Custom Data Entry Software Development

I need custom data entry software to handle mixed data types (text, numerical, and other formats). The primary input will be from importing existing files, not manual entry or real-time feeds. Key Requirements: - Support for importing CSV, Excel, and JSON file formats - Privacy-oriented design and implementation Ideal skills and experience: - Experience in developing data entry software - Proficiency in handling mixed data types - Strong background in file import functionality, especially CSV, Excel, and JSON - Knowledge of privacy standards and implementation Looking for a reliable developer who can ensure data security while delivering a robust solution.