Role Description You will be: - Develop, maintain, and improve Ruby on Rails applications supporting business-critical processes and workflows. - Work primarily within monolithic application architectures while contributing to modernization and architectural improvements. - Implement backend features, integrations, and business logic using Ruby and Ruby on Rails. - Collaborate with frontend developers to support integrated user experiences and maintain legacy frontend components where required. - Participate in the implementation of Event-Driven Design and Domain-Driven Design (DDD) principles within evolving application architectures. - Write and maintain comprehensive unit and integration tests using RSpec and/or Minitest. - Work closely with Product Owners, QA engineers, and client stakeholders to refine and implement business requirements. - Manage deployments and support delivery processes across multiple environments, including legacy on-premises infrastructure and containerized platforms. - Contribute to CI/CD processes, automation, and operational improvements using modern DevOps practices and tooling. - Support troubleshooting, debugging, performance optimization, and production stability activities. - Ensure high code quality through code reviews, testing, refactoring, and continuous improvement initiatives. Qualifications - Commercial experience as a Ruby Developer in modern web application environments. - Strong hands-on experience with Ruby on Rails and the Ruby ecosystem. - Good understanding of monolithic application architectures and backend application design. - Experience with Ruby ecosystem tools such as Bundler and RubyGems. - Strong experience writing unit and integration tests using RSpec and/or Minitest. - Practical experience with MySQL / MariaDB and Redis. - Experience working with frontend integration technologies such as NodeJS, Yarn, and Webpacker. - Basic familiarity with AngularJS or maintaining legacy frontend components. - Experience with deployment and infrastructure automation tools such as Capistrano, Ansible, and Docker. - Good understanding of CI/CD workflows and DevOps practices. - Experience with Git-based development workflows, including GitHub or Azure Repos. - Practical experience working with Azure DevOps Pipelines or similar CI/CD platforms. - Familiarity with Linux-based environments, preferably RedHat. - Basic understanding of container orchestration concepts, including Kubernetes / AKS environments. - Experience working with secure enterprise access environments and tooling. - Awareness of security best practices and experience using security scanning tools such as Snyk or equivalent. - Experience managing dependencies and private packages repositories. - Understanding of SPA concepts and modern frontend development practices. - Good understanding of Event-Driven architectures and Domain-Driven Design principles. - Ability to troubleshoot and navigate across the full application stack, from database to frontend layer. - Practical experience using AI-powered assistants (e.g. Claude Code, GitHub Copilot, Cursor) to improve productivity, quality, or decision-making in software delivery. Requirements - Work from Bulgaria and a work permit are required. - Work from the European Union region and a work permit are required. Nice to have - Experience modernizing legacy Ruby on Rails applications. - Experience working with enterprise-scale monolithic systems. - Knowledge of containerized and cloud-adjacent deployment environments. - Experience contributing to architectural modernization initiatives. - Experience applying GenAI in a more structured way within the SDLC, including defined workflows, prompt patterns, or tool integrations embedded into daily work. - Interest in and familiarity with emerging AI-driven practices (e.g. agent-based workflows, automation patterns, AI-augmented development), with a willingness to explore and experiment beyond standard approaches. Recruitment Process - CV review - HR call - Interview - Client Interview - Decision