Senior Full-Stack Ruby Developer

About the Position

We are looking for an experienced Full-Stack Engineer to join EU-based Client’s Technical Team for the development of a new portal and extension of an existing backend platform. The portal will enable small and mid-sized businesses to book staffing services fully online, supporting the company’s transition to a scalable B2B self-service platform.

Responsibilities7

• Design, develop, and extend backend services using Ruby on Rails.
• Build and maintain scalable APIs supporting the new customer portal and mobile integrations.
• Improve and optimize PostgreSQL data models and database performance.
• Contribute to the evolution of a microservices-based architecture.
• Collaborate with frontend and mobile developers to support React Native integrations.
• Work with existing production systems, ensuring reliability, maintainability, and scalability.
• Support the development of performance-critical services where applicable.

Requirements12

• Strong backend development experience with Ruby on Rails.
• Experience designing and building REST APIs and backend integrations.
• Solid knowledge of PostgreSQL, including data modeling and performance optimization.
• Experience working with scalable system architectures.
• Ability to work with and extend existing production systems.
• Experience with Git / GitHub workflows.
• Familiarity with AWS-based infrastructure.
• Upper-Intermediate English and better.
• Experience with React, React Native (good to have).
• Knowledge of TypeScript / JavaScript (good to have).
• Experience building or integrating microservices (good to have).
• Experience with Rust or C++ for performance-critical processing (good to have).

Benefits15

• Competitive salary with the regular review.
• Medical Insurance after 3 months probation period (can be used in Ukraine).
• Vacation (up to 20 working days).
• Sick leaves (10 working days).
• National Holidays as a time off (11 days).
• Online English courses.
• Accountant assistance and legal support.
• Flexible working schedule, remote, office-based or hybrid format.
• Fully-equipped office space located in the city center (ready for work in blackouts).
• Direct cooperation with the customer.
• Dynamic environment with low level of bureaucracy and great team spirit.
• Challenging projects in diverse business domains and a variety of tech stacks.
• Communication with Top/Senior level specialists to strengthen your hard skills.
• Online/offline teambuildings.
• Volunteering culture development and support.