Developed and implement many features: patients's service, doctor's service, auth service, based on dry-events Events system and notifications service. Integration with customer ERP, third-parties apps.
Stack of technologies: ruby 2+, ruby on rails 5+, docker, MongoDB, redis, sidekiq, react, etc.
Developing and support of one of the largest pos-systems - Poslogic. Feature development: integration with external partners (some banks and insurance companies - Renessans, RGS, Qiwi) - soap & rest APIs development, personal areas, reports). Bug fixing and so on.