Developed and maintained enterprise applications working with React, JavaScript, TypeScript and Python, delivering new functionality and improvements. Built and enhanced complex React interfaces and reusable components for internal enterprise apps. Participated in major frontend components and library migrations, modernizing existing applications while maintaining backward compatibility and application stability. Investigated and resolved production incidents and application issues, improving system stability and user experience. Built Python automation tools for user migration, configuration management and repetitive operational processes, reducing manual engineering work. Developed internal services and tooling to improve operational efficiency and prevent redundant process executions. Managed application releases and end-to-end production deployments using Jenkins, Spinnaker and Cloud Foundry. Monitored and troubleshot production applications, identifying performance, memory and application-level issues. Collaborated with developers, product stakeholders and other engineering teams to design and deliver solutions across multiple internal applications. Integrated AI-assisted development tools and custom workflows, including MCP integrations, to support coding, debugging, code reviews, documentation, and Jira automation. Led internal knowledge-sharing sessions on Clean Code and software engineering best practices.