Nazarii – React, Node.js, Typescript

The Bitcoin fork is a fork of the Bitcoin blockchain. It aims to fulfill Satoshi Nakamoto's original vision of Bitcoin. The fork focuses on providing stability, scalability, and security, allowing for larger block sizes and more efficient transactions.

• Implemented new feature from scratch;
• Added a fresh new front end;
• Debugged and resolved the application issues;
• Wrote unit, integration, and e2e tests;
• Created CI/CD.

AllianceBlock is an infrastructure provider for decentralized tokenized markets.

• Led front-end development of key modules for decentralized market infrastructure, ensuring optimal performance and security;
• Optimized frontend and backend architecture, improving system efficiency and user experience by a significant margin;
• Mentored junior developers, ensuring adherence to best coding practices;
• Collaborated with stakeholders to align technical development with business goals, resulting in enhanced project outcomes;
• Managed project timelines, conducted code reviews, and provided strategic direction for the technical team;
• Worked on both frontend (React.js) and backend (Node.js) components, developing new features and maintaining existing ones;
• Identified and resolved system bottlenecks, improving deployment pipelines and CI/CD processes.

One the largest in the country and most established cryptocurrency exchanges, offering secure trading for a wide range of digital assets, including Bitcoin and Ethereum. It provides advanced trading features, OTC services, and staking options, with a focus on regulatory compliance and strong security measures, making it a trusted platform for both retail and institutional investors.

• Developed and maintained high-traffic trading systems with a focus on performance, reliability, and security;
• Collaborated on compliance and regulatory measures, ensuring the platform adhered to national and international standards, which reinforced its reputation as a trusted exchange;
• Contributed to the improvement of the platform's security measures, including user authentication systems, safeguarding against potential breaches;
• Worked on the development and enhancement of both frontend (React.js) and backend (Node.js) systems, ensuring seamless integration between various components;
• Focused on implementing and improving advanced trading features, such as limit orders, real-time data feeds, and market analytics;
• Worked closely with the DevOps, compliance, and security teams to ensure the platform's architecture aligned with regulatory requirements and security best practices;
• Analyzed system performance, identifying areas for improvement and contributing to enhancements that resulted in faster transaction processing and reduced latency.

A Gym web app designed to streamline fitness management by offering personalized workout plans, class schedules, and progress tracking. Users can easily book sessions, monitor their fitness goals, and access workout libraries, while gym owners can manage memberships, trainers, and class schedules.

• Designed and implemented a responsive user interface that provided a smooth user experience across devices, ensuring accessibility for both mobile and desktop users;
• Developed interactive features such as session booking, progress tracking, and personalized workout plans, increasing user engagement and satisfaction;
• Integrated a dynamic workout library that allows users to search and filter exercises, enabling them to easily create and follow tailored workout routines;
• Improved frontend performance, optimizing loading times and enhancing the app’s responsiveness, particularly for data-heavy features like progress tracking and class schedules;
• Collaborated closely with backend developers to ensure seamless integration between the UI and backend services, resulting in a cohesive and reliable platform;
• Regularly tested and optimized the front-end code to enhance speed, reduce load times, and ensure smooth navigation for users.

eCommerce app designed to provide a seamless shopping experience, allowing users to browse, search, and purchase products from various categories. It offers personalized recommendations, secure payment options, real-time order tracking, and an intuitive user interface. For sellers, the app provides tools for inventory management, sales analytics, and customer support, ensuring efficient and user-friendly online shopping for all.

• Designed and developed a user-friendly shopping interface that simplifies browsing, searching, and purchasing, leading to improved user engagement and higher conversion rates;
• Integrated personalized product recommendations, using dynamic algorithms to enhance the shopping experience by presenting users with relevant items based on their preferences and shopping history;
• Ensured secure and streamlined payment integration, improving the checkout process and minimizing friction for users making purchases;
• Developed and implemented a real-time order tracking system that allows users to view the status of their orders, providing transparency and boosting customer satisfaction;
• Collaborated with the backend team to optimize the performance of the front end, ensuring fast loading times, especially for product-heavy pages, and improving user retention;
• Focused on creating a fully responsive design, optimizing page load times, and ensuring smooth functionality across all devices, particularly for mobile users;
• Conducted regular testing to ensure the app’s features worked seamlessly, identifying and resolving UI issues to ensure a smooth and error-free experience.

A CRM app built to enhance customer relationship management by streamlining interactions, sales processes, and customer data. It offers tools for tracking leads, managing sales pipelines, automating follow-ups, and providing real-time analytics.

• Developed a lead tracking system that allows sales teams to efficiently monitor and manage potential customers, increasing conversion rates;
• Designed and implemented automated follow-up mechanisms, which helped reduce manual work for sales teams and ensured timely interactions with prospects;
• Built a sales pipeline management feature, allowing users to track deal progress, prioritize tasks, and improve forecasting accuracy;
• Integrated real-time analytics and reporting tools, providing users with actionable insights into sales performance, customer engagement, and conversion metrics;
• Optimized both frontend and backend architecture to ensure the app handled large-scale data efficiently, improving overall performance and scalability;
• Developed critical features such as lead tracking, sales pipeline visualization, and automated follow-ups to streamline sales workflows;
• Created and integrated APIs for data handling and third-party services, ensuring efficient communication between the CRM app and external tools.