According to the Java Talent Inventory report released by 100 Offer, a high-end recruitment platform, Java remains the most popular technical language with the largest demand and demand for jobs in 2019.
On this basis, the recruitment demand for Java development in the Internet industry is also the largest supply and demand of technical positions in recent years, and the most stable change. In the 100 offer platform, the demand for Java engineers accounts for nearly 60% of the total demand. It can be said that under the background of “downsizing” of major companies, Java engineers, especially senior Java engineers, are still hard currency.
What makes a senior engineer and how does one become a senior Java engineer?
From the perspective of working time, senior engineers generally have 3-5 years of working experience. For Java engineers with 3-5 years of working experience, enterprises require solid algorithm foundation and programming ability, distributed and high concurrency experience is preferred, and can independently take charge of the development of a module. I am skilled in technology, not only writing Java well, but also learning and applying new technologies required by the company’s business by analogy. Take a senior Java development recruitment as an example:
From the job Posting above, you can see several information:
1. Even in this “downsizing” winter, companies are willing to pay for competent, senior Java engineers. There is no problem for an experienced programmer to get 50W +. There is also a popular opinion in IT circles that an excellent programmer is 10 times more efficient than an ordinary programmer. For innovative projects, enterprises would rather pay twice the salary to select one excellent programmer than hire two mediocre programmers at the same cost.
2. Focusing on specific skills, what are the expectations of senior programmers? Almost all recruitment requirements will mention: familiar with distributed systems, distributed system development experience is preferred.
The high threshold of distributed system is mainly reflected in three aspects:
The scope of knowledge involved is too wide, and each concept is relatively similar with low differentiation, such as distributed storage, distributed cache, RPC, microservices, etc., which often leads to confusion in learning and a feeling of fog and cloud.
Generally, small projects will not use these skills. The proportion of programmers who have access to distributed system development is small. Even if they know some distributed-related technical concepts, it is difficult to land them.
Compared with stand-alone systems, distributed systems have to consider complicated anomalies at every link. For example, network exceptions that do not exist in stand-alone systems are common in distributed systems, and any influential distributed framework will spend a lot of code to resolve these exceptions.
If you work for 2-3 years and want to further study in distributed architecture, the most important thing is to systematize knowledge.
In this share a Java programmer advanced systematic architecture knowledge learning mind map to share with everyone and at the end of the article there are free architecture interview topic materials and video materials to share!
Framework application and source code reading
Mybatis application and source code analysis
Spring source code analysis
SpringMVC
Micro service
Spring Cloud
Spring Boot
Docker
Dubbo application and source code analysis
Performance tuning
Internet engineering development tools
Maven
Git
Sonar
jenkins
Distributed High performance Architecture
Distributed Coordination Framework (Zookeeper)
RPC Service Framework (Dubbo)
Distributed Data Caching (Redis)
Distributed Data Storage (MYCAT)
Distributed Rabbitmq
The last
In view of the knowledge points mentioned above, I summarized the Internet company Java programmer interview questions and answers involved in the vast majority of the interview documents and architecture video materials to share with everyone free (including Dubbo, Redis, Netty, ZooKeeper, Spring Cloud, distributed, high concurrency and other architecture technology information), I hope to help you review before the interview and find a good job, but also to save the time we search for information on the Internet to learn, also hope that friends in need can find a good job in Jinsan Yinsi!
