Yes, airlines do hire B.Tech Aeronautical Engineers.
Aeronautical Engineers with a B.Tech degree typically have a strong understanding of the fundamental principles of aerospace engineering, which can be applied in various roles within the airline industry. Some of the roles that a B.Tech aeronautical engineer can be involved in include:
Design and development: B.Tech Aeronautical Engineers can be involved in designing and developing new aircraft, as well as modifying existing ones.
Maintenance, repair, and overhaul: B.Tech Aeronautical Engineers can be involved in maintaining, repairing, and overhauling aircraft and systems, ensuring that they are safe and reliable.
Quality assurance: B.Tech Aeronautical Engineers may be involved in ensuring that aircraft and systems meet the required safety and quality standards.
Flight testing: B.Tech Aeronautical Engineers may be involved in flight testing new aircraft and systems, and in certifying that they meet safety and performance requirements.
Research and development: B.Tech Aeronautical Engineers may work in research and development, developing new technologies and systems that can be used in future aircraft.
Its also worth noting that, B.Tech Aeronautical Engineers can also work in other related industry such as aerospace manufacturing, defence and space agencies, research institutions, consulting firms and government organizations.
Its also worth noting that while some airlines may hire B.Tech Aeronautical Engineers directly, others may prefer to hire engineers with a Masters degree or a Ph.D. in aerospace engineering.