Ruby software development

Need to work on software using Ruby and Ruby on Rails to develop a product from the field of telecommunications. It will be necessary to rework the existing code base, develop internal and external services and implement new functionality in accordance with the ToR. Software stack: Ruby, Ruby On Rails, Roda/Sinatra, Sidekiq; MySQL, PostgreSQL, Redis React, Typescript ClickHouse, Elasticsearch, RabbitMQ; Docker, Ansible, Capistrano, Terraform. English customer relations experience.