How much experience must one have to land a computer science job?
It all depends upon many factors, but the most important thing for you to do as you consider this wide ranging career field is to determine in which area of application your personality traits most match with others in that area and then to talk with people who are working in that area to see what they do, how they got there, and what advice and suggestions and they might have for you.
Getting to know yourself and how your personality traits relate to people involved in various career opportunities is very important in your decision making process. During my many years in Human Resources and College Recruiting, I ran across too many students who had skipped this very important step and ended up in a job situation which for which they were not well suited. Selecting a career area is like buying a pair of shoes. First you have to be properly fitted for the correct size, and then you need to try on and walk in the various shoe options to determine which is fits the best and is most comfortable for you to wear. Following are some important steps which I developed during my career which have been helpful to many .
Ken recommends the following next steps:
I agree with Ken's answer below. It's important to fully think through your goals and feel confident in understanding your strengths and weaknesses. I worked about two years before I got my MBA part time (while working full time). I found that applying the concepts I was learning as part of my Master's program was really helpful. I would highly recommend taking time to get real world experience before you pursue your Master's degree. This will ensure you are committed to that field and it will also help with perspective as you go through Master's courses. In addition, you may find that you don't need the Master's degree for the career you desire. Overall, I have never seen someone not get a job because they did not have a Master's degree.