An official employment notification has been released by the Indian government, calling out for candidates to apply for Constable post in Border Security Force.
Candidates who would like to apply for Constable (Tradesmen) (Male) should have passed matriculation or equivalent from a recognized university and 2 year experience in respective trade or 1 year certificate from industrial training institute of vocational institute or 2 year diploma from industrial training institute in the trades of similar trades.

18 to 23 as on 1st August 2017 and upper age is relaxed by 5 years for SC/ST, 3 years for OBC
Rs 5200 - 20200/- Per Month
Applicants may apply in prescribed application form along with self attested copies of relevant documents, three recent passport size photograph & two self addressed envelopes with envelope of size 25 X 12 cm with postal stamp worth Rs 40/- each send to the relevant centers as per official notification on or before 30 days.
http://bsf.nic.in/doc/recruitment/r61.pdf