Developed a platform to facilitate the booking and management of COVID-19 tests.

Developed a project to help construction companies manage certifications:
- Transformed the application into a Single Page App using Vue.js and Rails API.

Connects Real estate agents with buyers.
- Developed latest version of Rails API, with database with 1M+ records.
- Improved API response speed by adding efficient serializers, improved db structure.

Helps medical facilities to manage patient and employee info.
- Developed Rails API with multitenant database architecture.
- Complex employee permission system.
- Background processing for payments and notifications.
- First version of project's mobile Web-App is also built by me with ReactJS.

Developed a feature-rich, highly customized Rails-based CRM for a chain of local co-working spaces:
- Implemented a custom Bootstrap theme for a tailored user experience.
- Built a sophisticated employee management system to handle complex workflows.
- Integrated tools for detailed progress analysis and performance tracking.

Refactored a large, legacy codebase. Within a few months, our team achieved the following:
- Transformed the architecture into a modular, maintainable structure.
- Thoroughly documented and tested the code to ensure long-term stability and ease of future development.

Personal Startup. Restaurant search / online ordering website.

Website / Windows Phone App. Helps users to find / clean and monitor garbage cleaning.