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! 🚀