Design, develop, and maintain scalable backend services and RESTful APIs using Python and Flask . Build robust API architectures that support high-performance, secure, and maintainable applications. Develop and optimize PostgreSQL database schemas , ensuring data integrity, scalability, and performance. Write hand-crafted, optimized SQL queries for analytics, reporting, and business insights. Analyze and improve database performance through indexing, query optimization, and tuning . Implement backend business logic, validations, authentication, and authorization mechanisms. Collaborate with frontend engineers to define API contracts and ensure smooth React.js integration . Support frontend teams by enabling efficient data flows for dashboards and UI components. Debug, troubleshoot, and resolve backend issues across development, staging, and production environments. Write clean, maintainable, and well-documented code following best engineering practices. Participate ...