Technologies & Skills:

TypeScript, JavaScript, React.js, React Hooks, Redux, Node.js, Express.js, PostgreSQL, Mapbox GL, REST API, i18next, Lodash, Day.js, HTML5, CSS3, SASS/SCSS, Git
Key Achievements & Responsibilities:

• Led full-stack development of 3 production CRM systems (2 pipeline monitoring platforms for Sweden, 1 real estate CRM for the US).
• Designed and implemented interactive maps, dashboards, and real-time data visualizations for infrastructure monitoring and analytics.
• Built scalable client-server architecture, integrated REST APIs, and optimized performance for complex data-driven interfaces.
• Delivered maintainable solutions with focus on UX, performance, and long-term scalability.

Technologies & Skills:

TypeScript, JavaScript, React.js, React Hooks, Redux, Redux Toolkit, UIkit, Styled-components, SASS, i18next, Lodash, Date-fns, PWA, Webpack, Visicom Maps, SIP, VoIP, WebRTC
Key Achievements & Responsibilities:

• CRM Frontend Development: Designed and developed a high-performance CRM frontend with interactive maps, GPS tracking, route calculation, dynamic pricing zones, and complex data tables, optimizing real-time updates and large datasets.
• Full-Stack Integration & Architecture: Built scalable client-server architecture, integrated REST APIs, and ensured seamless communication between frontend and backend systems for reliable data processing.
• Real-Time Communication & PWA: Implemented SIP for VoIP calls and status updates between dispatchers and drivers, and developed Progressive Web App functionality, enabling offline access, push notifications, and improved mobile performance.
• Process Automation & UX Optimization: Automated taxi order lifecycle (clients, agents, contractors, tariffs, payments), improving workflow efficiency and user experience, while ensuring maintainable and secure code.

Technologies & Skills:

TypeScript, Electron, Pixi.js, Howler.js, CSS3, Vite, modular architecture, event-driven programming, game mechanics, physics simulation
Key Achievements & Responsibilities:

• Developed a desktop Arkanoid game from scratch using modular, event-driven architecture.
• Implemented core game mechanics: physics simulation, paddle control, collision detection, and user interaction.
• Designed clean, maintainable code structure focused on performance and extensibility.
• Gained hands-on experience in project planning, debugging, testing, and iterative improvement.

My personal projects:

• (Game) https://tinyurl.com/mw82s48k
• (Website) https://banderogus-from-ukraine.netlify.app/

Technologies & Skills:

JavaScript, JSX, React.js, React Hooks, Redux, Node.js, Express.js, MongoDB, HTML5, CSS3, SASS/SCSS, Git, REST API, Firebase

Key Achievements & Responsibilities:

• Delivered full-stack e-commerce platform from scratch, covering client, server, and admin functionality.
• Implemented order processing, product catalog management, and interactive UI components.
• Integrated payment systems and transactional workflows to support real business operations.
• Ensured stable API communication and maintainable application architecture.

Technologies & Skills:

JavaScript, JSX, React.js, React Hooks, React Native, Redux, Node.js, Express.js, MongoDB, HTML5, CSS3, SASS/SCSS, Ant Design, Git, REST API, Day.js, Google Drive API, Webpack, PWA, MailerSend, Firebase, CRM, automation, document management

Key Achievements & Responsibilities:

• Full-Stack CRM Development: Built web and mobile CRM systems and business websites from scratch, covering client and server functionality, automating the full client case lifecycle, and improving operational efficiency.
• Data Management & Analytics: Designed and implemented complex tables, document management, analytics dashboards, and payment tracking features, enabling data-driven decision-making and workflow automation.
• PWA & Mobile Optimization: Developed Progressive Web App functionality for offline access, push notifications, and enhanced mobile UX across platforms.
• Email Automation & Client Communication: Integrated MailerSend to create automated email pipelines, notifications, and subscription workflows, enhancing client engagement and retention.

My commercial projects:
(open-source and currently maintained)

• https://zahist.ua/
• https://play.google.com/store/apps/details?id=com.zahist.client
• https://zahist.in.ua/
• https://client.zahist.ua

Technologies & Skills:

JavaScript, React.js, Redux, Node.js, Express.js, MongoDB, HTML5, CSS3, PHP, WordPress, jQuery, Git, REST API, Figma, React Hooks, UI/UX design, Angular

Key Achievements & Responsibilities:

• Developed web and mobile applications for internal and external clients.
• Implemented UI/UX designs and integrated backend services.
• Worked on full-stack features including data handling, APIs, and user interfaces.
• Collaborated with designers and stakeholders to deliver production-ready solutions.

Technologies & Skills:

JavaScript, HTML5, CSS3, PKI, cryptography, key management systems, ERP, embedded systems, TCP/IP, FTP

Key Achievements & Responsibilities:

• Developed internal enterprise software for large-scale organization.
• Worked with cryptographic protection systems, digital certificates, and key management infrastructure.
• Supported secure data exchange and software cryptography solutions.
• Participated in ERP and ARM-based embedded systems integration.

Technologies & Skills:

TCP/IP, HTTP, HTTPS, FTP, DNS, DHCP, network configuration, monitoring, security policies

Key Achievements & Responsibilities:

• Configured and maintained network equipment and enterprise infrastructure.
• Supported DHCP/DNS servers and network security policies.
• Monitored network traffic and participated in modernization projects.
• Ensured stable and secure operation of telecom services.