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Include any experience, even voluntary, that you have designing and programming for websites or apps.   It is important that you are honest when developing your CV. Don't include false experience or exaggerate. Steer clear of industry jargon and buzzwords. Present clearly what your experience is with out using words such as "synergy" or "creative". Include testimonials of your work and links to code or websites you have developed. Have a friend or colleague review your CV before you apply to jobs. Put your CV online after it has been completed or updated. Try using sites like LinkedIn or Career 2.0. Ask any industry connections you have to look at your CV to see if they know of any opportunities. An online presence for a web developer is vital to a successful career.   Put out a side project onto collaborative sites like GitHub. Contribute to open sourced projects on GitHub and similar websites. A prospective employer who sees that a candidate works with others on a web project in their spare time will be an attractive potential employee. Put your highest quality code on your online profiles. Once you have written some code or contributed to a project, you can put this on your CV. You could also start a blog about projects you are working on or trends in web development. Put a link to this on you CV. Potential employers will often look to see if a candidate is keeping up to date on trends and projects in the field. Especially if you are contacted by a recruiter or have applied to a specific job, it is important to know the ins and outs of a company.  Know how long a company has been in operation. Make sure you understand the goals and mission of the company. Become familiar with the companies products or services. A potential employer won't want to interview someone who clearly does not know what his company does or how they operate. Many companies will want you to take a technical competency test before or after an interview.  Take this seriously, even if the task seems trivial. Companies will want to see if you can code in a particular language or develop a specific type of website. Put as much effort into the exam as you can. You will want to make sure you don't have any errors in your code and that it compiles correctly. Use an online test to deploy your code for the test. This will show a potential employer that you know how to deploy code you have written. Do some of your own research about the company climate.  You should try to deduce what the company dress code is, the hours required, and if you will need to travel. Arrive 15 minutes early for an interview. This will show you are punctual and have time management skills. Prepare several questions of your own to ask an interviewer. You should ask questions about the work environment, company culture, what types of projects you will be expected to work on etc. Going to an interview with questions about the job is a good indicator to an employer that you have thought carefully about the interview and the job. Avoid common interview pitfalls. Don't ask about salary or badmouth past employers and colleagues. Don't exaggerate your experience when asked about projects you have worked on.
Prepare and update your curriculum vitae or resume. Put some of the code you have written online. Research tech companies. Spend time on technical tests. Go to any interviews prepared.