Lead Frontend developer

Implementation of Frontend of help system based on AI. During this project I deeply learned the structure of Angular Material

Implementing processing system for PCR laboratory. The system simplifies the process of processing PCR-samples. My main task was to migrate the app from angular.js/gulp to Angular

Development and support of a logistics product on AngularJS 1.7+ and Angular 8. Assembling releases, scheduling tasks with the team, discussing architectural solutions, code review, onboarding of new specialists. Some big tasks that I have completed: 1) Our application had to be localized. First we decided to use built-in Angular localization engine. But the problem was that it couldn't change localization seamlessly, without page reloading, so I decided to use ngx-translate npm packet. It was challenging because of tough migration. 2) When the app codebase started to grow rapidly I realized that the app should be splitted at many lazy loading modules, so I did it and this step increased the speed of the page loading significantly 3) I have implemented custom modules preloading strategy where I selectively loaded all important modules at startup 4) The next step for optimization was Server-Side-Rendering. It was really critical to us because internet was pretty slow in the region where people use our app. It was really really challenging because I had to refactor a lot of code to make it work properly with SSR 5) Created a part of our UI kit. Some components had to implement CONTROL_VALUE_ACCESSOR to work properly in template driven and reactive forms. 6) Started the migration of our AngularJS app to Angular 2+. I decided to use ng-metadata lib. 7) Setup 'sentry' package for errors logging

Development and support of a stack of donation collection applications for American companies such as PBS, ASPCA. The stack includes: an application for a call center written in flex (Action Script3), an online donation gift store written in angularjs, an Android application for volunteers to collect donations. Application APIs written in Coldfusion. The biggest contribution was made to writing the angularjs application, since its development began from scratch after I got there. At the moment, migration to Angular 2 is being prepared, and therefore the application is being rewritten using components (angular 1.5) Also I have written from the scratch the app for call center employees scheduling and time management. It was written within Angular 2. The app consist of the table with time slots. Employee selects time slots range and applies himself for the job for the selected period. One of the biggest challenge I met there is to match the selected range with the series of the most profitable shifts (profitability of the shift was the aggregation of 6 or 7 different parameters). This was the first time when I have created the app using redux-like state management system. It was NGRX.