Roman Lysov Email & Phone Number

Spain

Developed a solution for organizing and conducting darts tournaments.- Implemented the backend using Python (Django) + PostgreSQL + Redis for performance assurance- Used and optimized web sockets with django-channels- Deployed a custom WebRTC server for real-time match broadcasting, enabling video stream recording and merging- Developed a high-performance API for integration with betting systems using DRF- Implemented authorization via email, OAuth2, and QR codes- Designed a system for collecting and analyzing statistics with historical changes preservation- Conducted complex custom database migrations, including modification of primary keys- Performed full data recovery from backups (see the point above for why)- Developed a mobile application in React for game process management- In the React application, applied a custom data model designed with principles of classic OOP, and implemented a custom layer for network interactions- Used the same js data model for both the website and the application- Configured Cloudflare for traffic utilization optimization and protection against DDoS attacks- Configured inbound and outbound mail on the domain, and also used Amazon SES for sending emails

https://github.com/semrush/intergalacticWorking on an open-source design system:- Developed complex components, including charts and tables- Created a custom style system with a mechanism for applying styles and theming- Developed several plugins for Babel and webpack to work with AST- Standardized testing processes, achieving code coverage of over 80% with more than 2,000 tests- Developed a high-performance service for creating screenshots based on NodeJS, Playwright, and Kubernetes- Created an effective communication system with users of the design system- Optimized the code review process to speed up product releases- Developed a technical strategy for improving the stability of the design system- Defined quality standards for components and steps for compliance and implementation- Implemented a process for prioritizing incoming requests to optimize team resource utilization- Conducted technical reviews, including creating a competency matrix and skill development plan- Also engaged in training and onboarding new developers- Organized specialized retrospectives for identifying and solving the team's soft issues.

Working on a design system- Initiated the launch of this direction in the company by proving its necessity and effectiveness- Developed and implemented a component library across the entire company- Collaborated with more than 60 developers from 20+ teams- Created a transformer from React to web components and then to VueJS- Optimized the rendering of more than 1,000 simultaneous web components depending on the computer's performance- Created a Chrome extension for designers- Participated in hiring employees as a technical expert- Spoke at major conferences with presentations https://youtu.be/K5ryhLsXdmA

Support and development of more than 10 company products (sections) simultaneously, such as a service for conducting and viewing webinars (ReactJS/Django), a news section (VanillaJS/Django), the company blog (VanillaJS/Django), mobile version of the website (VanillaJS/NodeJS), email sending service, short link service (Angular/Php Phalcon), knowledge base (BackboneJS/Django), and much more.For simultaneous support, development, and stability of all products, the following was done:- splitting the monolith into microservices- implementing a component-based approach- standardizing the architecture of services- introducing the concept of T-shaped people- handling the full cycle from repository to deployment, including server setup, building, and deploying- implementing a DevOps culture and promoting it within the company- implementing and supporting GitLab CI/CD- achieving about 70% test coverage- embracing the philosophy of full responsibility for the product- deploying each service in a clusterI took an active part in every stage of project development, from brainstorming product development ideas to high-load production. Working in a complex, changing environment, I mastered the Zen of Agile approach and learned how to build processes within the team.

Developed a solution for managing games across various sports (more than 10), as well as for transmitting this information to bookmakers for odds calculation.- Implemented a complex admin panel using Django- Created an event processing service based on NodeJS- Implemented a REST API for interaction between services on NodeJS and Python- Applied sharding and partitioning of the event database in PostgreSQL for performance optimization- Ensured data synchronization when multiple operators are managing a single game simultaneously- Developed a mobile application using Angular, and then migrated it to React- Created a cross-platform mobile application for iOS and Android based on WebView- Optimized the mobile application for support of outdated browser versions- Deployed the entire infrastructure on VPS using Ansible- Implemented seamless application deployment through Docker containers and Nginx

Development of new functionality for the company, support, and refactoring of old code.The goal was to create a modular, dynamic web application (SPA), where all rendering and routing would be handled on the client side. The project was divided into subprojects, each of which was a separate SPA application and was developed using different libraries and approaches. All the projects were integrated into a single application and worked as a unified whole. My responsibilities included:- writing the main, controlling parts of the application- developing the architecture of modules- building the project- optimizing resources

St Petersburg City, Russia

Development of the company's new website (e-commerce store).Tasks I handled: created layouts for all pages of the new website, wrote interactive JavaScript widgets, communicated with the backend, solved problems on the fly, implemented project build using Grunt, developed a customer dashboard as a SPA using Backbone, maintained the company's old website, created HTML emails.

My first commercial programming experience. Outsourcing in my free time from studies.I engaged in this primarily for self-education and acquiring new skills.Mostly, I worked on creating layouts and jQuery widgets.