Smadex, a Barcelona-based Demand Side Platform, is hiring a senior Creative Technologist (Playable Ads Developer) to build high-performing interactive and playable mobile and CTV ad experiences. Reporting to the Director of Creative Solutions, the role involves developing scalable ad templates, designing mobile-first UX for playable ads, optimizing for file size and platform constraints, defining QA processes, debugging SDK and ad delivery issues, automating tests, and collaborating cross-functionally with Creative Design, Ad Ops, and Product teams. Candidates must have 3-7+ years of experience in creative technology for mobile interactive ads, a strong portfolio of playable ads with positive KPI results, expertise in frontend technologies and mobile playable tools (e.g. Phaser, Unity), experience shipping creatives end-to-end, and client-facing commercial awareness. Good to have skills include 3D mobile web experiences, SIMID for CTV, mobile E2E testing, and programmatic ad serving knowledge. The position is full-time, hybrid (2 days remote), located in Barcelona, and requires legal work authorization in Spain. Benefits include private health insurance, LinkedIn Learning access, meal vouchers, gym allowance, team events, and a modern office with rooftop terrace.
What you'll do
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Build, architect, and extend high-performing playable ad experiences and interactive creatives for mobile and CTV platforms
Translate creative concepts including complex game mechanics into functional prototypes and scalable ad templates
Design mobile-first UX patterns specific to playable ads, including in-ad interaction logic, end-card flows, and call-to-action placement
Optimize playable ads for constraints such as file size budgets, load times, device/OS compatibility, and platform-specific compliance
Define comprehensive test matrices and QA checklists covering OS versions, device performance, cross-platform publisher environments, and connection conditions
Debug complex issues related to SDK integration, third-party trackers, ad delivery, and in-ad game logic
Introduce automation (test harnesses, validation scripts, pre-flight checks) to reduce production risk
Act as connective tissue between Creative Design, Software and Services, Ad Ops, and Product on playable and interactive ad initiatives
Define clear workflows and handoffs to reduce bottlenecks and accelerate time-to-launch
Support high-stakes client conversations with technical confidence regarding feasibility, timelines, QA expectations, and measurement plans
Partner with Product on tooling and capability gaps needed to scale playable ad output
Build and maintain a playable creative repository including winning game patterns, guidelines, specs, QA standards, learnings, and case studies
Share insights across teams through internal sessions, documentation, and repeatable templates
Requirements
3-7+ years in creative technology making interactive ads for mobile
Strong portfolio of playable ads delivering positive performance against advertiser KPI
Demonstrated expertise in frontend technologies and libraries for complex interactive experiences/game mechanics under tight constraints
Hands-on experience with mobile playable tools (e.g. Phaser/Pixie, Unity/Cocos export, Playable Factory or platform-specific tools)
Experience shipping and supporting creatives end-to-end (QA, troubleshooting, mobile ad delivery)
Ability to translate performance/measurement needs into clear event tracking and experimentable variants
Commercial awareness and client facing experience in the App AU ecosystem
Good to have: experience building 3D interactive experiences on mobile web
Good to have: experience building SIMID for CTV interactive
Good to have: proven cross-functional collaboration skills and comfort working in fast-paced environments
Good to have: deep experience with mobile E2E testing for ads (various device/OS combinations, ad verification, and publisher SDKs)
Good to have: familiarity with programmatic concepts and practicalities of ad serving & tracking in mobile in-app/playable workflows
Good to have: experience optimizing graphics performance and minimizing asset size for mobile web environments
Must have legal permit to work in Spain (no visa sponsorship)
Integrate a highly motivated and young teamGreat compensation packageTop location at the heart of Barcelona in a penthouse office with rooftop terrace, barbeque, and fully stocked fridgeWork from home 2 days/weekPrivate Health InsuranceAccess to LinkedIn LearningMeal vouchers - Tickets Restaurant monthly allowanceMonthly gym allowance: Choose between DiR Gym and WellhubRegular team-building eventsFun and friendly work environment with talented marketers and engineers from over 40+ countries
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