what do programmers do

Job responsibilities of programmers: 1. Responsible for the detailed design, coding and organization and implementation of internal testing of software projects; 2. Assist project managers and related personnel to communicate with customers and maintain good customer relationships; 3. Participate in demand research, project feasibility analysis, technical feasibility analysis and demand analysis; 4. Be familiar with and master the relevant software technologies for delivering software projects developed by the software department; 5. Responsible for providing timely feedback to the project manager on the status of software development; 6 , Participate in the solution of major technical problems in the software development and maintenance process; 7. Responsible for the formulation of relevant technical documents, etc.

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

　Programmer (English Programmer) is a professional engaged in program development and program maintenance. Programmers are generally divided into program designers and program coders, but the boundaries between the two are not very clear, especially in China. Software practitioners are divided into six categories: junior programmers, intermediate programmers, senior programmers (now software designers), system analysts, system architects, and test engineers.

The specific job responsibilities are as follows:

1. Responsible for the detailed design, coding and organization and implementation of internal testing of software projects, and concurrently perform system analysis work on small software projects to complete Assign project implementation and technical support work.

2. Assist project managers and related personnel to communicate with customers and maintain good customer relationships.

3. Participate in demand research, project feasibility analysis, technical feasibility analysis and demand analysis.

4. Be familiar with and master the relevant software technologies for delivering software projects developed by the software department.

5. Responsible for providing timely feedback to the project manager on the software development situation and making suggestions for improvement based on the actual situation.

6. Participate in the solution of major technical problems in the software development and maintenance process, and participate in the first software installation and debugging, data cutover, user training and project promotion.

7. Responsible for the formulation of relevant technical documents.

8. Responsible for the technological development trends in the business field.

Explanation:

Although the specific internal division of labor is different, the group of programmers, through the division of labor and collaboration of each person, combines the company boss, product manager, The functional ideas of operations and business departments for an APP, mini-program, etc. product are realized through programming.

Of course, it is not just APPs and small programs that require programming, but since we are positioned to answer this question for novices, let us take the example of functional development of APPs that everyone uses to illustrate how programmers work!

• 01 Front-end development: Mainly responsible for the implementation of user-visible pages

When we open any APP, we will see a startup page, click Each module, function, title, etc. inside will pop up on another page.

In Internet companies, in addition to programmers, there are also positions such as product managers, interaction designers, and UI designers. Generally speaking, interaction designers and UI designers will be based on the boss’s ideas for the APP and the product manager’s opinions on the app. The planning of the APP-related modules determines what each page will look like, such as whether there will be one button or three, whether it will be arranged up and down or left and right, etc.

To be able to realize that each of our users can jump to the "My" home page by clicking "My" on the home page, this requires programmers, brothers and sisters to implement it through programs. .

Programmers who are usually mainly responsible for similar work are usually called front-end developers in terms of internal division of labor.

• 02 Back-end development: Mainly responsible for the development of back-end data

Whether we are novices or not, there is a high probability that we have heard of databases the concept of.

This is like when we go shopping in a supermarket. The colorful products we can see on the shelves and displayed in a way that makes people want to buy them are the front end of an APP. For example, if you want to buy a pack of cucumber-flavored products, Potato chips (many people's favorite), but you find that there are only a few other flavors on the shelf. At this time, you ask the clerk if there is any cucumber flavor?

The tallyman will go to the warehouse manager to look at the warehouse, and if there is anything left, he will take it out to you.

Invisible to you, the tally clerks, warehouse managers and the warehouse itself are somewhat similar to what the back-end development of the APP we use is doing. They have to ensure the orderliness of the database and ensure the orderliness of the database when needed. The data you want can be found quickly and accurately, and the front-end needs can be responded to quickly and accurately.

• 03 Testing: Mainly responsible for quality control before product launch

When development engineers put the APP After the development of , small programs, etc. is completed, internal quality supervisors, that is, test engineers, are required to test the overall performance and safety of the product before it is officially launched.

The most basic testing work includes functional testing, that is, test engineers can use the product as a novice user to see whether the product can respond smoothly and realize their needs;

The second important test is the test of product compatibility. Whether there are any problems with compatibility between different models of mobile devices and different software.

The third is the performance test, which mainly depends on whether the product can run normally without crashing under the premise of large traffic;

The last is the security test to prevent the product from being maliciously attacked after it goes online.

Expand knowledge: essential skills for programmers

Proficient in development tools

As a A programmer is proficient in the use of at least two to three development tools, which is the foundation of a programmer. Among them, C/C and JAVA are the most recommended development tools. C/C has become the most popular development tool due to its high efficiency and high flexibility. A powerful tool among development tools, many system-level software are still written in C/C. JAVA's cross-platform and good integration with WEB are the advantages of JAVA, and JAVA, its related technology set JAVAOne, is likely to become one of the mainstream development tools in the future. Secondly, it would be better to master a simple visual development tool, such as VB, PowerBuilder, Delphi, CBuilder. These development tools reduce the difficulty of development and can strengthen the concept of the programmer's object model. In addition, you need to master basic scripting languages, such as shell, perl, etc., and at least be able to read these script codes.

Know the database

Why is the database so important? As programmers, they naturally have their own reasons: many applications are centered on database data, and there are many database products. Among them, relational databases are still the mainstream form, so programmers are proficient in at least one or two databases. , you must be very clear about the key elements of relational databases, and you must be proficient in the basic syntax of SQL. Although many database products provide visual database management tools, SQL is the foundation and the universal database operation method. If you do not have access to commercial database systems, it is a good choice to use free database products, such as mySQL, Postgres, etc.

Understand the operating system

The current mainstream operating systems are Windows, Linux/Unix, and proficiency in using these operating systems is necessary, but these are not enough. . To become a true programming master, you need to have an in-depth understanding of the operating system, its memory management mechanism, process/thread scheduling, signals, kernel objects, system calls, protocol stack implementation, etc. As an operating system for developing source code, Linux is a good learning platform. Linux has almost all the characteristics of modern operating systems. Although there is less information on the kernel implementation mechanism of Windows systems, a lot of information can still be obtained through the Internet.

Understand the network protocol TCP/IP

Today, when the Internet is so popular, if you don’t have a good grasp of the Internet’s supporting protocol TCP/IP protocol stack , you need to catch up on this lesson quickly. Network technology has changed the mode of software operation. From the earliest client/server structure, to today's WEBServices, to future grid computing, all of this is inseparable from TCP/ IP protocol stack-based network protocol support, it is very necessary to have an in-depth understanding of the TCP/IP protocol. At least, you need to understand the ISO seven-layer protocol model, the principles of common protocols such as IP/UDP/TCP/HTTP, and the three-way handshake mechanism.

Understand the significance of the existence of DCOM/CORBA/XML/WEBServices

With the development of technology, the seamless integration of software and network is an inevitable trend, and the position of software systems Irrelevance is one of the important features of future computing models. DCOM/CORBA is an intermediate platform for the two current mainstream distributed computing. DCOM is an extension of Microsoft COM (Component Object Model), and CORBA is a specification supported by OMG. The importance of XML/WebServices is self-evident. XML is known as the "Esperanto" on the Internet with its structured representation method and super expressive ability, and is one of the cornerstones of distributed computing.

Don’t separate software engineering from CMM

In the development of large-scale software systems, engineering development control replaces personal heroism and becomes the guarantee for the success of the software system. A programming master is not necessarily an excellent programmer. An excellent programmer combines excellent programming ability and development skills with strict software engineering thinking. Programming is only one part of the software life cycle. An excellent programmer Basic skills at each stage of software development should be mastered, such as market analysis, feasibility analysis, requirements analysis, structural design, detailed design, software testing, etc.

Requirements understanding ability

Programmers must be able to correctly understand the requirements described in the task order. It should be clear here that programmers should not only pay attention to the functional requirements of the software, but also pay attention to the performance requirements of the software. They must be able to correctly evaluate the impact and potential threats of their modules on the entire project. If there are two to three years If a skilled programmer with project experience does not understand this, it can only mean that he may have worked seriously, but not with heart.

Modular thinking ability

As an excellent programmer, his thinking cannot be limited to the current work tasks. He must think about whether the modules he writes can be separated from the current work tasks. The system exists and can be used directly in other systems or other modules through simple encapsulation. This can make the code reusable, reduce duplication of labor, and make the system structure more reasonable. The improvement of modular thinking ability is an important indicator of the improvement of a programmer's technical level.

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