Essential Backend Skills to Land a Job at Baidu, Alibaba, or Tencent

After the peak hiring season of September and October, Baidu, Alibaba, and Tencent remain the most attractive employers for senior engineers and managers in the internet industry.

Alibaba

Solid computer science fundamentals: algorithms, data structures, operating systems, networking, computer architecture, and databases.

Strong Java programming foundation, including I/O and multithreading.

Proficiency with Linux commands and basic shell scripting.

Expertise in multithreaded programming, distributed systems, caching, message queues, and JVM performance tuning.

Deep knowledge of Spring MVC, ORM frameworks (iBatis or Hibernate), template engines (Velocity), relational database design, and SQL.

Extensive object‑oriented design experience, understanding of OO/AOP concepts, and familiarity with common design patterns.

Experience designing large‑scale, high‑concurrency, high‑availability systems.

Hands‑on experience with open‑source frameworks (Spring, iBatis) and middleware.

Experience with Oracle or MySQL development and Linux environments.

SOA experience, platform implementation, and large‑scale, high‑traffic website architecture.

Design and development experience for large e‑commerce or O2O platforms.

Ba​idu

Familiarity with common design patterns and popular Java frameworks such as Spring MVC, Spring Boot, and Spring Cloud; proficiency with at least one ORM.

Strong grasp of data structures, algorithms, and system analysis/design practice.

Understanding of REST, HTTP, sockets, web services, and concurrent/multithreaded programming.

Project experience with MySQL, Redis, MongoDB, and other databases.

Experience designing and developing large‑scale internet services.

Knowledge of JVM internals and ability to perform performance tuning.

Experience with distributed middleware, caching, message queues, Nginx, and common open‑source software.

MySQL design, optimization, and NoSQL usage.

Background in big‑data storage or high‑performance computing platforms.

Tencent

Proficiency in at least one backend language (PHP, Java, .NET, C++) with solid architectural skills and coding standards.

Familiarity with Linux/Unix development environments.

Understanding of TCP/IP and socket programming.

Strong MySQL and SQL skills.

Experience designing high‑performance, high‑capacity services.

Expertise in object‑oriented design, J2EE, and Java web development.

Comprehensive software knowledge: OS, software engineering, design patterns, data structures, databases, and network security.

Strong problem‑solving, independent task ownership, and project progress management.

Proficiency with MySQL or MongoDB and caching technologies like Memcached and Redis.

Experience with large‑scale, high‑concurrency, high‑availability system design, development, and optimization.

Experience in B/S architecture analysis and design for scalable, extensible systems.

Familiarity with Maven, Jenkins, JUnit, and related tools.

Expertise in MVC/REST architecture, template engines, and middleware principles.

Knowledge of MySQL indexing, query, and storage optimization.