I have been working as a junior developer for almost four years, and my duties included to createing databases and storeing procedures. I have been working as a junior developer for almost four years, and my duties include creating databases and storing procedures.

Currently, my company is collaborating with "company name," and I was selected withalong with two others two coworkers for weto help them. Currently, my company is collaborating with "company name," and I was selected along with two other coworkers to help them.

Also, Mmy company haves collaborated with others companies where I was selected as well, for example "company name" in "city" and "company name" in "city" Also, my company has collaborated with others companies where I was selected as well, for example "company name" in "city" and "company name" in "city"

Company is a singular word, so it should be "company has."

I've always been interestinged in development software and c. Currently I am doing an online course about fFlutter and also I am improving my english. I've always been interested in development software. Currently I am doing an online course about Flutter and am improving my english.

Use "an" instead of "a" when the next word starts with a vowel. "Flutter" should be capitalized if it's a proper noun.