Software Engineer (Backend)

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., * 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, participating in planning and reporting on progress.

• A Bachelor’s degree in Computer Science or a related technical field.
• 5+ 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.
• A genuine passion for technology and an eagerness to learn and grow professionally.
• 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.

What Will Make You Stand Out (Bonus Points):

• Experience with Key-Value stores and in-memory databases (e.g. Redis, Memcached).
• Familiarity with the ad-tech industry and cloud environments, particularly AWS.

Our Tech Stack

• Languages: Java, NodeJS, Bash, Python
• Databases: MySQL
• Cloud & DevOps: AWS, Jenkins, Docker
• Tools: Git, Jira, Notion

• Great compensation package
• Top location at the heart of Barcelona with a rooftop terrace, Barbecue, and a fully stocked fridge
• Great work-life balance: work from home (2 days per week), flexible hours
• Meal vouchers - Ticket Restaurant monthly allowance
• Monthly gym allowance: Choose between DiR and Wellhub
• LinkedIn Learning and training opportunities
• Monthly TGIF events
• Regular team-building events
• Fun and friendly work environment with talented marketers and engineers from over 40 countries
• And more!

Smadex is a performance advertising engine for mobile apps, enabling the world’s leading marketers to grow across Mobile and Connected TV (CTV). Powered by AI models trained on real campaign outcomes, Smadex delivers profitable growth at scale. Headquartered in Barcelona, with teams across the Americas, EMEA, and APAC, Smadex is a business unit of Entravision (NYSE: EVC).