are opportunities to learn and grow. We believe in testing early and often, and we continuously iterate and improve until we arrive at the best solution.

We are all scouts

Another core value we hold is that we are all scouts. We believe in leaving things better than we found them. This means we take ownership of our work and strive to improve the systems and processes we touch. We encourage our team members to be proactive in identifying areas for improvement, and we value those who take the initiative to implement positive changes. Our goal is to leave a lasting, positive impact on our projects and our team.

We are data-driven

Lastly, our team is data-driven. We believe that making informed decisions based on data is crucial to our success. Our team uses data to guide our decision-making process and to identify opportunities for improvement. We are committed to using data to continuously monitor and optimize our models and processes to ensure that we are delivering the best possible outcome for our customers.

Tech Stack

We have to support 120k requests per second running with ML models in production answering within 10 milliseconds! We have this running in production with Python and GoLang microservices using datalakes, GCS, Redis, Kinesis or Kafka. All this is constantly deployed in GCP using Kubernetes and other kinds of production stacks. The current stack outputs 20 TB of daily data having them ready to use for analytics and more with easy and low latency access.In the rest of the company, we also develop in Typescript for Nodejs and Scala making use of technologies like Kafka, Druid and MongoDB all over the Google Cloud Platform.

What You’ll Need to Succeed

5+ years of backend development experience.
Strong expertise in OOP languages.
Proven track record with clean architecture patterns (hexagonal, DDD, SOLID principles).
Deep experience with testing strategies (unit, integration, E2E).
Hands-on experience with observability tools (Prometheus, Grafana, distributed tracing).
Production experience with Docker and Kubernetes.
Experience with GCP/AWS services (Cloud Run, GKE, Pub/Sub, etc.).

Why Join Seedtag?

Growth & Opportunity: A key moment to join with vast career development prospects.

Flexibility: At Seedtag, we trust you to balance work and life effortlessly with the option to a 100% remote (Please note that while we operate as a 100% remote company, we can only extend contracts within Europe in countries where we have established legal entities: Spain, Italy, the UK, Belgium, the Netherlands, France, and Germany) or hybrid work setup, depending on what works best.

Learning & Development: Online courses in ODILO, and optional English or Spanish group classes.

Inclusive Culture: We foster a supportive environment that values personal growth.

Fun & Connection: Participate in team activities, company offsites, and more!

Additional Perks

Flexible benefits plan: Restaurant, transportation, and kindergarten vouchers.
Health insurance: Comprehensive coverage included.
Gympass: Access to wellness programs and fitness classes.
Seedsave Program: Exclusive discounts to help you save for the future.
Build your home office with a gross budget of up to 1K€ (external screen, chair, table...).
Paid travels to our HQ in Madrid to work p2p with your squad members.
Macbook Pro M3.

Ready to join the Seedtag adventure? Send us your CV and let’s grow together!

At Seedtag, we’re committed to creating an inclusive environment where everyone can thrive. We welcome diverse perspectives as they fuel our innovation and growth. Please let us know if you require accommodations during the hiring process and we’ll ensure a positive and accessible experience.

Seedtag

Sobre la empresa

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Senior Backend Engineer