Roman Bretskii

A results-driven JavaScript Developer focused on creating solutions that meet business goals through advanced technologies. Specializes in developing custom software solutions to address unique client requirements. Strong technical background with a proven ability to deliver high-quality software within tight deadlines.

Skills and Tools

  1. JavaScript (ES5, ES6, ES7), TypeScript, Python, Rust

  2. React, React Native, Redux (Saga, Thunk, Form), React Connect, React Query, React‑Router, Formik, Ant Design, Axios, Webpack, HTML, CSS, LESS, SASS, DOM, Tailwind CSS, CSS‑in‑JS

  3. Node, Express, MongoDB, Mongoose, XML, YAML, JSON, REST API, Postman, Swagger, WebSockets, JSON Web Token, Passport, GitHub, Xcode, AWS, Firebase

  4. Asynchronity, Clear Functional Programming, Server Side Rendering, Agile, Scrum, Time management

Technical Proficiency

  1. Extensive experience in designing and implementing complex software solutions tailored to meet specific business requirements, from full‑stack web applications to high‑frequency trading systems.
  2. Strong technical background in JavaScript, with hands‑on expertise in both frontend and backend development, including React, React Native, Node.js, and Express.
  3. Proficient in building scalable, secure, and performant applications, including real‑time data processing systems and enterprise‑level business applications.
  4. Skilled in managing the full lifecycle of projects, from architecture design and development to deployment and maintenance, ensuring high‑quality outcomes.
  5. Adept at integrating and handling complex API connections, WebSockets, and database management across diverse environments, including AWS, Firebase, and Ubuntu servers.
  6. Proven ability to collaborate effectively within cross‑functional teams, ensuring that project goals align with technical execution and business objectives.

Work experience

  1. JavaScript Automated Trading System Developer

    Freelance, Remote

    Developed a high-frequency trading software designed to process and synchronize data from multiple exchanges in real-time.

    Engineered a complex backend architecture to manage and handle fast, continuous data streams through WebSockets, ensuring accurate and efficient data processing.

    Deployed and secured the system on an Ubuntu server, optimizing for performance and reliability.

    Managed the entire lifecycle of the bot, from architecture design to deployment, including the execution of real trading operations.

    Integrated and handled all necessary APIs and WebSockets, ensuring accurate price updates and position management in a live market environment.

    Skills: JavaScript, Node.js, Axios, WebSockets, Backend Architecture, Ubuntu, AWS, High-Frequency Trading, Data Synchronization, Security

  2. FullStack JavaScript Developer

    Dinskaya Melnica, Krasnodar

    Developed a comprehensive business application for a mill factory, integrating client databases, order histories, and real-time production tracking.

    Built a system to monitor and manage raw material balances, production quality, and worker shifts, with automatic updates to inventory levels and financial data.

    Implemented dashboards for real-time monitoring of balances, prices, credit/debit transactions, and payments linked to bank accounts and counteragents.

    Automated manufacturing processes, salary calculations, and financial operations, ensuring all data is securely updated and accessible 24/7.

    Managed and secured the system on MongoDB, supporting thousands of clients, orders, and transactions.

    Created integrated manufacturing journals to track analysis and repair operations.

    Skills: JavaScript, React, Redux, Redux-Saga, Node.js, MongoDB, Express.js, Dashboard Development, API Integration, Business Process Automation

  3. JavaScript React-Native Developer

    Freelance, Remote

    Contributed to the development of a React Native mobile application for a Dutch company, accurately integrating a Figma design into the app.

    Collaborated with a team of JavaScript professionals.

    Ensured high-quality code and design accuracy to meet the project's requirements.

    Skills: JavaScript, React Native, Xcode, Figma Integration, GitHub, Mobile App Development

  4. Frontend JavaScript Developer

    Dinskaya Melnica, Krasnodar

    Developed a React-based web application for the company’s online presence.

    Integrated frontend and backend services, handling client orders and transmitting data securely via a backend.

    Deployed the frontend on Firebase, managing all domain, server, and frontend operations.

    Collaborated closely with a designer to implement frontend design, ensuring a responsive and user-friendly interface.

    Skills: JavaScript, React, Redux, Redux-Saga, Express, Firebase, Webpack, SSL, HTML5, CSS3, Responsive design, Ubuntu Server Management, API Integration

  5. JavaScript Developer

    Unicorndev Amsterdam (Remote), Amsterdam

    Developed a foundational React/Redux front web application, laying the groundwork for the company's project.

    Implemented a basic Express backend to facilitate future integrations and data flow.

    Skills: JavaScript, React, Redux, Redux-Saga, Express, HTML5, CSS3, API Integration, Responsive Design

  6. Sales and Operations Planning Manager

    Dinskaya Melnica, Krasnodar

    Coordinated sales and planning of manufacturing orders, maintaining optimal inventory levels to meet client demand.

    Handled client communications, managed order logistics, and facilitated smooth delivery coordination.

    Resolved client issues promptly and effectively, contributing to the overall customer satisfaction.

    Collaborated closely with production teams to align manufacturing schedules with sales forecasts and inventory needs.

    Skills: Sales Management, Inventory Planning, Client Management, Order Logistics, Production Coordination, Communication, Problem Solving

Education and Qualifications

  1. Master Degree in Economics and Management of Enterprises

    Kuban State Agrarian University