Developed Frontend part using React/Redux/TS stack. Worked in the logistics department on several projects. The most outstanding project are:Blanco - a system for warehouses to manage and inspect warehouse equipment* Successfully completed the development phase on schedule for a warehouse management system, implementing over 20 new features using React, Redux and JavaScript, improving inventory control and equipment failures treatment, and providing vendor users with access to the system* Gradually refactored the system, improving stability and maintainability by integrating ESLint, Prettier, SonarQube, which sped up code reviews by ensuring consistent code quality and structure.* Implemented unit tests using Jest and React testing library to overcome 80% threshold, which reduced the number of frontend bugs and reduced the duration of regression testing by an average of 3 days* Eliminated XSS vulnerabilities across the application by conducting a thorough security audit, sanitizing user inputs, and implementing content security policies (CSP), resulting in a more secure codebase.Trunk Line - a system to plan and operate truck routes between warehouses and depots* Built a fully functional route management system using a React, Redux and TypeScript stack, including route planning and real-time tracking* Built a modular component system on top of Material UI, reducing the code duplication from ~14% to 2.3% according to SonarQube, which also made it easier to reuse components within different repositories* Optimized interactive table: reduced initialization time from 14s to ~0.7s and increased fps meter from 10-15 to 60 on low/mid-end devices, which was highly appreciated by business users* Set up a CI/CD pipeline using Jenkins, Docker and JFrog Artifactory deployment to ensure faster and more stable releases

* Continuously refactored and optimized the cryptocurrency exchange platform and accompanying apps (UI library, admin panels, landings, payment forms).* Developed front-end for 10+ websites and SPA's using HTML, CSS, JS, and various JS/TS tools and technologies like React, Next.js, etc.* Improved Lighthouse performance score from 43 to 91 by optimizing CSS/JS bundle sizes, components lazy-loading, deferring non-essential scripts, and implementing efficient image loading techniques.

Developed several unusual SPA's using React stack:* An app to select multiple brick types and visualize a resulting brick wall using canvas and CSS 3D transitions* An app to visualize and calculate the cost of installing the floor covering depending on different variables (room size, floor type, etc.)

* Developed and supported a large-scale MRM app for a bank's marketing department built on React/Redux/TS stack from scratch.* Worked with Backend-For-Frontend layer built on Node.js.