Other than DSA, what technical skills should I learn for hackathons that are also valuable for placements and future career growth in the Indian software industry

I am a B. Tech 2nd year student. I want to know which technical skills (like web/app development, cloud, DevOps, system design, aiml etc.) are most useful for participating in hackathons. I also want these skills to help me with placements and long-term career growth in the Indian software/tech industry, apart from DSA