Konstantin Pejic

• Worked on a big data analytics dashboard platform that visualizes and analyzes large amounts of Big data in a short time using Express.js and Vue.js • Integrated Elasticsearch with the existing MySQL for better database handling and performant querying • Developed micro-service based health care service center backend based on Node.js, Kafka, AWS • Migrated from Redux state management system to the combination of Apollo & React context API

• Constructed a REST and Socket API in Node.js (using the Express.js framework and Socket.IO library) • Built an eCommerce back-end using NestJS, integrated PostgreSQL and used TypeORM • Developed an analysis feature and provided various results visualized via React, D3 and Highcharts libraries • Implemented a responsive React website from scratch for a social media startup • Built a React web app using hooks, Redux, best practices

• Ensure applications security and ability to interact with multiple APIs and databases • Design and create a knowledge management platform on a knowledge graph, utilizing a range of technologies, including Node.js, Typescript, React, and Mobx • Develop 2+ full-stack web applications to analyze and process data for different clients • Optimize company’s complaint handling process by creating and delivering highly efficient app-based solutions

• Played a key role in the development, improvement, and operation of web-based software • Developed full-stack applications across various platforms using latest industry-adopted technologies and frameworks • Conducted unit and load testing for high profile customer facing applications, which reduced system failure rate by 70% • Gained hands-on expertise in Bootstrap, Foundation, Express and similar back-end Node.js as well as front-end presentation frameworks web application frameworks