David Todor

Architected and built an eCommerce platform from scratch across frontend and distributed backend services. Implemented a microservices backend with Nest.js, REST/GraphQL APIs, and database caching, plus an asynchronous order-processing pipeline using RabbitMQ, Kafka, BullMQ, and background workers. Delivered AI-powered automation tools and LLM-based internal features, and owned cloud-native operations including AWS infrastructure, CI/CD, and observability with Prometheus, Grafana, and OpenTelemetry.

Developed healthcare platform features across React/Next.js frontend and secure backend services. Implemented healthcare APIs for patient and operational workflows with role-based access, and added AI automation components for document classification and key-information extraction. Built Python data-processing scripts to clean and transform healthcare data, while improving UI performance and reliability through optimized queries, validation, and error handling.

Contributed to digital banking and fintech features with a frontend-heavy focus, building responsive React/TypeScript interfaces and improving user workflows for account and transaction screens. Developed backend integration layers using Node.js and Python to connect UI flows with enterprise services and authentication-related APIs. Participated in Web3 research/prototyping work involving Ethers.js, Ethereum wallet connectivity, and smart-contract interaction patterns.

Started a software engineering career delivering frontend and backend features for enterprise and eCommerce applications. Worked with PHP and JavaScript/TypeScript frameworks (including React and Vue.js), building modules and admin/customer-facing pages while supporting the full development lifecycle. Supported AWS-based deployments and worked with relational data and application logic using MySQL.