Vyacheslav O.

Description: Architected and developed a secure, HIPAA-compliant fullstack healthcare video consultation platform. The application integrates real-time telemedicine capabilities, automated AI-driven health data processing, and a robust administrative backend to streamline patient-provider interactions and protect sensitive health information.

Role in the Project: Fullstack Developer (React & Nest.js)

Responsibilities:

• Telemedicine & Communication: Engineered a high-availability, low-latency video consultation service using Amazon Chime SDK, paired with a secure, real-time live chat system for patients and practitioners.
• Security & Authentication: Hardened platform security by implementing a multi-layer authentication system, writing custom middleware for Two-Factor Authentication (2FA), and enforcing rigorous role-based access controls (RBAC) to isolate sensitive health data.
• Admin Platform & UI/UX: Built an intuitive back-office administrative panel from scratch, focusing on accessible layout structures, highly responsive design patterns, and clean, reusable component architecture to streamline internal workflows.
• State Management & Caching: Drastically reduced server overhead and eliminated redundant API requests by configuring aggressive client-side caching mechanisms and background state synchronization for the real-time video and live chat modules.
• Automated Notifications: Developed a scalable backend notification engine to generate dynamic transactional emails, structuring reusable templates that rendered securely and shipped reliably based on asynchronous user triggers.

Technologies:

• Frontend: React, TypeScript, TanStack Query (React Query), shadcn/ui, Tailwind CSS, Amazon Chime SDK;
• Backend & AI: Nest.js, Node.js, Vertex AI, React Email, Amazon Chime;
• Database & State Management: PostgreSQL, Redis, Client-side Cache Management
• Security & Infrastructure: Two-Factor Authentication (2FA), WebSockets, HIPAA/PHI Compliance Guardrails, AWS

Description: Spearheaded the frontend development of a cutting-edge AI SaaS platform integrating LLM-powered conversational interfaces, voice-driven controls, and interactive 3D virtual spaces.

Role in the Project: Senior React Developer (AI & Interactive Experiences)

Responsibilities:

• Developed a highly responsive, custom chat interface with features like markdown rendering, real-time token streaming via OpenAI API, code syntax highlighting, and contextual memory management.
• Implemented seamless voice-to-text and text-to-speech interaction modules, optimizing latency for real-time, bidirectional voice conversations with AI agents.
• Created immersive 3D dashboard components and virtual environments, leveraging modern WebGL wrappers within React to provide users with spatial data mapping and engaging interactive graphics.
• Enforced strict TypeScript typing and modular component design across the platform, improving code reusability by 40% and drastically reducing runtime exceptions in unpredictable AI-generated UI states.
• Crafted polished layouts and animations using Ant Design and customized SCSS, ensuring the chat and 3D modules fit seamlessly into a premium, modern user interface.
• Designed mock API systems and integration tests using Express and Playwright to rigorously validate edge cases in AI streaming, unexpected API failures, and 3D canvas rendering bottlenecks.

Technologies: React, TypeScript, Tanstack core, OpenAI API, Web Audio/Speech APIs, Three.js, shadcn/ui, Ant Plots, SCSS, Express, Playwright, React PDF, AWS Amplify.

Description: Developed an innovative ERP accounting solution designed to streamline financial management and enhance operational efficiency for businesses.

Role in the project: Senior React developer

Responsibilities:

• Designed and implemented scalable React.js components, improving application performance by 25% and reducing load times by 30%.
• Spearheaded the development of a new ERP accounting solution, enabling businesses to streamline financial operations and achieve 20% faster transaction processing.
• Mentored and guided 2 junior developers, enhancing team productivity and reducing onboarding time by 40%.
• Optimized UI/UX workflows using Ant Design and SCSS, resulting in a 15% increase in user satisfaction scores.
• Conducted end-to-end testing with Playwright, achieving 98% test coverage and reducing production bugs by 35%.
• Implemented internationalization (i18n) features, expanding the application's reach to 5 new global markets.
• Reviewed and merged 100+ PRs, ensuring code quality and adherence to best practices across the development team.
• Createing mock API for testing environment

Technologies: Ant design, React, SCSS, Playwright, i18n, TypeScript, Express, Redux, Ant Plots, AWS Amplify, React PDF, UMI, Open AI API.

Description: Intelligent solution is designed for healthcare providers to enable frictionless management of patient's individual requests. First of its kind, tailored management solution for "On-demand surgery" designed specifically for healthcare providers.

Role in the project: Vue.js Developer.

Responsibilities:

• Designed and implemented scalable front-end features using Vue3 and Nuxt3, enhancing user experience for healthcare providers by 30%.
• Spearheaded the development of a first-of-its-kind "On-demand surgery" management solution, improving patient request handling efficiency by 25%.
• Optimized application performance through advanced TypeScript and SCSS techniques, reducing load times by 20%.
• Integrated i18n for seamless internationalization, enabling the app to support 5+ languages and expanding global reach.
• Collaborated with cross-functional teams to deliver 15+ new features, ensuring timely and high-quality releases.
• Identified and resolved critical bugs, improving system stability and reducing user-reported issues by 40%.
• Conducted thorough code reviews and PR assessments, maintaining a 95% code quality standard across the team.
• Hypo compliance sensitive data.

Technologies: Nuxt3, Vue3, TypeScript, SCSS, Composable, i18n, Vuetifyjs, Chart.js.

Description: An app that provides retirement fund and investment advice services to individuals, business owners, and families through their Personal Financial Planning teams. Now we have joined forces with the best-performing wealth management companies locally and Globally (referring to GWLC). In keeping with our ethos, clients are central to everything we do.

Role in the project: React.js Developer.

Responsibilities:

• Delivered 15+ new features for a retirement fund and investment advice app, enhancing user experience for 10,000+ clients.
• Spearheaded the development of responsive user interfaces using React, Next.js, and React MUI, achieving a 95% client satisfaction rate.
• Reduced bug resolution time by 30% through efficient identification and fixing of critical application flows.
• Collaborated with cross-functional teams to integrate global wealth management solutions, improving app scalability and performance.
• Streamlined UI component development using Storybook and Chromatic, cutting design-to-development time by 20%.
• Implemented TypeScript across the codebase, increasing code reliability and reducing runtime errors by 25%.
• Deployed and maintained app features on Heroku, ensuring 99.9% uptime and seamless user access.
• Review PR's;

Technologies: React, Next, Storybook, React MUI, Typescript, Chromatic, Heroku, Chart.js, GraphQL, contentful.

Description: IXAM is a cutting-edge digital platform designed to transform the way education is delivered and experienced in schools and universities. Built with precision and reliability, IXAM empowers teachers to create engaging, interactive lessons and customized tests, while providing students with a seamless and personalized learning journey.

Role in the project: Middle Front End Developer | React

Responsibilities:

• Review PR's.
• Developed and optimized reusable React components, improving code efficiency and reducing development time by 25%.
• Delivered pixel-perfect UI layouts, enhancing user experience and achieving a 95% client satisfaction rate.
• Conducted thorough code reviews, ensuring high-quality standards and reducing production bugs by 30%.
• Collaborated with cross-functional teams to integrate Redux for state management, streamlining data flow and improving app performance.
• Contributed to the development of a scalable front-end architecture, supporting the platform's growth to over 10,000 active users.
• Implemented responsive design principles, ensuring seamless functionality across devices and increasing mobile engagement by 20%.
• Enhanced testing workflows by integrating automated testing tools, reducing manual QA efforts by 15%.

Technologies: React, Redux, Ant design, JWT, mathjax, TypeScript, GraphQL.

Description: French trading platform that offers a wide choice of pairs, a market in euros, and deposits by bank card and SEPA transfer. It has a variety of features that make it an ideal place to buy and sell digital assets. Digital Service is offering cryptocurrency services. Strong security design gives protection against DDoS attacks, full data encryption, compliant with PCI DSS standards. They provide chat and ticket-based support.

Role in the project: Vue.js Developer.

Responsibilities:

• Developed and maintained a responsive Vue.js-based trading platform, ensuring seamless user experience across desktop and mobile devices.
• Built a reusable UI components library, reducing development time by 30% and improving consistency across the platform.
• Implemented complex animations using GSAP, enhancing user interaction and engagement on the platform.
• Spearheaded internationalization (i18n) efforts, enabling multi-language support and expanding the platform's reach to global markets.
• Conducted end-to-end testing with Cypress, achieving 95% test coverage and ensuring robust application performance.
• Optimized front-end performance, reducing page load times by 25% and improving overall user satisfaction.
• Collaborated on the development of an admin panel, streamlining internal operations and improving data management efficiency.
• Review PR's;

Technologies: Vue2, Vue3, Vue Router, Vuex, Typescript, Pinia, GSAP, Stylus, i18n, cypress, AWS Amplify, Express, tradingview.

Description: The 21st-century answer to buying gifts for special occasions for friends and loved ones. Members of BIFY can set up email reminders for special occasions and then view items to buy that recipient has chosen and will really appreciate.

Role in the project: React Developer

Responsibilities:

• Developed and implemented scalable React components, improving front-end performance by 30% and enhancing user experience.
• Designed and built a robust front-end architecture from scratch, enabling seamless integration with backend systems.
• Optimized code quality and reliability, reducing bug reports by 25% and accelerating feature deployment.
• Collaborated with cross-functional teams to deliver a user-friendly gift recommendation platform, increasing customer satisfaction by 20%.
• Leveraged Redux for state management, ensuring consistent and efficient data flow across the application.
• Enhanced site responsiveness, achieving a 15% faster load time and improving mobile user retention.
• Contributed to the development of email reminder features, driving a 10% increase in user engagement for special occasions.

Technologies: React, Redux, Material UI, TypeScript.

Description: Digital solutions for businesses: landing page, online store, corporate website, UI/UX design etc.

Role in the project: Front End Developer React.

Responsibilities:

• Creating web and mobile applications.
• Creating web and mobile design.
• Maintaining, optimizing, troubleshooting, and improving websites.
• Implementation of apps and landing pages from concept through deployment.
• Streamlined deployment processes, cutting development-to-launch time by 20% through efficient use of Next API and Express.
• Troubleshot and resolved critical front-end issues, achieving a 95% client retention rate through timely and effective solutions.
• Delivered 5+ high-conversion landing pages, contributing to a 25% increase in lead generation for client campaigns.

Technologies: Next.js, React, Redux, Next API, Express, different UI libraries.

Description: Architected and developed a secure, HIPAA-compliant fullstack healthcare video consultation platform. The application integrates real-time telemedicine capabilities, automated AI-driven health data processing, and a robust administrative backend to streamline patient-provider interactions and protect sensitive health information.

Role in the Project: Fullstack Developer (React & Nest.js)

Responsibilities:

• Telemedicine & Communication: Engineered a high-availability, low-latency video consultation service using Amazon Chime SDK, paired with a secure, real-time live chat system for patients and practitioners.
• Security & Authentication: Hardened platform security by implementing a multi-layer authentication system, writing custom middleware for Two-Factor Authentication (2FA), and enforcing rigorous role-based access controls (RBAC) to isolate sensitive health data.
• Admin Platform & UI/UX: Built an intuitive back-office administrative panel from scratch, focusing on accessible layout structures, highly responsive design patterns, and clean, reusable component architecture to streamline internal workflows.
• State Management & Caching: Drastically reduced server overhead and eliminated redundant API requests by configuring aggressive client-side caching mechanisms and background state synchronization for the real-time video and live chat modules.
• Automated Notifications: Developed a scalable backend notification engine to generate dynamic transactional emails, structuring reusable templates that rendered securely and shipped reliably based on asynchronous user triggers.

Technologies: 

• Frontend: React, TypeScript, TanStack Query (React Query), shadcn/ui, Tailwind CSS, Amazon Chime SDK;
• Backend & AI: Nest.js, Node.js, Vertex AI, React Email, Amazon Chime;
• Database & State Management: PostgreSQL, Redis, Client-side Cache Management
• Security & Infrastructure: Two-Factor Authentication (2FA), WebSockets, HIPAA/PHI Compliance Guardrails, AWS