Educational Platform with online classrooms and toolsFrontend:- Implemented designs with CSS to ensure seamless user interaction across devices, aligning with the web design vision. - Utilized Firebase for user registration, authentication, and authorization systems, ensuring data security and privacy compliance. - Worked closely with teams in daily meetings to address emerging issues, set tasks, and streamline product delivery using Agile methodologies. - Applied linguistic skills to standardize documentation guides to improve communication and knowledge sharing within the team.BackEnd: - Designed and implemented user authentication and authorization systems using Node.js and Express, ensuring secure access to the platform. - Developed RESTful APIs for seamless communication between the frontend and backend, enabling real-time updates and notifications. - Utilized MongoDB to enhance data retrieval efficiency and provide personalized content recommendations, implementing advanced search and filter functionality. - Implemented CRUD functionality for user accounts, managing user registration and profile data. - Integrated WebSocket technology for sending notifications from the backend to the frontend, improving user engagement. - Participated in the development of API protocols and integration, utilizing technologies such as Java, Spring Framework, and Docker.Used: JavaScript, Java, React, Redux, React Router, React Hooks, Firebase, NodeJS, MongoDB, WebSocket, Spring Framework, Docker, PostgreSQL, Git, GitHub.

Project: Payment Service Provider of online acquiring of bank cards and alternative payment methods• Developed and maintained frontend web interfaces for ecommerce payment operations, ensuring cross-device functionality and error handling.• Implemented responsive designs with CSS to optimize user interaction across mobile devices.• Utilized JavaScript and React to create dynamic and interactive user interfaces, adapting layouts and protocols based on user location and local legal requirements.• Integrated external web interfaces with internal systems using API calls, enhancing data exchange and ensuring minimal traffic loss.• Conducted user testing, gathered feedback, and provided recommendations to improve frontend designs and functionalities, leading to increased user satisfaction.Used: JavaScript, React, CSS, HTML, JSON, Linux, VirtualBox, Android.

Project: Integrated Payment Solutions Platform for online merchants high-risk. • Created responsive and user-friendly frontend interfaces for an online payment platform, ensuring seamless functionality across various devices.• Utilized JavaScript and React to develop dynamic and interactive interfaces, customizing layouts based on user location and legal requirements.• Conducted comprehensive user testing, collected feedback, and provided recommendations to enhance frontend designs and functionalities, resulting in increased user satisfaction.• Consulted with merchants on the platform's API Gateway using documentation from WiKi Confluence, facilitating quick resolution of issues.• Assigned tasks to administrators and developers via Jira, formulating requirements based on user inquiries.• Implemented a Telegram bot to automate repetitive cases, improving the speed of the support service.• Controlled the delivery of tasks to the production environment to meet announced deadlines.• Successfully integrated Chinese merchants and assisted developers in integrating with Chinese providers.Used: JavaScript, React, CSS, HTML, JSON, OTRS, Jira, Confluence, Graylog, Koyako, Kibana, MongoDB, WebSocket.

• Monitor the system’s operation through Kibana to alert admins of any abnormal behavior of the system,• Manage merchants’ requests in a ticket system Kayako and messengers.• Resolve general cases regarding logs / details / documentation, etc. using Graylog to provide request examples.• Formulate technical tasks to developers via Trello, collect necessary details on the issue.• Notify merchant on scheduled works / downtimes in ticket system and release notes via email newsletters MailChimp.• Directly contact admins in urgent cases, e.g. deploy / balances / ddos attacks.Achieved• Was a person to communicate with Chinese external providers.• Visited China in 2016 to create a local bank card linked with a mobile phone to conduct tests.• Designed email scripts on typical notifications to merchants to provide standard and accurate English emails.• SQL scripts to collect data for specific merchants in order to analyze the performance of the department.Used: Kayako, Kibana, Graylog, MySQL

- Remote technical support;- Support of POS-terminals;- Monitoring of transactions;- Monitoring of communication channels;- Monitoring of servers and applications;- Support of file exchange between Visa, MasterCard.Used: Oracle FLEXCUBE, Banker, SAS

- HelpDesk for merchants on payment issues;- Guide merchants on POS terminal equipment;- Investigate chargeback cases;- Providing reports on requested periods;- Fraud-monitoring night dutiesUsed: Triton, NCR Pos, Transmaster