Backend Developer (Ruby) - Mid-Level to $4600

Backend Developer (Ruby on Rails, APIs) - Mid-Level

We’re hiring a mid-level Backend Developer (Ruby on Rails) to join our on-site team in Kyiv. You’ll work on U.S.based products, building and scaling API-driven backend services, and collaborating closely with experienced engineers and product teams.

⚠️ Important

• On-site / Hybrid UKRAINE Only

What You’ll Do

• Build and maintain RESTful APIs using Ruby on Rails
• Implement business logic, authentication, and third-party integrations
• Design and optimize relational database schemas and queries (PostgreSQL / MySQL)
• Collaborate with frontend, mobile, and product teams
• Write clean, maintainable, well-tested code following Rails best practices
• Create and maintain unit and integration tests
• Work with CI/CD pipelines and automated testing
• Participate in code reviews and iterative delivery

What We’re Looking For

• 3+ years of commercial experience with Ruby on Rails
• Hands-on experience building API-first applications
• Solid understanding of REST, JSON, JWT authentication
• Strong knowledge of ActiveRecord and relational databases (Postgres or MySQL)
• Experience with RSpec (unit, request, integration tests)
• Comfortable with Git workflows and Agile teams
• Practical experience using Postman, Swagger, or similar API tools
• Familiarity with background jobs (Sidekiq / ActiveJob)
• Pragmatic mindset — focus on shipping value, not over-engineering
• Willingness to learn and improve with team support

Nice to Have

• Experience with service-oriented architectures or microservices
• Exposure to API performance optimization and caching
• Familiarity with Docker (Kubernetes is a plus)
• Interest in or basic exposure to Go / Golang

What You’ll Get

• On-site Kyiv team with strong engineering culture
• Free on-site parking
• Daily lunches, snacks, drinks
• Performance-based bonuses
• Work on real, high-impact U.S. products
• Clear growth path as the product and team scale