I will design nodejs backend systems and sql databases

Professional system development services using Node.js and SQL Server, focused on building scalable, secure, and high-performance systems. This gig covers REST API development, debugging, SQL query optimization, stored procedures, and backend architecture design for production-grade applications.

Services include creation and fixing of Node.js APIs, SQL Server integration, database design, performance tuning, authentication and authorization, and optimization of existing backend systems. Emphasis is placed on clean architecture, modular design, and maintainable code.

All solutions follow industry best practices including secure coding, input validation, error handling, and SQL injection prevention. Databases are optimized using efficient queries, indexing strategies, and structured relational design to ensure high performance and reliability.

This service is suitable for building new backend systems, improving existing APIs, resolving critical issues, and enhancing database performance in enterprise and fintech environments.

Deliverables include clean, structured source code, scalable architecture, and optional documentation with focus is on reliability and timely delivery.