Worked as a freelance front-end developer for various clients, focusing on building responsive and dynamic web applications using Angular and React.Consultation: Provided consultation services to clients, advising on best practices in front-end development, UI/UX design, and performance optimization.

Gitential was a Git analytical web application designed for software developer companies. My responsibilities spanned both backend and frontend development, along with extensive DevOps tasks.Migrated outdated Riot.js frontend to React 17, optimizing codebase for quicker feature deployment; facilitated seamless integration of design requests and custom features using Sass, Redux, and Webpack 4.Created a comprehensive library utilizing Plotly.js that processed and visualized Git data, which decreased the implementation time for new charts by 80%.Developed robust backend system using Python, FastAPI, SQLAlchemy, and Ibis, with PostgreSQL as the database.Managed and optimized AWS services, including EC2, EKS, S3, CloudFront, and Route 53. Focused on daily error elimination in Kubernetes environments.Resolved performance bottlenecks and bugs regularly to maintain a seamless user experience.Coordinated a small team of three developers during the last year at the company, guiding the team through critical projects and ensuring high-quality deliverables.

Worked on diverse projects, contributing to both backend and frontend development.Developed a Java Liferay backend for an agricultural webshop application.Rewrote the backend as part of a team involving Kubernetes and microservices with Java Spring Boot, including Helm and Skaffold, with PostgreSQL, utilizing reactive Java for non-blocking microservices which resulted in about 50x improvement in response times.Developed the frontend for Liferay portlets in JSP-s using JavaScript and jQuery, then improved them by migrating to React.Built a news-board application using Angular for internal usage for the company employees which resulted in boosting the morale and improving social communications.Improved the applications’ visual appeal and usability by working with CSS, focusing on responsive design and user experience.