Dmytro – React, Next.js, Typescript

An application for calculating and generating statistics about carbon emissions for different products and materials. The user buys slots where he can describe his product or material and then generate carbon emission reports for it by specifying the warehouse and other information about the product's route, weight, materials, etc. The user can also share the reports with other users, for example with the company that ordered the product.

• Led the development team
• Implemented the UI of the application based on Figma designs
• Designed the database schema and implemented integration with Supabase for storage and authentication
• Configured Stripe and implemented integration with SDK to support subscription model, dynamic pricing, and connected Webhook
• Incorporated carbon calculation formulas into the application to provide users with reports
• Developed PDF generation logic for carbon reports and branding
• Implemented email service to distribute carbon reports to users
• Configured deployment of the application to AWS, created CI/CD pipelines, configured domains

A service that allows you to improve the sales of your product or service with the help of AI.

• Migrated the app from Next.js 12 Pages Router to Next.js 14 App Router
• Refactored the whole application to use server components and to improve the pages loading speed
• Updated the theme configuration on the project to make the global UI changes easier and to make it easier to implement the dark theme later on
• Improved the UI & UX of the existing pages, such as pitch to person details page, contacts tables, home page, dashboard etc.
• Implemented integration with OpenAI API model to generate profile summaries and sales strategies
• Implemented initial RAG pipeline to store relevant embeddings for profiles
• Implemented the contacts lists upload from csv flow
• Worked closely with users/testers and CEO to understand the users' needs and implemented the required features in the app

A rental marketplace for neighbors to cooperate and lend/borrow resources. The platform aims to cultivate a culture of neighborhood collaboration, where lending and borrowing foster meaningful relationships and community solidarity.

• Implemented integration of WebSockets to support private messaging functionality via Socket.io
• Built a separate admin portal from scratch with the ability to manage application content
• Implemented efficient search functionality across the marketplace data with OpenSearch
• Implemented support for the location-based private neighborhood communities using MongoDB geospatial queries
• Enhanced performance of the marketplace by optimizing rendering of the content, utilizing caching, infinite pagination, and virtualized rendering
• Set up deployment of the marketplace to AWS and Vercel, configured development and production environments, and CI/CD pipelines

Patient Transport Management System, catering to the non-emergency medical transportation market. It connects hospitals, transport companies, and insurance providers, streamlining the process of requesting, dispatching, pricing, invoicing, and reporting on medical transports.

• Designed and built API of the core application features to provide smooth communication for web and mobile apps
• Implemented complex branching forms and filtering
• Created functionality for the interactive map feature using Mapbox SDK
• Covered core features with E2E tests using Cypress, configured CI/CD pipelines