Moved backend system from AWS EC2 to AWS Elastic Beanstalk with Docker containerization using Elastic Container Registry to make the ecosystem more automated.Built CI/CD pipelines using GitHub Actions and AWS Amplify to automate the deployment of the frontend components on AWS.Expanded and optimized the functionality of the Express API by monitoring workload with AWS CloudWatch, significantly reducing server load.I developed a backend for a booking widget that included payment processing using Stripe and integration with Google Calendar. In result customer was able to replace the third-party service with this implementation.Contributed to the development of the payroll system using NestJS with GraphQL and Apollo Server.