Lead Full-Stack Ruby Engineer

Accountabilities: Full-Stack Development: Design, develop, and maintain software applications using Ruby on Rails and React, ensuring high-quality implementation across the stack. Microservices Engineering: Build, support, and troubleshoot microservice-based systems, understanding how individual services interact within the broader platform. Data Flow and Integration: Trace data across services, message queues, event streams, third-party integrations, and analytical data warehouses to identify issues and ensure reliable information exchange. Technical Ownership: Take responsibility beyond individual tickets by understanding the wider system architecture, identifying dependencies, and considering how neighboring services affect overall functionality. Troubleshooting and Problem-Solving: Investigate cross-service issues, identify root causes, and keep work progressing when dependencies or blockers arise. Technical Decision-Making: Contribute to architectural and engineering discussions, raise potential risks and gaps early, and recommend practical solutions. Cross-Functional Collaboration: Work closely with client teams and other engineers in an embedded, long-term delivery environment, helping shape product direction and technical outcomes. Continuous Improvement: Identify opportunities to improve system reliability, observability, service boundaries, and engineering workflows as the platform evolves. Requirements: Professional Experience: At least 8 years of relevant professional experience, with strong commercial expertise in full-stack software engineering. Ruby on Rails: Extensive hands-on experience developing and maintaining applications using Ruby and the Rails framework. React: Strong commercial experience building and maintaining front-end applications with React. Microservices Architecture: Practical experience building, maintaining, and troubleshooting microservice-based systems. Systems Thinking: Ability to understand end-to-end data flows and dependencies across services, message queues, event streams, third-party integrations, and data warehouses. Ownership and Initiative: A proactive approach to engineering, with the ability to investigate problems independently, recognize dependencies, and take responsibility for outcomes beyond assigned tasks. Adaptability: Comfort working in a fast-paced environment, managing multiple tickets, reprioritizing work when necessary, and maintaining progress despite blockers. Communication: Ability to ask thoughtful questions, communicate technical risks clearly, and collaborate effectively with engineers and stakeholders. English Proficiency: Upper-intermediate English or higher. Additional Advantages: Experience with Kafka or other event-streaming technologies such as RabbitMQ, SQS/SNS, or Pub/Sub; Snowflake or comparable analytical data warehouses such as BigQuery or Redshift; large-scale third-party API integration and debugging; observability tools for distributed tracing and centralized logging; or service decomposition and monolith-to-microservices migrations. Benefits: Work Model: Fully remote, with the flexibility to work from the location that suits you best within the engagement arrangements. Contract Type: B2B contract. Working Hours: 9:00 a.m. to 5:00 p.m. Brazil Time (BRT). Flexible Time Off: A flexible policy allowing up to 40 unpaid days off per year; time away from work is encouraged. Professional Growth: Opportunities to develop your career in a growing organization and take on increasing technical responsibility. Technical Influence: Work with clients who value engineering input and involve engineers in architectural, technical, and product decisions. Meaningful Project: Contribute to a clinical trial data platform focused on improving data quality, reducing operational burdens, and supporting patient safety. Collaborative Culture: Participate in an environment that values diversity, inclusion, social engagement, and charitable initiatives. Benefits Exclusions: Paid time off, national holidays, medical insurance, and similar benefits are not included in the B2B compensation arrangement. Contractors are responsible for arranging their own benefits.