While there isn’t a one-size-fits-all answer, learning a widely-used and versatile programming language can significantly boost your chances of landing a software job.

1. Python: Known for its simplicity and versatility, Python is used in web development, data analysis, machine learning, and more.

2. JavaScript: Essential for web development, both on the client-side (front-end) and server-side (using Node.js).

3. Java: A staple in enterprise environments, Android development, and large-scale systems.

4. C++: Valuable for high-performance applications, game development, and system-level programming.

5. SQL: Important for database management, which is crucial for many software development roles.

Focusing on one of these languages, particularly Python or JavaScript, can be a strong foundation.