Claudia C.

I help startups, agencies, and product teams build, fix, modernize, and scale mobile and full-stack applications. I am a senior Mobile and Full-Stack Engineer with many years of experience turning ideas, existing codebases, and complex requirements into reliable production software. I work across the full product lifecycle: architecture, mobile development, backend APIs, database design, integrations, performance optimization, deployment, maintenance, and long-term product evolution. My main technologies are Flutter, React Native, React, Node.js, TypeScript, Firebase, Java, Go, and SQL databases. What makes me valuable is not only that I write code. I can understand the product, identify technical risks, make solid architecture decisions, and take ownership of the implementation from planning to release. I am especially useful when a project needs someone senior enough to move independently, communicate clearly, and solve problems without constant hand-holding. I can help you with: Cross-platform mobile apps with Flutter or React Native Web applications with React and TypeScript Backend development with Node.js, Java, Go, Firebase, and SQL databases API design, third-party integrations, authentication, notifications, payments, and cloud services Refactoring, debugging, performance improvements, and legacy modernization MVP development, product rescue, technical planning, and production releases If you need a developer who can take ownership, reduce technical uncertainty, and build software that is clean, maintainable, and ready for real users, I can help.