Mobile SDK Developer

**Who We Are** Kargo creates powerful moments of connection between brands and consumers to build businesses. Every day, our 600+ employees work to radically raise the bar on what agentic AI, CTV, eCommerce, social, and mobile can do to deliver unique ad experiences across the world’s most premium platforms. Taking a creative science approach to all we do, we continuously innovate solutions that outperform industry benchmarks and client expectations. Now 20+ years strong, Kargo has offices in NYC, Chicago, LA, Dallas, Sydney, Auckland, London and Waterford, Ireland. **Who We Hire** Techies who want to build the future. Creatives who want to design it better. Communicators to win business. Collaborators to build it. Data pros who turn numbers into insights. Product builders who turn ideas into innovations. Anyone eager to be on a team that doesn’t stop to ask what’s next, because they’re already building it. **Mission** This role exists to keep Kargo's in-app advertising reliable, performant, and revenue-ready across a fragmented ecosystem of devices, SDKs, mediation layers, and demand sources. It owns deep technical investigation across the full ad lifecycle — from bid response through rendering and measurement — and helps elevate in-app advertising into a first-class part of Kargo's platform. Without it, creative breaks silently across partners, integrations stall, and in-app revenue leaks through bugs no one can trace. **Outcomes — What Success Looks Like in 6–12 Months** - **Faster issue resolution:** Cut time-to-diagnosis for complex in-app failures spanning rendering, SDK behavior, mediation, and attribution, measurably reducing partner-facing escalations. - **SDK reliability gains:** Ship improvements to SDK and rendering infrastructure that improve render success rates and stability across iOS, Android, WebViews, and mediation partners. - **Performance improvements:** Deliver latency and efficiency optimizations across the ad stack with quantifiable gains in load time or resource use. - **New integrations evaluated and landed:** Partner with Business Development to assess and bring online [X] new vendor or demand integrations, with sound technical recommendations. - **Raised engineering quality:** Strengthen code review, testing standards, and AI-assisted workflows so production defects in the rendering path trend down quarter over quarter. **Skills — Core Technical Capabilities** Required - 5+ years of software engineering with significant exposure to mobile app advertising technologies. - Strong grasp of the mobile programmatic ecosystem — mediation, bidding, SDK integrations, OpenRTB, and ad rendering workflows. - Hands-on experience with mobile ad creative standards and cross-platform behavior across SDKs, WebViews, and mediation partners. - Proven ability to debug the full in-app stack, from creative delivery through rendering and attribution. - Performance engineering fundamentals: latency optimization, scalability, and system efficiency. - Fluency with real-device QA, inspection and proxy tooling, and production debugging techniques. Preferred - Working knowledge of the mobile privacy and measurement landscape and its impact on ad serving and attribution. - Bachelor's in Computer Science, Engineering, or a related technical discipline. **Competencies — Behaviors We Like to See** **Systematic Debugging** - Isolates root cause across SDK, mediation, creative, and demand boundaries instead of patching symptoms. - Reasons through ambiguous, multi-party failures where the break could live in anyone's code. **Engineering Craft** - Builds for reliability and scale, treating rendering correctness and performance as features, not afterthoughts. - Raises the bar through code review, testing discipline, and thoughtful use of AI-assisted workflows. **Partner-Facing Judgment** - Communicates technical findings clearly to Business Development, partners, and non-engineers. - Weighs integration opportunities on technical merit…