Self Introduction

hello, my name is kim jinsu.

-> Hello! My name is Kim Jinsu. (Make sure to start your sentences and your name with CAPITAL LETTERS.)

i’m 30 years old(i’m in my early 30’s-thirties) I have been working at samsung SDS in system integration department since 2011.

-> I am 30 years old. (I'm in my early 30's.) I have been working at Samsung SDS in the system integration departmetn since 2001. (You can remove the word "thirties" since you already have the number.

as a web program engineer, I have been operating the national electronic procurement system for 2 years.

-> As a web engineer, I have been operating the national electronic procurement system for 2 years. (Capital letter in starting your sentences.)

I like my job for now, but I really want to do is run my own business. so I put effort into learning about management and other languages.

-> I like my job for now but I really want to run my own business, so I put effort into learning management and other languages. (Use a comma instead of a period before the word "so".)

i’m an outgoing person who has a positive attitude.

-> I'm an outgoing person who has a positive attitude. (Capital letter in starting your sentences.)

I also have a good sense of humor. so I often hear people call me interesting(funny) in my spare(free) time, I like to watch movies.

-> I also have a good sense of humor, so I often hear people call me interesting (funny).  In my spare (free) time, I like to watch movies. (Capital letter in starting your sentences.  Use period instead of comma after the word funny since your will be talking about a different topic. )