Senior Full-Stack Engineer (Ruby)

**About The Opportunity** We are looking for a highly experienced **Senior Full\-Stack Engineer** to work on reverse supply chain processes, including trade\-ins, recycling, repairs, and returns. The role involves maintaining and enhancing an existing Rails 6/7 application focused on electronic recyclables, covering inventory, scheduling, transportation, management, and processing. **Responsibilities** * Design, develop, and maintain web applications and components using Ruby on Rails. * Build and integrate APIs with 3rd party companies and internal applications. * Collaborate with internal partners and external vendors to deliver scalable solutions. * Troubleshoot and resolve performance, response time, and capacity issues. * Maintain high\-quality documentation and ensure data integrity across systems. * Perform both front\-end (GUI) and back\-end development tasks. **Required Qualifications** * Strong experience with Ruby on Rails development * Strong expertise in API design and integration (JSON, ProtoBuf, REST, RPC, XML, etc). * Proficiency in front\-end technologies (HTML, CSS, JavaScript, Bootstrap, JQuery). * Experience with Continuous Integration tools (CircleCI, Jenkins). * Familiarity with testing frameworks (RSpec, MiniTest). * Bachelor’s degree in Computer Science, Engineering, or equivalent technical training. * Advanced English. **Nice To Have Skills** * Experience with Go development. * AWS knowledge and hands\-on cloud experience. * Strong problem\-solving skills with the ability to optimize performance and scalability.