Senior Ruby on Rails Engineer in atEnbi

atEnbi’s a Poland-based boutique software agency all about Japan-focused TravelTech. We’re a tight-knit, distributed crew working hand-in-hand with our UK client to scale two high-impact platforms. With just a few of us, everyone’s on first-name terms, and collaboration—whether it’s about code, architecture or even weekend plans—is always just a chat away. We care about shipping clean, solid code and building systems that stay easy to maintain and scale, and we’re in it for the long haul, continually evolving our products with the latest tech in a friendly, international team setting.

• Develop our hotel‑booking platform powered by a Japanese partner’s API or Japanese ticket selling platform(not two at the same time).
• Design and build scalable, reliable Ruby on Rails applications.
• Extend the codebase (with guidance from the senior engineer ).
• Develop and maintain API integrations.
• Take an active role in architectural decisions—you’ll directly shape the system’s future.
• Maintain the CI/CD pipeline and staging/production environments.
• Skills in performance profiling to identify and resolve application bottlenecks.

The ideal candidate thrives in collaborative, remote team settings, demonstrates leadership in technical decision-making, and exhibits a proactive attitude towards continuous improvement and mentoring.

• 5+ years of professional Ruby on Rails experience with a CS degree
• Strong command of Ruby 3.2 LTS and Rails 7.1 (currently on Rails 6.1; migration planned)
• Proficiency with Node.js 20 LTS and Yarn (Next.js build pipeline)
• PostgreSQL 14 with the PostGIS extension
• Redis/Sidekiq for caching and background jobs
• Front-end skills: JavaScript (ES6+), HTML5, CSS3, Tailwind CSS and HOTWIRE (Turbo/Stimulus).
• Experience with containerisation (Docker) and CI/CD (GitHub Actions, blue-green deployments)
• Familiarity with AWS/GCP cloud environments
• Testing mindset: RSpec, FactoryBot, Jest / Playwright
• Exposure to API integrations and third-party services
• Proven ability to mentor and lead development projects
• Passion for clean, maintainable code (SOLID, DRY) and modern security practices (OWASP Top 10, PCI-DSS)

• Experience with GraphQL schema design and query optimization.
• Knowledge of event sourcing architectural patterns to manage state changes effectively.
• Experience deploying and managing Kubernetes clusters (k8s) for container orchestration.
• Experience with monitoring/logging tools (Datadog, Sentry, New Relic)
• Knowledge of accessibility (a11y) best practices
• Understanding of internationalization (i18n) and localization workflows
• Exposure to Test-Driven Development (TDD) beyond basics
• React.js

• Competitive hourly compensation, billed monthly through Wise or any chosen bank account, on a stable 6-month renewable contract, with a loyalty bonus at the end. Ideally we look for a longterm commitment and growth with us as a company.
• Fully remote work setup with core collaborative hours overlapping between 12:00 to 19:00 CET (07:00 to 14:00 ART), providing flexibility and work-life balance.
• MacBook allowance or Bring Your Own Device stipend to ensure optimal personal work environments.
• Close-knit team: everyone’s on a first-name basis and collaboration is just a chat away
• Long-term project focus: no constant context-switching-own your module over time
• Flexible work: work remotely.
• Impact: your contributions will directly shape both product and process