Yes there are. After 12th, following are the diplomas you can consider in software engineering:

• Diploma of Software Development
• Diploma of Software Engineering
• Diploma in Software Engineering Technician
• International Diploma in Software Development
• Diploma in Mobile App Development
• Software Testing and Quality Assurance

Few institutes which provide diploma in software engineering are:

• Fortune Institute of Management and Technology
• Techware Institute of Technology
• IICT

Good Luck.