Computer programmers write and test code that allows computer applications and software programs to function properly. They turn the program designs created by software developers and engineers into instructions that a computer can follow. In addition, programmers test newly created applications and programs to ensure that they produce the expected results. If they do not work correctly, computer programmers check the code for mistakes and fix them.
Computer programmers typically do the following:
- Write programs in a variety of computer languages, such as C++ and Java
- Update and expand existing programs
- Test programs for errors and fix the faulty lines of computer code responsible
- Create and test code in an integrated development environment (IDE)
- Use code libraries, which are collections of independent lines of code, to simplify the writing
Programmers work closely with software developers, and in some businesses their duties overlap. When such overlap occurs, programmers can do work that is typical of developers, such as designing the program. Program design entails planning the software initially, creating models and flowcharts detailing how the code is to be written, writing and debugging code, and designing an application or systems interface. Programmers often use an IDE, which allows them to create, edit, and test code.
A program’s purpose determines the complexity of its computer code. For example, a weather application for a mobile device will require less programming than a social-networking application. Simpler programs can be written in less time. Complex programs, such as computer operating systems, can take a year or more to complete.
Software-as-a-service (SaaS), which consists of applications provided through the Internet, is a growing field. Although programmers typically need to rewrite their programs to work on different system platforms, such as Windows or OS X, applications created with SaaS work on all platforms. Accordingly, programmers writing SaaS applications may not have to rewrite as much code as other programmers do and can instead spend more time writing new programs.
Computer programmers held about 328, 600 jobs in 2014. The industries that employed the most computer programmers were as follows:
|Computer systems design and related services||38%|
|Finance and insurance|
|Administrative and support services|
Programmers normally work alone, but sometimes work with other computer specialists on large projects. Because writing code can be done anywhere, many programmers telecommute.
Most computer programmers work full time.
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Most computer programmers have a bachelor’s degree in computer science or a related subject; however, some employers hire workers with an associate’s degree. Most programmers specialize in a few programming languages.
Most computer programmers have a bachelor’s degree; however, some employers hire workers who have an associate’s degree. Most programmers get a degree in computer science or a related subject. Programmers who work in specific fields, such as healthcare or accounting, may take classes in that field to supplement their degree in computer programming. In addition, employers value experience, which many students gain through internships.
Most programmers learn a few computer languages while in school. However, a computer science degree gives students the skills needed to learn new computer languages easily. During their classes, students receive hands-on experience writing code, testing programs, fixing errors, and doing many other tasks that they will perform on the job.
To keep up with changing technology, computer programmers may take continuing education and professional development seminars to learn new programming languages or about upgrades to programming languages they already know.
Licenses, Certifications, and Registrations
Programmers can become certified in specific programming languages or for vendor-specific programming products. Some companies require their computer programmers to be certified in the products they use.
Many students gain experience in computer programming by completing an internship at a software company while in college.
Programmers who have general business experience may become computer systems analysts. With experience, some programmers may become software developers. They may also be promoted to managerial positions. For more information, see the profiles on computer systems analysts, software developers, and computer and information systems managers.