The ideal T-shaped skills combination for software developers includes:

*Vertical Bar (Depth):*

1. Programming languages (e.g., Java, Python, JavaScript)
2. Software development methodologies (e.g., Agile, Scrum)
3. Data structures and algorithms
4. Database management systems (e.g., relational, NoSQL)
5. Operating Systems (e.g., Windows, Linux)

*Horizontal Bar (Breadth):*

1. Communication and teamwork
2. Problem-solving and analytical thinking
3. Adaptability and continuous learning
4. User experience (UX) and user interface (UI) design principles
5. DevOps and continuous integration/continuous deployment (CI/CD)
6. Cloud computing (e.g., AWS, Azure, Google Cloud)
7. Cybersecurity fundamentals
8. Data analysis and visualization
9. Machine learning and artificial intelligence (AI) basics
10. Business acumen and domain knowledge

*Soft Skills:*

1. Time management and prioritization
2. Conflict resolution and negotiation
3. Leadership and mentoring
4. Public speaking and presentation
5. Emotional intelligence and empathy

*T-Shaped Skill Categories:*

1. *Generalist*: Strong horizontal skills, moderate vertical skills
2. *Specialist*: Deep vertical skills, limited horizontal skills
3. *Polymath*: Balanced vertical and horizontal skills

*Benefits of T-Shaped Skills:*

1. Versatility and adaptability
2. Effective collaboration and communication
3. Innovative problem-solving
4. Leadership potential
5. Enhanced career prospects

*Developing T-Shaped Skills:*

1. Online courses and tutorials (e.g., Coursera, Udemy)
2. Industry conferences and meetups
3. Mentorship and peer feedback
4. Personal projects and contributions to open-source software
5. Continuous learning and self-improvement

By combining depth in a specific area with breadth across multiple disciplines, software developers can become more effective, adaptable, and valuable to their organizations.

Example of T-Shaped Skills for specific roles:

1. Front-end Developer: JavaScript, HTML/CSS, React/Angular, UX/UI design
2. Back-end Developer: Java/Python, Spring/Django, database management, API design
3. Full-stack Developer: Combination of front-end and back-end skills

Keep in mind that T-Shaped Skills are not limited to software development and can apply to various professions.