Vitaliy – React, Typescript, JavaScript

Unity is a decentralized telecom verification network that leverages a global fleet of mobile devices to generate cryptographically verifiable network performance proofs. The platform enables users to contribute real-time connectivity data in exchange for blockchain-based rewards, creating a transparent and decentralized map of global telecom performance. It combines a mobile node application with deep native hardware integration, a web-based management dashboard for real-time monitoring, and a Web3-enabled verification layer that anchors performance proofs on-chain.

• Led development of the mobile node application and web management dashboard
• Designed and optimized a high-performance backend architecture using Supabase to handle large-scale network telemetry ingestion
• Implemented complex SQL functions and Remote Procedure Calls (RPC) to efficiently process high-volume network performance data
• Managed real-time database subscriptions to enable live monitoring and dynamic updates
• Engineered custom Native Modules in Kotlin (Android) and Swift (iOS) to access low-level network and device metrics
• Built chat functionality and push notification systems to enhance user engagement
• Automated CI/CD workflows using EAS and GitHub Actions to streamline deployments and ensure release stability

Carelen is a comprehensive healthcare management platform designed to help professional caregivers and families coordinate complex patient care. The cross-platform mobile application centralizes medication schedules, biometric health tracking, and structured daily care plans within a secure, multi-role environment. The system supports real-time synchronization across multiple caregivers, integrates an AI-powered health assistant to help interpret patient data, and includes a high-performance PDF reporting engine for generating compliant medical documentation.

• Architected and developed the core backend using NestJS and GraphQL, designing scalable and secure cloud workflows
• Managed Azure infrastructure, implementing automated CI/CD pipelines to ensure stable and predictable releases
• Ensured HIPAA-compliant data handling, including secure storage, transmission, and access control mechanisms
• Engineered a high-performance PDF generation system using background workers to offload heavy processing and prevent UI degradation
• Implemented real-time notifications and synchronization across multiple caregiver roles
• Integrated biometric authentication to enhance application security
• Led integration of an AI health assistant to support caregivers in interpreting patient metrics and trends

A high-performance NFT aggregator platform built for web and mobile, designed to consolidate digital assets from multiple marketplaces into a unified interface. The product enables collectors and traders to explore, track, and manage their portfolios with real-time analytics and market insights. It integrates Web3 wallet authentication for secure on-chain access, interactive price visualization tools, and an advanced aggregation layer that allows users to list, sell, and fulfill orders across different marketplaces directly from a single application.

• Led development of the web and mobile applications, focusing on high-performance rendering and smooth UX under high-frequency market data loads
• Designed and implemented secure Web3 wallet authentication flows to enable seamless on-chain interactions
• Engineered the core NFT aggregation logic, integrating OpenSea.js to support cross-marketplace listing, selling, and order fulfillment
• Optimized real-time data handling to prevent performance degradation during complex Web3 transactions
• Implemented advanced list virtualization techniques to ensure smooth browsing of large NFT collections
• Integrated real-time analytical charts and price visualization tools to provide actionable market insights for traders and collectors

A sustainability-focused mobile application designed to help conscious consumers verify whether products and companies align with the United Nations Sustainable Development Goals (SDGs). By scanning product barcodes, the app retrieves real-time environmental impact data and corporate transparency metrics, enabling informed purchasing decisions. The platform combines a high-performance barcode scanning engine, a secure account system for personalized tracking, and a visually rich interface with fluid animations to deliver a seamless and premium user experience.

• Engineered a high-speed barcode detection and recognition system optimized for accuracy and low-latency scanning
• Integrated external sustainability and corporate transparency databases to deliver real-time product insights
• Designed and implemented fluid UI transitions and micro-interactions to enhance perceived performance and responsiveness
• Developed and maintained secure user authentication and account management workflows
• Optimized data flows and state management to ensure stability and high performance across the application

A digital platform that generates dynamic, QR-coded restaurant menus by synchronizing content directly from Google Sheets. The solution enables restaurant owners to manage and update their digital menus without technical expertise, reducing operational friction and eliminating the need for manual deployments. The system leverages automated data pipelines, static site generation, and continuous deployment to ensure that menu updates are reflected in real time. Key capabilities include an automated data bridge via Sheety, a mobile-responsive dining interface, and integrated Google Maps support to improve customer accessibility.

• Architected and implemented an automated CI/CD workflow that fetched real-time data from Google Sheets and triggered Static Site Generation (SSG) builds
• Designed a zero-friction content update process enabling non-technical restaurant owners to manage menus independently
• Integrated third-party services including Sheety and Google Maps directly into the build and deployment pipeline
• Automated production deployment to Netlify, ensuring reliable and consistent releases
• Optimized data synchronization and build performance to minimize latency between content updates and live availability

A social commerce platform designed to connect influencers and customers within a unified ecosystem. The product enables creators to showcase and sell merchandise through a dedicated, product-focused feed while allowing customers to discover, interact with, and purchase directly from their favorite influencers. The platform combines interactive engagement features with a streamlined discovery experience to facilitate seamless creator–buyer connections and drive conversion.

• Translated product and design requirements into scalable, production-ready features for both influencer and customer user flows
• Developed the product-centric post interface, enabling creators to showcase and manage merchandise effectively
• Implemented real-time comment and messaging systems to support direct creator–customer interaction
• Engineered a high-performance discovery feed optimized for fast loading and consistent content rendering
• Ensured stability and reliability across engagement and purchasing flows, maintaining a seamless and bug-free user experience

A social media platform dedicated to meme creation and discovery, built for digitally native audiences seeking fast, engaging, humor-driven content. The application combined an integrated meme editor with a dynamic social feed, enabling users to create, publish, and interact with visual content in a single ecosystem. Core functionality included content creation tools, public feed browsing, engagement features such as likes and comments, creator following, and trending content discovery — all designed to deliver a smooth, high-retention user experience under heavy media loads.

• Optimized application performance to deliver a smooth infinite-scroll experience despite high-resolution image traffic
• Led development of the built-in meme editor, enabling intuitive content creation directly within the app
• Engineered real-time engagement features including likes, comments, and creator interactions
• Implemented performance strategies for media-heavy feeds to prevent lag and ensure responsive UI behavior
• Maintained feed stability and rendering efficiency to support high user activity and continuous content updates