Smadex is a cutting-edge ad-tech company: we process more than 4.5 million ad requests per second, replying in under 100ms. Every day, we generate several TBs of data that need to be processed, analyzed, and aggregated so that our real-time components get smarter every day.

We are looking for a QA Automation Engineer to help us scale our proprietary, Native Ad-Serving SDK (iOS & Android) from a successful prototype to a global commercial rollout. Your mission will be to ensure our rendering and tracking standards remain world-class as we integrate with a diverse range of global publishers. This role focuses on the final validation layer, ensuring our SDK delivers a flawless experience within any host application.

🚀 This is a full-time hybrid position in Barcelona.

The Opportunity

• Collaborate with developers and DevOps to define the "Release Ready" criteria for new versions of the native SDK.
• Build and maintain automated UI tests to ensure ad formats (banners, interstitials, video) render perfectly across all screen sizes and OS versions.
• Verify that the full "request-to-render-to-click" flow works as expected, ensuring 100% accuracy in our tracking and attribution signals.
• Manage and expand our internal testing apps to simulate different publisher environments and edge cases.
• Oversee the performance of our internal testing apps distributed at strategic locations worldwide to ensure consistency across different network conditions.

Requirements and Qualifications

• +4 years of experiences a QA Automation Engineer.
• Solid background in automated UI testing for native iOS and Android.
• Proficient in using proxy tools (Charles Proxy, Proxyman, or Fiddler) to intercept and validate network traffic and event firing.
• Experience with mobile CI/CD pipelines and distributing builds.
• A "pixel-perfect" mindset to catch rendering glitches or UI inconsistencies that could impact ad performance.
• Ability to identify which high-impact UI flows require automation versus manual exploratory testing.

Bonus Points

• Exposure to MRAID, VAST, or the OM SDK (Open Measurement).
• Experience testing libraries designed for third-party integration.
• Familiarity with measuring an SDK's impact on device memory or battery life.

What’s in it for you

• Integrate a highly motivated and young team
• Great compensation package
• Top location at the heart of Barcelona with a rooftop terrace, Barbeque, and a fully stocked fridge
• Great work-life balance: work from home (2 days per week), flexible hours
• LinkedIn Learning and training opportunities
• Meal vouchers - Ticket Restaurant monthly allowance
• Monthly gym allowance: Choose between DiR Gym and Wellhub
• 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!