Full-stack developer (Ruby/React)

[Summary] A leading collaborative design platform is seeking an experienced backend-focused engineer to enhance and evolve an integration-driven application. The project is centered on building and maintaining robust integrations using Ruby on Rails and TypeScript, with a strong emphasis on designing, implementing, and scaling connections with third-party systems. The role will contribute to improving reliability, extensibility, and overall integration architecture across the platform. [General information] They are looking for a senior-level engineer with strong experience in Ruby on Rails and TypeScript, and a proven background in building and maintaining complex integrations. The ideal candidate is comfortable working with multiple external APIs, designing integration workflows, and collaborating closely with product and engineering teams. [Task and Deliverables] Design, develop, and maintain backend services using Ruby on Rails to support integrations. Build and extend integration logic using TypeScript, ensuring reliability and scalability. Integrate the platform with third-party APIs and external systems. Collaborate with internal teams to define integration requirements and technical solutions. Improve existing integration architecture with a focus on maintainability, performance, and observability. Document integration flows and provide technical recommendations for future improvements. [Engagement highlights] Opportunity to work on high-impact integrations used by thousands of end users. Collaborative environment with experienced engineers. Potential for long-term collaboration based on performance and project outcomes. [Required Experience] Strong experience with Ruby on Rails in production environments. Experience with TypeScript. Proven background building and maintaining integrations with third-party APIs. Solid understanding of RESTful APIs, webhooks, and asynchronous workflows. Experience working in collaborative, cross-functional engineering teams. Experience integrating identity services, especially using OAuth. [Nice to have] Hands-on experience with Google APIs (Calendar, Chat, etc.) and app integrations. Familiarity with MCP (Model Context Protocol) . Prior experience building integrations for SaaS or productivity tools.