To join Indian Air-Force, you may appear for CDS exam conducted by UPSC.

The minimum educational qualification required is a degree (with Physics and Maths at +2 level) or Bachelor of Engineering.

If you have completed your B.Sc/BE/BTech with a minimum of 60% marks and have studied Physics and Mathematics at 10+2 level, you can apply for Flying (Pilot) through Short Service Commission.
The age limit for the same is 19-23 years.

You may also apply in the technical department as an aeronautical engineer. provided you have studied a minimum of eight subject from the following list.

For aeronautical engineer(electronics)

(1) Physics / Engineering Physics.
(2) Mathematics / Engineering Mathematics.
(3) Engineering Graphics / Engineering Drawing.
(4) Electrical Engineering / Electrical Technology.
(5) Control Engineering.
(6) Microprocessors.
(7) Digital Electronics / Basic Electronics.
(8) Computer Networks.
(9) Information Technology.
(10) Network Theory Design.
(11) Telecommunication Systems.
(12) Electronic Circuit Design.
(13) Radar Theory.
(14) Switching Theory.
(15) Instrumentation.
(16) Microwave Engineering.
(17) Antenna and Wave Propagation.
(18) Electronic Devices

For Aeronautical engineer(Mechanical)

(1) Physics / Engineering Physics.
(2) Engineering Maths / Mathematics.
(3) Engineering Drawing / Graphics.
(4) Automotive Engineering / Plant Engineering / Industrial Engineering.
(5) Engineering Mechanics / Strength of Material.
(6) Aerodynamics.
(7) Thermodynamics and Applications / Heat Power Engineering.
(8) Heat and Mass Transfer.
(9) Theory of Machines (Kinematics and Dynamics of Machinery).
(10) Fluid Mechanics / Turbo Machines.
(11) Flight Mechanics.
(12) Machine Drawing / Machine Design.
(13) Mechatronics.
(14) Material Science / Metallurgy.
(15) Vibrations.
(16) Workshop Technology / Manufacturing Technology / Production Engineering.
(17) Hydraulics and Pneumatics.
(18) Aircraft Structures

The age limit to apply for the same is 18-28 years.