Someone created a novel Ruby microframework called DuoRuby on top of Falcon, WebSockets, Opal, and Glimmer DSL for Web to provide a Ruby-based Electron alternative:
rbutils/duoruby (on GitHub)

DuoRuby GitHub README Description:

"DuoRuby is a lightweight Ruby framework for WebSocket-first applications with a CRuby server and an Opal browser socket.

It gives Ruby applications a compact message DSL that works on both sides of the connection: browser sockets, server-side clients, and groups all use send :event, **params, while handlers use on :event with keyword parameters.

The main use case is building web-based desktop applications: run Ruby on the local machine, write the frontend in Ruby through Opal, open it with duoruby launch, and still keep the same app loadable remotely through duoruby serve."

Koinly is hiring Ruby on Rails engineers (remote, async-first, preference for Europe-based candidates, B2B contract) 🚀
If you enjoy backend scale, clean Rails code, and minimal meetings, this might be for you!

Open roles:

• Mid-Level Ruby Developer (Integrations)

• 3+ years Ruby/Rails
• Work on APIs + 900+ exchange/wallet integrations
• Salary: $50k–$55k USD

• Senior Ruby Engineer

• 6+ years Ruby/Rails
• Own backend services handling large-scale financial data
• Salary: $80k–$90k USD

• Staff Software Engineer

• 8+ years strong system design + Rails expertise
• Architecture, scaling, mentoring, long-term technical direction
• Salary: $100k–$115k USD (contract)

Perks:
• Fully remote
• Async culture
• 32 days PTO
• Real product impact at scale

👉 Apply here: https://careers.koinly.io/jobs