andriihapon

Multi-chain ICO launchpad with KYC verification, whitelisting, staking mechanisms, and tier-based participation across Ethereum, Polygon, BSC, Solana, and Sui ecosystems. Designed and developed the frontend user interface from scratch, translating Figma designs into a responsive, intuitive, and visually appealing platform; Integrated headless Payload CMS to provide flexibility to the customization of the interface for each pre-sale launch; Integrated the frontend with blockchain networks, enabling secure interactions for token purchases, staking, and tier-based access; Configured and connected cloud-based services to support scalable platform operations and real-time user data processing; Implemented KYC verification workflows, ensuring compliance and a frictionless onboarding experience for users; Optimized platform performance through iterative refactoring, resolving bugs to enhance reliability and user satisfaction.

Decentralized finance platform supporting token swaps, liquidity provisioning, and staking pools, providing users with secure, transparent, and non-custodial access to blockchain-based financial services. Integrated new swapping, staking, and liquidity pools with blockchain smart contracts using Web3, enabling seamless on-chain interactions; Implemented wallet connectivity and transaction flows, ensuring secure interaction with blockchain networks and real-time transaction status handling; Developed reusable DeFi UI components for asset management, pool participation, and staking operations, improving consistency across the platform; Built responsive and dynamic user interfaces based on Figma designs, ensuring visual consistency and optimal usability across devices; Collaborated with backend and blockchain teams to align frontend functionality with smart contract logic and protocol requirements; Performed continuous bug fixing, code refactoring, and optimization to maintain performance, scalability, and code quality.

Internal CRM and media-planning platform for advertising agencies, managing campaign scheduling, billing operations, financial reporting, and role-based access across multiple business teams. The system supports campaign planning, invoicing, reconciliation, and operational workflows for sales, planning, and finance departments. Designing and implementing the front-end architecture from scratch to provide scalable and maintainable solutions for the application. Implemented Clean Architecture layout with strict dependencies rules; Implementing intuitive and optimized user interfaces based on Figma designs, following best practices for better user experience; Implemented authentication flows (login, email confirmation, resetting password) and role-based authorization; Integrated API for documents and invoices preview and sending them to DocuSign; Developed reusable business-oriented UI components and form workflows to support complex data-entry and validation scenarios; Optimized the platform performance via resources caching and optimistic UI updates in order to support faster interactions with spreadsheet-like data editing; Configured Claude Code and established an AI-assisted development workflow for feature planning, implementation, performance optimization, and security reviews.

Modular API-first commerce platform for building scalable B2B and B2C e-commerce solutions with flexible integrations, workflows, and multi-channel support. The platform enables businesses to create customized shopping experiences, integrate external services, and manage complex commerce operations across multiple markets and customer touchpoints. Developed a reusable component library using Storybook and Vue.js, ensuring consistency, accessibility, and scalability across customer-facing interfaces; Participated in design system evolution, creating reusable UI patterns and documentation for cross-project usage; Integrated third-party services, including payment gateways, analytics tools, and CMS platforms, to enhance platform functionality and streamline user interactions; Implemented new features for commerce apps, leveraging Vue Storefront and Nuxt.js to deliver responsive, high-performance user experiences tailored to complex user journeys; Conducted code analysis and refactoring, optimizing legacy codebases to improve maintainability, reduce technical debt, and align with modern frontend standards; Enhanced applications performance through efficient state management with Vuex and Vue-router, ensuring seamless navigation and fast load times across diverse devices; Implemented and maintained unit and end-to-end tests using Jest and Cypress.

Luxury jewelry e-commerce store featuring custom-designed collections, detailed product showcases, and a streamlined shopping experience from discovery to checkout. Developed a responsive frontend using HTML5 and CSS3, ensuring an elegant user experience aligned with the brand’s luxury aesthetic; Built dynamic, component-based interfaces with Vue.js, creating interactive product galleries and customizable order forms to enhance customer engagement; Implemented smooth navigation and state management to deliver a fluid, single-page application experience tailored to e-commerce workflows; Integrated third-party APIs for payment processing and inventory management, streamlining the purchasing process; Optimized website performance to achieve fast load times and cross-browser compatibility, boosting user retention and conversion rates.

Health analytics platform that integrates wearable data to provide personalized insights, real-time wellness metrics, and actionable recommendations for improving overall well-being. Frontend development of the corporate website, creating a dynamic and responsive interface to showcase Welltory’s health and wellness solutions; Designed interactive navigation and scrolling features to enhance user engagement with the platform’s core offerings and data-driven insights; Integrated third-party analytics services to capture user behavior, enabling data-informed optimizations for the corporate site’s performance; Developed reusable UI components to ensure a consistent and visually appealing design across all sections of the website; Optimized the site’s performance to deliver fast load times and a seamless experience across multiple devices and browsers.

Employee engagement and communication platform that delivers company updates, multimedia content, and social interactions, helping teams stay informed, connected, and aligned across the organization. Developed responsive and accessible frontend interfaces using HTML5, CSS3, and jQuery, ensuring a seamless user experience across devices and browsers; Implemented interactive audio features with HTML5 Audio to deliver engaging multimedia content; Integrated YouTube API and Instagram API to embed real-time video content and social media feeds, enhancing employee engagement with company campaigns; Wrote clean, maintainable JavaScript code to handle dynamic UI interactions, including content updates and event-driven functionalities; Optimized website performance and cross-browser compatibility, leveraging CSS3 for modern styling and animations.