We built a new cloud native, serverless platform and replaced their legacy infrastructure with 0 downtime. Core functional components: user/admins signup and login, payment gateway subscriptions, tax calculation and federal reporting, issue invoices against federal system, analytics, alerts.
Tech stack: AWS (Lambda, DynamoDB, ApiGateway, Cognito, SQS, SNS, SES, S3), Terraform, GitLab Pipelines, React