> Markdown version of [/jobs/ext/3029548-senior-ruby-rails-back-end-developer](https://www.wearedevelopers.com/jobs/ext/3029548-senior-ruby-rails-back-end-developer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Ruby/Rails Back-End Developer - **Company:** Emerchantpay Corporation - **Location:** North, United States (Remote available) - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** JavaScript (Programming Language), Application Programming Interfaces (APIs), Amazon Web Services, Databases, Payment Systems, PostgreSQL, MySQL, Payment Service Provider, RabbitMQ, Ruby on Rails, Redis, Ansible, Ruby, Web Application Security, ReactJS, Rspec, Backend, Containerization, Graphql, React Redux, Terraform, Docker - **Published:** September 22, 2026 - **Apply:** https://arc.dev/remote-jobs/j/redirect/pm2xz0sneo ## About the Role * 3-4+ years using Ruby and Ruby on Rails * Database experience with MySQL and/or PostgreSQL * Experience with JavaScript * Comfortable with TDD/BDD practices, Rspec * Fluent English, both written and verbal Considered an advantage: * Experience in building APIs using the latest standards * Experience with React and Redux * Experience with Redis * Experience with RabbitMQ * Experience with GraphQL * Web security knowledge * Experience with Docker and containerized workloads * Experience with AWS, Terraform, and Ansible * Previous experience in the payment industry ## Description * Designing and implementing complex workflows, APIs, and UI backends for payment platforms * Performing TDD/BDD using various tools like RSpec * Take part in scaling highly available payment services (99.99% uptime)