Design · HQ: Italy · 1 to 50 employees
Balsamiq is a wireframing tool which can help your team with the UI designing process.
Design · HQ: United States
thoughtbot (founded 2003, Boston) is a fully remote product design/development agency (design sprints, prototyping, UX) with 100 people in 14 countries (Africa, Americas, Europe, West Asia). Staff have 4 client days, Fridays for learning or volunteering, 40-hour weeks and 4+ weeks off.
Ruby 
Rails 
Golang 
Elixir 
Design · HQ: Japan
Eukarya (Tokyo, Japan) builds a 3D digital twin and visualization platform for urban planning and infrastructure. Its international team is fully remote.
Project management · No office
37signals (named Basecamp from 2014 to 2022) is a fully remote software company. It makes Basecamp for project management, Hey for email and Fizzy for kanban.
Ruby Rails 
DevOps · HQ: United States
HashiCorp, an IBM company, makes multi-cloud infrastructure automation tools: Terraform, Vagrant, Packer, Consul, Vault, Nomad, Boundary, Waypoint and Project Infragraph (agentic automation). Mitchell Hashimoto and Armon Dadgar founded it in San Francisco in 2012. It is a remote company.
Ruby Rails 
MySQL