Smadex is a cutting-edge ad-tech company: we process more than 4,5 million ad requests per second, replying under 100ms (for reference, the Google search engine handles ~76,000 QPS). Every day we generate several TBs of data that need to be processed, analyzed and aggregated, so our real-time components get smarter every day. We need you to help us keep our platform in motion If you are ready to boost your professional career in the tech world, this is your opportunity.
The team
You will join our core engineering team, a collaborative group of 8 experienced engineers responsible for maintaining and evolving the real-time bidding (Open-RTB) auction system that powers our entire business. We foster a fast-paced, supportive environment where knowledge sharing is key. We value autonomy and will provide the platform for you to grow your career while solving complex engineering challenges.
What are we looking for?
We're looking for a knowledgeable Software Engineer who is excited by complex technical challenges. Your success will be measured by your ability to deliver high-quality features,



collaborate with the team, while sharing and applying your knowledge effectively.
What will you do at Smadex?
You will dive into a dynamic environment, tackling short-cycle tasks across the core platform following a "you build it, you run it" philosophy. You will be expected to participate in code reviews, contribute to technical and architectural decisions, and collaborate in a fast-paced environment where every opinion counts.
Key Responsibilities
Feature Ownership: Design, develop, and implement new features for core products using NodeJS and Java.
Quality Assurance: Write clean, efficient, testable code and thoroughly test work locally and in a sophisticated staging environment.
Operational Excellence: Monitor deployments and help ensure the stability, reliability and performance of production systems.
Agile Collaboration: Collaborate with the team in an agile environment, particip

📌 Mid-Senior Software Engineer (Barcelona)
🏢 Smadex
📍 Barcelona