Slava – React, Next.js, Nest.js

Digital platform for managing hockey leagues, teams, games schedules, and player statistics. The system enables players and managers to track performance metrics, manage registrations, monitor standings, and access real-time updates through an intuitive web interface. The platform is built to handle growing data volumes and provide a smooth experience for both club administrators and players.

• Designed RESTful API architecture for leagues, teams, schedules, and statistics management with role-based access control
• Architected PostgreSQL schema optimized for complex statistical queries and real-time standings calculations
• Developed end-to-end features from database design through API implementation to responsive UI components
• Built interactive dashboards with dynamic data visualization for standings, player performance, and historical statistics

A comprehensive platform designed to streamline merchant application processes, centralize documentation and simplify onboarding management for businesses. It helps businesses manage and optimize multiple MIDs, route transactions based on different criteria, track transactions across all MIDs and get insights into success rates and ROI, and integrate with Shopify and key payment gateways for a smooth eCommerce experience.

• Built Shopify integration feature with the support to connect to Shopify, manage data, and inject scripts for streamlined functionality
• Developed and published a custom checkout page that redirects users from Shopify's cart to TagadaPay's payment page, enabling secure and efficient payment processing and tracking
• Refactored the critical modules of the web application to optimize performance by adjusting caching and improve maintainability
• Optimized database schema to improve the structure and efficiency of data retrieval and management and to support new integrations more smoothly
• Extended the platform's API to support new platform capabilities such as generic third-party integrations
• Actively participated in the architecture and design of schema structures for the project

A web application that facilitates the exchange of monetary gifts and the creation of personal gift registries. Users can seamlessly withdraw these gifts using an integrated mobile app, "Birdie: Cash Gifts," with the assistance of the Plaid payment system. With a Shopify extension for earning cashback rewards on purchases, users can conveniently withdraw the cashback via the "Birdie" mobile app.

• Implemented new features and designs for the web application with React and Next.js
• Built a specialized cashback widget tailored for Shopify storefronts
• Developed an intuitive admin dashboard with custom data visualization components
• Configured Sentry integration to enhance monitoring and error tracking across the web application
• Implemented dynamic styling mechanisms for the white-label version of the app

The product helps to build automated financial data processing pipelines through visual coding and generate visual reports for the team. Connectors allow integration of data sources like spreadsheets, bank accounts, and payment gateways.

• Built visual editor with advanced drag&drop features to create data processing flows using React Flow and React DnD
• Developed multiple nodes for the visual editor to connect third-party services, import data, filter, and export
• Implemented comprehensive backend business logic to manage data processing workflows
• Implemented multiple connector APIs to integrate data from platforms like Stripe and Shopify

Howdy is a set of tools for managing and scheduling Twitter and Instagram direct messages featuring a web platform and Chrome Extension. It is designed to make acquiring leads via DMs easy, quick, and scalable for modern social sellers.

• Implemented core functionality of the web application, such as authentication, Twitter and Instagram account linking, and a dashboard to manage DMs and see user engagement
• Discussed requirements with stakeholders, managed tasks for the development team, and conducted code review
• Migrated existing Chrome Extension from custom framework to React, enabling user onboarding and providing them with paid services
• Integrated a payment gateway using Stripe to support paid functionality on the platform
• Covered application with unit and E2E tests using Jest and Cypress to ensure the robustness of the platform’s critical flows and functionality