Senior Mobile + AI Engineer

We have a mobile application that is very close to release, but we currently have build issues and critical bugs that need to be resolved. The app combines GPS, GIS/maps, image processing, and AI analysis. We are looking for a senior hands-on engineer who can step into an existing codebase, quickly understand it, fix difficult problems, and help us get the application across the finish line. This is not a React Native-only role. What we need Strong real-world experience with: React Native / TypeScript Native iOS / Swift / Xcode Native Android / Kotlin / Android Studio Python, especially AI/image processing AI / LLM / computer vision GPS / GIS / mapping Mobile debugging and performance Production build and release processes iOS TestFlight You should be comfortable going below the React Native layer when necessary and debugging native iOS/Android issues directly. Initial $300 Milestone The first milestone is capped at $300 and is intended as a practical technical review and rescue phase. You will: Review the existing codebase and architecture Review the current developer's implementation Identify build blockers and critical bugs Fix the most important issues Verify GPS/GIS/image/AI functionality Produce a working Android build Produce a working iOS build Prepare/upload an iOS build to TestFlight, assuming required Apple access is available Give us a short technical assessment of the project and remaining risks We are not looking to rewrite the application. The goal is: Review → Diagnose → Fix → Build → TestFlight Mentoring / Technical Review This is important. We want someone who can work with our current developer, not simply replace them. You should be able to: Review their code Explain what is wrong and why Recommend better approaches Help them fix issues Review pull requests Mentor them on React Native/native development, debugging, and architecture You will also work directly with me to explain the technical situation and help make decisions about the remaining development. This is a hands-on senior/technical lead role, not a management position. How to Apply Please answer these briefly: 1. What is your real experience with Swift/iOS and Kotlin/Android? 2. Have you personally taken an app through TestFlight? What did you handle? 3. Give one example of a difficult mobile bug/build problem you personally solved. 4. What have you built with Python + AI/image processing? 5. What is your experience with GPS/GIS/maps? 6. Have you mentored or technically reviewed another developer's work? Please focus on what you personally built and fixed, not just a list of technologies. The initial milestone is capped at $300. Strong performance can lead to continued work on the project and a longer-term role with the team.