Senior Backend Fastify Engineer

We are looking for a Senior Backend Engineer specialized in and TypeScript to support the development of APIs orchestration services workers and integrations for a robotics and AI SaaS platform.

• Design and develop backend services using TypeScript and .
• Build and maintain APIs using Fastify.
• Develop domain-specific route plugins and services.
• Implement business logic as reusable and testable functions.
• Work directly with PostgreSQL using parameterized SQL queries.
• Design efficient database queries and data access patterns.
• Develop background workers and asynchronous processes.
• Implement orchestration and scheduling logic.
• Integrate external APIs and robotics platforms.
• Implement authentication authorization and tenant-scoping mechanisms.
• Diagnose and resolve production issues.
• Participate in architecture and code reviews.
• Optimize API and database performance.

• 5 years of backend development experience.
• Strong TypeScript and experience.
• Strong REST API development experience.
• Strong PostgreSQL and SQL skills.
• Experience with Fastify or comparable frameworks.
• Strong understanding of asynchronous programming.
• Experience designing scalable backend systems.
• Experience working with external APIs.
• Strong understanding of security and authentication.
• Strong written and verbal communication skills in English.
• Fluent conversational and written English is required.
• Ability to communicate directly with U.S.-based clients and engineering teams.

• Fastify 5.
• Supabase.
• node-postgres.
• Worker/background processing architectures.
• Robotics/IoT integrations.
• Event-driven architectures.
• AI/LLM integrations.
• MCP.

• Flexible hourly work arrangement.
• Work on challenging U.S.-based technology projects.
• Opportunity for ongoing collaboration based on project demand.
• Exposure to modern technologies and complex software products.
• Remote work and flexible scheduling.
• Competitive hourly compensation based on experience and technical expertise.