• implemented a system of chart dashboards and a logic to export these dashboards as a PDF

• implemented changes to optimize the performance of the application - memoization, lazy loading, lazy rendering, which allow to render PDF documents with several hundreds of pages and thousands of references

• implemented an admin section to allow users to manage teams, users, email accounts, tolerances, data imports without the need to contact CS

• worked closely with product managers to improve user experience and design new features

• implemented the navigation between the areas in PDF document viewer and the form fields, which improved the end user experience

• implemented the UI of the analytical section with various types of charts, complex filters, which allowed the end user to have a better visibility

• implemented a UI to view and edit accruals data with complex logic to allow users to only make changes within a specified tolerance

• implemented an Activity Log section to log all the user corrections, re-assignments of the documents, errors for better debugging

• proposed and implemented various improvements to E2E tests, test data generation

• implemented an integration with Notion to display Notion pages in React app

• implemented a system of creating email templates using React

Main developer of the mobile app written in Ionic & Angular and an administration written in PHP & Nette.

I joined the project after the initial MVP phase. However, because of the poor initial implementation, I proposed few structural changes. We switched to NgRx state management, refactored most of the application & administration to remove duplicate code, define more reusable components & improve usability.

My contributions:

• proposed, designed and implemented a component-focused content management with drag & drop, which massively simplified the code base, improved the user experience for the content creators and allowed to have more flexibility and more interesting experience for the user

• implemented offline capabilities with auto synchronisation, when back online

• proposed, designed and implemented Redux like state management (with NgRx library)

• implemented in-app purchases for both iOS and Android

• refactored major parts of the system

I joined the team in the transforming phase. We were adopting new technologies (Graphql, CSS in JS), optimizing data queries, refactoring code, implementing new frontend and setting up processes in the team (CI & CD, Git flow, code reviews, SCRUM).

My contributions:

• delivered speed optimization of database queries, implemented lazy loading

• co-implemented GraphQL layer

• co-implemented internationalization

• reimplemented vehicle filters, unit tests

Tech stack: React, Mobx, MongoDB, Node.js, Graphql, Typescript, TypeORM, Jest, Cypress