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. If you are ready to boost your professional career in the tech world, this is your opportunity.

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'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.

You will dive into a dynamic environment, tackling short-cycle tasks across the core platform following a "you build it, you run it" philosophy. 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, participating in planning and reporting on progress. A Bachelor's degree in Computer Science or a related technical field. ~2-4 years of experience in a software engineering role. ~ Hands-on experience with Java or NodeJS. ~ A solid theoretical foundation in data structures, algorithms, and software design principles. ~ Excellent communication skills in English (written and spoken). ~ Proficiency with Linux, Git, Docker, and Docker-Compose. ~ Experience with testing tools and modern CI/CD frameworks.

Experience with Key-Value stores and in-memory databases (e.g. Redis, Memcached). Familiarity with cloud environments, particularly AWS. NodeJS, Java, Bash, Python Databases: MySQL Tools: Git, Jira, Notion NodeJS, Java, Bash, Python Databases: MySQL Cloud & DevOps: AWS, Jenkins, Docker Tools: Git, Jira, Notion Great work-life balance: work from home (2 days per week), versátil hours LinkedIn Learning and training opportunities com, and for a sneak peek of the cool stuff we build check this video out!

And, if you are ready to take your career to the next level and tackle engineering challenges at a global scale, we encourage you to apply! Please note that we do NOT provide VISA sponsorship. Candidates without a legal permit to work in Spain won't be considered. #

📌 Senior Software Engineer, Front End (Full or Part time) (Barcelona)
🏢 Smadex
📍 Barcelona