Ruby Developer

Xebia is a global AI-first, digital transformation, and engineering partner. With over 25 years of experience and a team of 5,000 professionals across 16 countries, we help organizations design and build scalable products, platforms, and data-driven solutions. 

We specialize in Artificial Intelligence, Data and Cloud, Intelligent Automation, and Digital Products, combining deep technical expertise with a strong focus on engineering excellence and a people-first culture.  

In the CEE region, we’re a team of nearly 1,000 experts delivering modern applications, data platforms, and AI solutions for clients such as McLaren, Aviva, Deloitte, Spotify, Disney, ING, UPS, Tesco, Truecaller, AllSaints, Volotea, Schmitz Cargobull, Allegro, InPost, and many, many more. We work with leading technologies including AWS, Azure, GCP, Databricks, and Snowflake, and combine strong engineering culture with a consulting mindset and a continuous focus on growth and knowledge sharing. 

We are looking for Ruby Developers to join projects delivered for our international clients operating across complex digital and enterprise environments. Our clients are established organizations supporting business-critical platforms and applications through modern software engineering practices, long-term product evolution, and continuous modernization initiatives.

This role is a great opportunity to work on mature Ruby on Rails applications that continue to evolve in active production environments. You will contribute to the development, maintenance, and modernization of multiple applications built primarily around monolithic architectures, while incorporating modern engineering practices such as Event-Driven Design and Domain-Driven Design (DDD). The projects are not greenfield and not pure maintenance — they combine ongoing feature delivery, technical improvements, architectural evolution, and operational support within complex business ecosystems.

• 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.

• 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,
• Work from the European Union region and a work permit are required.

• 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.

CV review – HR call – Interview – Client Interview – Decision