Refinery89 is looking for a passionate and experienced Senior Mobile Developer to join our fast-growing Mobile team. If you’re excited about building scalable SDKs, integrating cutting-edge monetization tools, and helping shape the future of mobile AdTech — we’d love to meet you.
What You’ll Do:
- Design, build, and maintain high-performance mobile SDKs for Android, iOS, and Unity environments.
- Lead the integration of mediation platforms like Google AdMob, IronSource, and others to ensure top-tier monetization performance.
- Work hands-on with Prebid Server to implement both client-side and server-side bidding solutions.
- Ensure SDK scalability, stability, and performance across platforms through rigorous testing and optimization.
- Collaborate closely with Product, AdOps, and Data teams to unlock revenue opportunities and fine-tune yield strategies.
- Contribute to internal documentation, code reviews, and the continuous improvement of development practices.
- Leverage GAM360 and other programmatic platforms to drive efficient ad delivery and revenue growth.
- Stay current with emerging mobile AdTech trends and propose solutions that keep our SDKs ahead of the curve.
Who We’re Looking For:
- Experienced Mobile Builder: 5+ years in mobile development with deep experience in Kotlin (Android), Swift (iOS), and Unity.
- AdTech Native: Strong understanding of ad mediation, monetization strategies, and RTB environments.
- SDK Specialist: Proven track record building and maintaining mobile SDKs at scale.
- Prebid & Mediation Know-How: Hands-on experience with Prebid Server, AdMob, and/or IronSource.
- Collaborative Developer: Comfortable working across teams and aligning technical solutions with business objectives.
- Detail-Oriented Engineer: Clean code, strong documentation habits, and scalable design thinking.
Nice-to-Haves:
- Experience with hybrid frameworks like React Native or Flutter.
- Familiarity with analytics tools (e.g., Firebase, AppsFlyer, Adjust).
- Exposure to CI/CD processes and mobile deployment pipelines.
- Contributions to open-source projects or developer communities.
What You Can Expect from Us:
- Competitive salary package based on experience and seniority.
- Remote-first role with flexibility — work from anywhere.
- Bonus structure tied to performance and impact.
- Ownership and autonomy in building key products used across mobile platforms.
- A feedback-driven, flat, and fast-paced team culture.
- 24 holidays per year, your own equipment, and Friday half-days.
- Annual team retreat and ongoing learning & development support.
Ready to build the future of mobile AdTech with us?
Apply today and help us shape the next generation of monetization technologies! 🚀
Spain
