Smadex SLU

Cyber Security Engineer

Barcelona, Barcelona, Spain - Full Time

Smadex is a leading advertising technology company founded in Barcelona in 2010 and sold to American-based and stock-listed Entravision in 2018 (NYSE::EVC). We are one of the top mobile ad-tech companies in the world and the largest Demand Side Platform (DSP) based in Europe, with our revenues over +$100M and consistently growing +40% YoY over the past years. And with an incredible 100% growth last year.

We are looking for a proactive Cyber Security Engineer to join our team and safeguard the integrity of our high-traffic programmatic infrastructure. In this role, you will be the guardian of our digital ecosystem, bridging the gap between cutting-edge security engineering and agile DevOps practices. 

The Role

  • Architect and deploy scalable, cloud-native security protocols (e.g., WAF, Security Groups, GuardDuty, CSPM) to safeguard our high-traffic, API driven  infrastructure.
  • Design and maintain automated threat detection rules and response mechanisms for our cloud and container environments.
  • Manage continuous vulnerability assessments programs and coordinate third-party penetration testing to identify and remediate risks within our cloud-native and Linux environments.
  • Secure our software supply chain and third-party dependencies, with a strong focus on SDK security and data partner integrations critical to ad-tech.
  • Partner with engineering and DevOps teams to integrate secure system design, threat modeling and robust API security into the product lifecycle.
  • Lead incident response efforts and forensic investigations to mitigate the impact of security breaches and prevent future occurrences.
  • Ensure data privacy is a core component of our product architecture and data processing workflows, maintaining strict adherence to GDPR requirements.
  • Develop and maintain comprehensive security documentation, including policies, standards, and incident handling procedures.
  • Drive a "security-first" culture by creating awareness training, providing technical guidance to cross-functional teams, and offering a security perspective on ad fraud and invalid traffic (IVT).

Requirements

  • Experience: 4–5+ years of professional experience in Cybersecurity / Security Engineering 
  • Cloud & Systems: Proven expertise in securing cloud environments (AWS/GCP), Linux deployments, and containerized workloads.
  • API & Application Security: Deep understanding of API security principles and experience securing APIs in high-throughput environments.
  • Technical Tools: Hands-on proficiency with cloud-native security tools, SIEM platforms, and vulnerability scanners (e.g., Nessus, Qualys)..
  • Privacy & Compliance: Strong working knowledge of GDPR and its practical application in data-heavy, European-based environments.
  • Supply Chain Security: Experience managing vendor risk, third-party integrations, and dependency security.
  • Scripting: Strong ability to automate security workflows using Python, Bash, or similar languages.
  • Education: BA/BS degree in Computer Science, Information Security, or a related technical field.

Bonus points:

  • Ad-Tech Context: Familiarity with the programmatic advertising ecosystem (DSP, SSP, Ad Exchanges), SDK security, or invalid traffic (IVT) mitigation.
  • Advanced Principles: Deep understanding of threat modeling, and secure SDLC/DevSecOps practices.
  • Compliance Knowledge: Familiarity with planning or maintaining industry standards and certifications  such as ISO 27001, NIST, SOC2 or CCPA.
  • Mindset: A pragmatic, problem-solving mindset-finding the right balance between rapid velocity and strict security standards.

Please note that we do NOT provide VISA sponsorship. Candidates without a legal permit to work in Spain won't be considered.

What is in it for you:

  • Integrate a highly motivated, young and dynamic team
  • 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!

If you want to know more about us visit our website Smadex.com, and for a sneak peek of the cool stuff we build check this video out!

Apply: Cyber Security Engineer
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