Senior Java Engineer Job Responsibilities
Data source: mainstream recruitment websites, first-line company JD
Possess a solid Java foundation, proficient in multi-threaded programming, NIO models, and design patterns
Familiar with mainstream development frameworks such as Spring, and in-depth understanding of framework implementation principles and features
Familiar with MySQL database, with the ability of MySQL index optimization and query optimization
Familiar with common open source distributed middleware, caching, message queues, etc., and have relevant optimization experience
Practical experience related to the development and high availability of large-scale distributed systems, and the ability to design complex systems
Love technology, have almost strict requirements on code quality and development specifications, and be good at communication and teamwork.
As a Java engineer, are you facing such a growth dilemma?
1. Master the key technologies of JVM from 0, and understand the core knowledge;
2. Comprehensively understand the principles and characteristics of various GC algorithms, and gain insight into related principles;
3. Comprehensively learn common JVM analysis and tuning tools, and get started with 18 martial arts;
4. A comprehensive analysis of the JVM interview questions of major first-line manufacturers to help get your favorite offer.
Pain points in study and work
1. You have not learned about the systematic JVM, do not understand the principle, and cannot know what it is and why it is;
2. Unfamiliar with JVM tools and methods, do not know where to start, how to analyze and solve problems when encountering problems;
3. Lack of practice in the actual scene, forgetting the knowledge in the book every time you read it, the understanding is not deep, and it is impossible to understand it;
4. Nine out of ten times in the interview process, I encountered questions about JVM theory and analysis and tuning. It was difficult to satisfy the interviewer every time.
Core competencies mastered through learning
1. Consolidate the foundation: master the basic knowledge and common tools of JVM, understand the general principles, and know where to start to analyze the problem;
2. In-depth study: master the general principles of various GC algorithms, and know how to choose and use appropriate GC strategies according to actual needs;
3. Analyze problems: master the analysis skills of GC logs, threads, memory and other dimensions, and know the routines of troubleshooting and optimizing the system;
4. Accumulate experience: understand common analysis and tuning experience, be familiar with common interview questions and techniques, and thoroughly learn JVM knowledge.
details
1. Basic knowledge of JVM, Java bytecode technology, JVM class loader, JVM memory model, detailed explanation of JVM startup parameters;
2. JDK built-in command line tools, JDK built-in graphical interface tools, introduction to JDWP, JMX and related tools;
3. The basic principles and characteristics of common JVM GC algorithms (Parallel GC/CMS GC/G1 GC);
4. New generation GC algorithm (Java11 ZGC/Java12 Shenandoah) and Oracle GraalVM;
5. GC log interpretation and analysis, JVM thread stack and other data analysis, memory dump and memory analysis tools;
6. FastThread related tools and the use of several advanced tools when facing complex problems;
7. Common methods of JVM troubleshooting and analysis, best practice experience of performance tuning, etc.;
8. JVM-related common interview questions must be known and thoroughly analyzed.
Link: https://pan.baidu.com/s/1O8gMQOCvyKh7xxkOm4APkw
Extraction code: 8ie5
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