The job-hopping boom of gold, silver and silver is about to pass. In the peak season of job-hopping in the past two months, as the three giants in the Internet industry, Baidu, Alibaba and Tencent are very attractive to Internet talents, and their employees are also numerous The senior engineer and manager candidate coveted by Internet peers.

Here's a summary of the skills you'll need to get into these three companies:

Alibaba articles

Solid computer professional foundation, including algorithms and data structures, operating systems, computer networks, computer architecture, databases, etc.
Have a solid Java programming foundation , understand basic frameworks such as IO and multithreading
Familiar with common commands and shells of Linux system
Proficient in multi-threaded programming, familiar with distributed, cache, message queue and other mechanisms; familiar with JVM, including memory model, class loading mechanism and performance optimization
Proficient in spring mvc, orm framework (ibatis or hibernate), template engine (velocity), relational database design and SQL
Good experience in object-oriented programming, in-depth understanding of OO and AOP ideas, strong analysis and design capabilities, and familiarity with common design patterns
Experience in large-scale distributed, high-concurrency, high-load, high-availability system design and stability
Familiar with object -oriented design and development , familiar with various common design patterns , and have experience in specific application scenarios
Familiar with Spring, iBatis, and other open source frameworks and common middleware such as messaging and storage. Have read through the source code of the open source framework
Familiar with Oracle or Mysql-based design and development, Linux operating system
Familiar with SOA, have experience in platform implementation, and have experience in building large data volumes, high concurrency systems and large websites
Distributed system application architecture design and R&D experience, proficient in Java EE, SOA, OSGI and other related technologies
Have in-depth understanding of various open source frameworks such as Spring, Hibernate, etc., those who have developed or refactored the framework itself can be preferred
Experience in system architecture design of large-scale e-commerce websites, O2O industry, and C-side products

Baidu articles

Familiar with common design patterns, master Java's popular open source framework SpringMVC/Spring Boot/Spring Cloud, and be proficient in using at least one ORM framework
Proficient in basic data structures and algorithms, with practical experience in system analysis and design
Familiar with Rest, HTTP, Socket, webservice, HTTP protocols, with concurrent and multi-threaded programming experience
Have research or project experience in databases such as Mysql, Redis, MongoDB, etc.
Experience in large-scale Internet service design and development
Familiar with JVM, have a certain understanding of JVM, and can use related tools to perform JVM performance tuning
Familiar with common open source distributed middleware, cache, message queue, etc., familiar with common open source software such as nginx, MySQL, Redis, mongodb, etc.
Familiar with MySQL database design and optimization, and experience with NoSQL databases
Experience in big data storage or high-performance computing platform architecture, design and development
Experience in large-scale Internet service design and development

Tencent articles

Proficient in at least one web background development language (PHP, Java, .Net, C++), with certain architectural capabilities and good code specifications
Familiar with linux/unix system and development environment
Familiar with TCP/IP protocol, socket programming
Familiar with mysql and SQL language
Experience in the design and development of high-performance and large-capacity service systems
Proficient in object-oriented design, proficient in J2EE development, java web development
Comprehensive and solid software knowledge structure (operating systems, software engineering, design patterns, data structures, database systems, network security);
Have good analytical and problem-solving skills, be able to independently undertake tasks and have the ability to systematically control the progress
Proficient in MySQL or Mongo DB, familiar with caching technologies memcached, redis
Experience in designing, developing and tuning large - scale distributed, high-concurrency, high-load, and high-availability systems
B/S structural system analysis and design experience, experience in building scalable, extensible, high-availability systems
Have good development habits, familiar with Maven, Jenkins, JUnit and other tools
Proficient in the principles and applications of MVC/REST architecture, template engine, and middleware
Familiar with MySQL database, understand MySQL index optimization, query optimization and storage optimization

The above are the skills points I summarized after I went to these three companies for interviews. If you are interested, you can continue to watch the learning route I provided, which can help you enter these three companies smoothly: I have recorded a lot of videos on the following technologies Post it in my group: 725633148, for everyone to learn for free, I hope it can help everyone to be a satisfied company no matter whether they can enter the BAT company or not.

Source code analysis: