The Trade Desk is a global technology company and the world’s leading independent platform for digital advertising, with nearly 4,000 employees across more than 30 offices. Our technology helps advertisers reach the right audiences across the open internet — from streaming TV and podcasts to mobile apps, news, and more.
Advertising powers the content people love. By making it more transparent, effective, and responsible, we help support trusted journalism, quality entertainment, and creators worldwide. The world’s brands and agencies rely on us to reach their customers and grow their businesses responsibly.
The scale of our platform brings unique technical challenges — from processing massive datasets in real time to building systems that operate reliably on a global scale. Our Software Engineers are end‑to‑end owners who have the opportunity to participate in many aspects of designing, building, and delivering data‑focused products for our stakeholders.
At The Trade Desk, we believe in building the back‑end infrastructure of our platform with a focus on quality at scale. This means whether we are building parts of our client‑facing applications, internal custom solutions for our own team members, or model pipelines for bidding optimization, we are making sure that we have infrastructure, development, and tools to do it right and efficiently.
Our system performs all day, every day serving general traffic. We build a distributed system in a highly collaborative environment, utilizing a broad range of technologies. Our back‑end developers work on finding solutions to algorithmic, optimization, and scale challenges in everything we do.
Develop with a variety of platforms and technologies, such Docker, Kubernetes, Gitlab, AWS, Azure, Aliyun, .NET Core, Java, Scala, SQL Server, GraphQL.




You will have the opportunity, depending on your interests and aptitude, to work on large‑scale distributed systems coordinating thousands of servers in cloud and physical data centers around the world, petabyte‑scale data challenges, machine learning, advanced visualizations, and interactive user interfaces – to name a few.
Commercial development skills in OO programming (C#, Java or C++) and design.
Cloud‑based platform experience (AWS, Azure or Aliyun).
Excellent understanding of Agile development methodology and development practices.
Experience in Agile Scrum tools (such as Jira)Understanding of designing web‑based, service‑oriented applications and integrated back‑office systems.
Experience in distributed source control system (such as Git)Key Attributes.
You have a sustained track record of making significant, self‑directed, and end‑to‑end contributions to large and impactful software projects.
You are a broadly skilled Technical Lead accustomed to developing web services.
Our senior engineers (Tech Leads) have deep knowledge and exercise a high degree of leadership in their daily work.
We are a global team from many diverse backgrounds, with different experiences and perspectives. To complement this team, you will welcome ideas that are different from your own and be skilled at finding and building from common ground.
All aspects of employment will be based on merit, competence, performance, and business needs. We do not discriminate on the basis of race, color, religion, marital status, age, national origin, ancestry, physical or mental disability, medical condition, pregnancy, genetic information, gender, sexual orientation, gender identity or expression, veteran status or any other status protected under federal, state, or local law.

📌 Staff Software Engineer (Madrid)
🏢 The Trade Desk
📍 Madrid