Karen G.

I build and maintain production-grade mobile and full-stack applications, from the mobile client and backend to APIs, databases, real-time features, and AI-powered functionality. I've spent most of my career building complex applications for businesses and government organizations, including products where security, reliability, scalability, and maintainability matter. I can work independently and own the technical side of a product, or integrate into an existing engineering team. What I work with: ✅ Mobile: React Native/Expo, iOS, Android, Swift, Objective-C ✅ Web: React, TypeScript, JavaScript, WordPress, custom themes & plugins ✅ Desktop: Electron.js, Tauri ✅ Backend: Node.js, Express, Supabase, Firebase ✅ Databases: PostgreSQL, MongoDB, MySQL, SQLite ✅ Real-time: WebSockets, Supabase, Twilio, Sendbird ✅ AI: OpenAI API, LLM integrations, MCP, tools & agents ✅ Architecture: scalable APIs, authentication, data modeling, offline-first applications, real-time systems ✅ DevOps: CI/CD, automated builds and deployments I'm also an AI-assisted developer. I use tools such as Claude Code and Cursor extensively in my day-to-day development — for exploring unfamiliar codebases, implementing features, refactoring, debugging, writing tests, and automating repetitive work. AI doesn't replace my engineering judgment. I review and understand the code, make the architectural decisions, and take responsibility for what goes into production. I've built a wide range of applications, including enterprise software, business management systems, real-time communication apps, and other complex products. If you need someone who can go beyond implementing screens and take ownership of the product's technical implementation end-to-end, I'd be happy to discuss your project.