Senior Full Stack Developer (LatAm) - RoR/React

We are looking for a Lead/Senior Full Stack Engineer to help to build, maintain, and scale its Ruby on Rails backend services, APIs, integrations, and React-based frontend features . This is a backend-heavy full stack role: approximately 70% backend and 30% frontend . The ideal candidate has 5–7+ years of software engineering experience , strong Ruby on Rails expertise, solid React skills, and the ability to work independently in a fast-paced remote environment. Responsibilities Develop and maintain backend services using Ruby on Rails . Build and improve frontend features using React . Support third-party integrations, including payment and e-commerce platforms. Troubleshoot backend, database, frontend, and integration issues. Collaborate with QA on testing and release validation. Participate in technical planning, architecture discussions, code reviews, and audits. Improve systems through refactoring, upgrades, and performance optimization. Use AI-assisted development tools to improve productivity, testing, debugging, and documentation. Requirements 5–7+ years of software engineering experience. Strong experience with Ruby on Rails . Solid experience with React , JavaScript/TypeScript, HTML, and CSS. Strong SQL and relational database fundamentals. Experience with REST APIs and third-party integrations like Stripe API and Shopify API . Experience with automated testing or TDD practices. Strong debugging, analytical, and problem-solving skills. Understanding of web application performance and security best practices. Familiarity with AI-assisted development tools such as GitHub Copilot, Cursor, ChatGPT, Claude, or similar . Excellent communication, self-organization, and remote collaboration skills.