Plamen Tyanev

- Created a responsive image gallery by combining proprietary React elements with React libraries, allowing customers to navigate product images and zoom in on details. - Applied compression, lazy loading, and image optimizations to reduce client load and render times, improving Lighthouse performance score from 52 to 98. - Constructed a form wizard component with individual step validation and state management using Formik and Yup - Built a back end GraphQL API to handle all CRUD operations using Node.js

As Team Lead and Senior Full Stack Engineer, I led the strategy, planning, and execution for our Web Tools application platform. - Streamlined client state management by matching the format of back end GraphQL requests with Apollo Link State. - Built a back end GraphQL API to handle all CRUD operations using Node.js and Prisma. - Led all Front-end web development for managing clients and access control using React, Apollo, and GraphQL. - Responsible for developing the UI pages using Angular 2/4, HTML5, CSS3

- Developed reusable framework components utilized in 300+ other components across the application. - Implemented unit testing, that grew to 1700+ tests, for greater code confidence with Jest and React Testing Library. - Maintained and updated custom YAML content parser as headless CMS to convert and render data from YAML files into designated React components, enabling straightforward workflow for non-technical staff to create and edit content.

Full stack web developer responsible for developing backend logic and designing responsive frontend for a scalable Node.js web application. - Designed data structures with non-relational databases (Cloudant). - Built custom UI and its components with HTML5, CSS3, jQuery, and Javascript. - Experience in creating web services and using them by RESTful API calls on server side. - Used botkit.ai for creating chat bots for popular channels like Facebook, Slack and integrating them with the application.