Backend Engineer, AdTech & Real-Time Ads

A leading software development company located in Madrid is seeking a Backend Engineer to design and scale high-performance systems for an Ads platform. The role requires 3-4 years of experience in software development, particularly with AdTech, and strong skills in Python, Kubernetes, and AWS. The position offers flexible work options and encourages professional growth through mentorship and collaborative projects., * Architect, build, and evolve core systems for the Ads platform.

• Design APIs and services supporting campaign management and reporting.
• Build and optimize high-throughput, low-latency systems.
• Own critical systems end-to-end, including deployment and monitoring.
• Drive architectural decisions for scalability and reliability.
• Collaborate with teams to translate business needs into solutions.
• Provide technical leadership and mentoring.
• Contribute to engineering best practices and documentation.
• Participate in hiring for the team.

• 3-4 years of software development experience building scalable systems.
• Experience with AdTech.
• Strong understanding of computer science fundamentals (algorithms, data structures, networking, databases).
• Proven experience designing and scaling distributed systems focusing on performance, observability, and fault tolerance.
• Experience with Python / Django, or other backend programming languages.
• Experience with Kubernetes, PostgreSQL, and AWS.
• Strong architectural instincts and ability to make high-impact technical decisions.
• Ability to mentor engineers and guide teams through ambiguity.
• Strong ownership mindset with ability to drive initiatives and deliver impact.
• Excellent communication and cross-functional collaboration skills.
• Comfort working in a fast-paced, high-autonomy, product-driven environment., Software development experience AdTech experience Computer science fundamentals Distributed systems design Python / Django Kubernetes PostgreSQL AWS Architectural instincts Mentoring skills Cross-functional collaboration Fast-paced environment adaptability

Competitive compensation: USD-based pay, education and fitness budgets Exciting projects: Work with Fortune 500 companies Flextime: Flexible schedule with remote and office options