TypeScript, React, Redux, GraphQL, Apollo Client, webpack, SCSS, styled-components, Storybook, Jest, PostCSS, OpenAPI Backend Ruby, Ruby on Rails, Sinatra, Python, GraphQL, OpenAPI iOS Swift, Objective-C, Realm, RxSwift Android Kotlin, Dagger, Retrofit, Kotlin Coroutines, RxJava Other Docker, AWS CodePipeline, Terraform, Chef, Serverless Framework, AWS SAM Infrastructure AWS EC2, ELB, ECS, ElastiCache, CloudFront, Route53, S3, SQS, SES, SNS, Lambda, API Gateway, CloudSearch, Elasticsearch Service, Athena, Glue, Fargate Database Amazon Aurora MySQL, Amazon Redshift, Amazon DynamoDB Container Orchestration Amazon ECS CI CircleCI, Bitrise, GitHub Actions Code Management GitHub