Kamil Toporek

Led end-to-end backend modernization of legacy health care engagement systems into scalable, cloud-native microservices. Migrated monolithic APIs to event-driven architectures using Kafka and RabbitMQ. Built real-time data ingestion pipelines from hospital systems and IoT devices and integrated with Electronic Health Records (HL7/FHIR). Designed internal REST APIs and external GraphQL, ensured HIPAA-compliant data handling, and advanced CI/CD and security practices. Mentored engineers and collaborated with clinicians and data scientists on AI-enabled features.

Developed a multi-tenant IoT SaaS platform enabling enterprises and municipalities to connect, monitor, and analyze real-time data from distributed devices (sensors, vehicles, industrial machines). Built a scalable React + TypeScript UI with real-time telemetry via WebSockets, implemented REST/GraphQL APIs using Node.js with PostgreSQL and MongoDB, and designed data pipelines with Redis caching. Implemented Docker-based CI/CD, Kubernetes deployment, and an API-driven architecture with OpenAPI/Swagger specs.

Built front-end React SPAs and back-end REST APIs backed by PostgreSQL, with proper data modeling, authentication, and role-based access. Created production-ready UI components and dashboards, ensured performance and accessibility, and supported daily standups and code reviews as part of a cross-functional team.