Lead Full-Stack Ruby Engineer

Must Have:

• Strong commercial experience with Ruby (Rails) and React.
• Hands-on experience building and maintaining microservice-based systems.
• Ability to trace how data flows between services: message queues / event streams, third-party integrations, data warehouses.
• Proactive ownership: looks beyond the assigned ticket, understands the project as a system and how neighboring services fit together.
• Comfortable in a fast-paced environment - able to context-switch across several tickets and keep progress moving when one is blocked.
• Able to ask the right questions and surface risks or gaps early rather than waiting for direction.
• Upper-intermediate+ level of English.

Nice to Have:

• Direct experience with Kafka (or another event-streaming platform: RabbitMQ, SQS/SNS, Pub/Sub).
• Experience with Snowflake or a comparable analytical data warehouse (BigQuery, Redshift).
• Experience integrating and debugging external/third-party APIs at scale.
• Experience with observability tooling for cross-service debugging (distributed tracing, centralized logging).
• Exposure to service decomposition or migrating a monolith to microservices.

Key Responsibilities:

• Design, build, and maintain full-stack applications, including backend services, APIs, and user-facing web interfaces.
• Develop backend systems using Ruby on Rails; build responsive user interfaces using JavaScript/TypeScript.
• Ensure high performance, security, scalability, and maintainability across the entire application stack.
• Collaborate closely with other developers, designers, and product teams to deliver end-to-end solutions.
• Provide guidance and advice to other team members.
• Conduct code reviews and provide guidance to system architecture and technical design across backend and frontend.
• Continuously improving development processes, system performance, and developer experience across the stack.
• Maintaining technical communication with the client, particularly with their technical counterparts, and contribute to architecture-related discussions and decisions.