Igor Terentjev

Built core services with NestJS, Express, and Node.js; added request validation, structured logging, and error filtering to improve reliability; designed and implemented React dashboards using Redux Toolkit; created end-to-end data flows, optimized database schemas for MongoDB and PostgreSQL; deployed microservices to AWS ECS, set up token-based authentication, and implemented automated integration tests and CI.

Extended back-end services with Node.js/Express, added request validation and logging; migrated legacy endpoints to REST/GraphQL; built interactive front-end components in React; established test coverage with Jest and Cypress; collaborated with product and design to deliver features and deployed to AWS.

Developed Node.js services and data integrations, using MongoDB and PostgreSQL; built REST and GraphQL interfaces; improved reliability with centralized logging and monitoring; collaborated with QA and front-end teams to ship features.