I’m Roman Sahaidak, a full-stack engineer with 4 years of commercial experience building production products end to end—especially Flutter mobile apps, the Node.js/TypeScript services behind them, and the React dashboards that support operations and analytics. I like designing clean, maintainable systems using Clean Architecture, SOLID, and BLoC on mobile, while on the backend I work with PostgreSQL, Redis/BullMQ, and Kafka to build reliable async workflows. I’ve delivered work across regulated and transactional domains, including a HIPAA-enabled healthcare platform where I owned the Flutter client, payments, admin tooling, and CI/CD. I also build modern LLM-powered features (RAG, embeddings, and agentic workflows) and enjoy turning complex requirements into practical, shipping software—often collaborating closely with international stakeholders from planning through release.…I’m Roman Sahaidak, a full-stack engineer with 4 years of commercial experience building production products end to end—especially Flutter mobile apps, the Node.js/TypeScript services behind them, and the React dashboards that support operations and analytics. I like designing clean, maintainable systems using Clean Architecture, SOLID, and BLoC on mobile, while on the backend I work with PostgreSQL, Redis/BullMQ, and Kafka to build reliable async workflows. I’ve delivered work across regulated and transactional domains, including a HIPAA-enabled healthcare platform where I owned the Flutter client, payments, admin tooling, and CI/CD. I also build modern LLM-powered features (RAG, embeddings, and agentic workflows) and enjoy turning complex requirements into practical, shipping software—often collaborating closely with international stakeholders from planning through release.WWWW…