Job Summary: We are seeking a Senior Mobile Software Engineer to develop, evolve, and maintain mission-critical mobile applications, contribute to architectural decisions, and collaborate with cross-functional teams. Key Highlights: 1. Development and evolution of mission-critical mobile applications 2. Architectural, performance, quality, and scalability decisions 3. Collaboration with Product, Design, Backend teams, and global stakeholders We are looking for a senior-level mobile development professional to work on the development, evolution, and maintenance of mission-critical mobile applications. This role involves making architectural, performance, quality, and scalability decisions, as well as closely collaborating with Product, Design, Backend teams, and global stakeholders. Requirements * Solid experience as a Senior Mobile Software Engineer or equivalent role * Strong experience in iOS (Swift) and/or Android (Kotlin) development * Experience with modern mobile application architectures (e.g., MVVM, Clean Architecture) * Experience integrating REST and/or GraphQL APIs * Knowledge of automated testing, mobile quality, and performance * Experience with CI/CD for mobile applications * Familiarity with publishing to App Store and Google Play * Knowledge of mobile security, monitoring, and observability * Ability to work autonomously and collaborate with cross-functional teams * Fluent English Job Type: Freelance / PJ, Intermittent (freelance) Compensation: R$2\.460,74 \- R$10\.150,45 per month Work Location: Remote