Ivan Papushoi

A Ruby on Rails application is used to automate the manufacturing workflow. The application includes modules to work with the manufacturing process, support supplying materials, and work with employee resources.

Was the team lead and lead developer on integrating custom ERP solutions into the client's business. Have been planning and organizing the work of other team members, working with requirements, and writing many of the software's features.

Web application for managing loyalty programs, designed for use in different types of businesses. The app allows managing customers, applying bonuses and discounts, providing achievements, badges, and more. It calculates and delivers various statistics, sends emails, and offers many possibilities to customize rules.

The app has 11 years of development history and a vast codebase with complex business logic. I was part of a team of 3 members tasked with migrating this app from Rails 3.2 to Rails 5.2.

The client is an organization that provides a service that works as an API layer on top of the Cardano blockchain platform. The organization also offers open-source SDK libraries for over ten programming languages to provide functionality. I developed the Ruby module, well-covered by tests and documented, making it very fast and able to work with over 200 concurrent requests and fetch tens of thousands of records in one operation.

The service provides data for fundamental stock trading analysis, working as an API with the subscription-based business model. I developed the front-end side of the service, including authorization, payments, landing page, and more, using Nuxt.js based on Vue.js. In addition to delivering the API documentation module for the service, I customized an open-source Ruby and JavaScript documentation tool with additions for easy adding endpoint descriptions.