Senior Ruby Developer

Location: Almaty, Kazakhstan; Astana, Kazakhstan; Belgrade, Serbia; Cluj-Napoca, Romania; Krakow, Poland; Larnaca, Cyprus; Lodz, Poland; Lublin, Poland; Remote.BG, Bulgaria; Remote.GE, Georgia; Remote.KZ, Kazakhstan; Remote.PL, Poland; Riga, Latvia; Sofia, Bulgaria; Tbilisi, Georgia; Varna, Bulgaria; Warsaw, Poland; Wroclaw, Poland; Yerevan, Armenia As a Senior Ruby on Rails Developer, you'll join the engineering team as a hands-on senior contributor on Tools Portal. You'll own significant parts of the codebase, raise the bar on code quality and engineering practices, and help shape how the internal tooling evolves. Tools Portal is a collection of internal tools built to support different operational tasks and make everyday processes easier to manage. One of its main applications is Booking Admin, designed for travel agents to view, manage, and process bookings made through the booking system. It provides a central place for handling reservations and keeping booking information up to date. The portal is built on Ruby on Rails 8.1, and applications across the client's ecosystem are hosted on a combination of on-premises infrastructure and Google Cloud Platform. Design, build and maintain features in a Rails 8.1 application that serves real customer traffic Take ownership of key areas of the platform, from design through to production Contribute to architecture decisions, code reviews and technical planning together with the team Improve the reliability, performance and maintainability of the platform, including refactoring legacy parts where it pays off Support deployments, monitoring and production troubleshooting across the current environments Build and maintain integrations with third-party travel suppliers and internal services Promote solid engineering practices: automated testing, CI/CD, clear documentation, sensible upgrade paths Partner with product and business stakeholders to turn requirements into well-scoped technical solutions 5+ years of commercial experience with Ruby Strong, hands-on experience with Ruby on Rails in production, including recent versions (Rails 7/8) Hands-on experience with Google Cloud Platform (GCP), ideally including running Rails applications on it Solid knowledge of relational databases and SQL (e.g. PostgreSQL or MySQL) Experience writing automated tests with RSpec or Minitest A proactive, ownership-driven approach and the ability to work autonomously Upper-Intermediate English or higher Experience migrating applications from on-premise infrastructure to the cloud Experience in travel, e-commerce or booking platforms Experience with background job processing (Sidekiq, Solid Queue) and caching (Redis, Solid Cache) Hotwire (Turbo/Stimulus) on the frontend Experience upgrading Rails applications across major versions Docker and infrastructure as code (Terraform) on GCP Experience integrating with external APIs (suppliers, payment providers); Experience mentoring or onboarding other engineers