How to Prepare for a Technical Interview: A Comprehensive Guide for Software Engineers

Hello, I’m Lao San. After a long pause I’m sharing an old, comprehensive article on how to prepare for a technical interview.

1. Understand Interview Focus

Before you start studying, identify the interview emphasis of the target company and position. Gather requirements from recruitment sites, official company career pages, and interview experience platforms.

Recruitment Websites : JD listings reveal required skills, experience, and personal qualities.

Official Company Sites : Direct postings from hiring teams give more precise expectations.

Interview Experience Sharing : Past candidates’ notes help you know typical questions and interview styles.

Examples of recruitment portals for major Chinese tech firms are provided in a table.

2. Review Technical Knowledge

The core of interview preparation is solid technical knowledge, especially for Java backend roles.

Technical Knowledge Topics

Java Language Features : core language, collections, exceptions, reflection, generics, inner classes.

Concurrency : thread pools, locks, synchronized, volatile, atomic classes.

JVM : memory areas, GC, class loading.

Frameworks : Spring (DI, AOP, MVC), MyBatis.

Computer Fundamentals : OS concepts, networking (TCP/IP, HTTP/HTTPS), data structures & algorithms.

Databases : MySQL (SQL optimization, indexes, transactions) and NoSQL (Redis).

Middleware : Kafka, RabbitMQ.

Distributed Micro‑services : service discovery (Eureka, Consul), load balancing (Nginx/Zuul), API gateway, config center (Spring Cloud Config).

Software Design : design patterns, system design (e‑commerce, flash‑sale).

Recommended books for each sub‑topic are listed (e.g., "Effective Java", "Deep Understanding of the JVM", "Spring in Action", "High‑Performance MySQL").

3. Prepare Coding Problems

Algorithmic coding questions are a staple of technical interviews. Follow a three‑stage approach:

Systematic Practice : Spend at least six months solving a wide range of problems (e.g., Programmer Carl tutorial).

High‑Frequency Problems : Focus the next three months on frequently asked questions from LeetCode and CodeTop.

Final Sprint : In the last month, practice company‑specific problems (e.g., ByteDance "rain water" problem, Meituan "剑指 Offer").

While algorithms may not be used daily at work, they provide a fair, quantifiable assessment in a competitive hiring environment.

4. Prepare Projects

Project experience showcases practical problem‑solving ability. Choose 1‑2 projects that align with the target role, describe background, your role, tech stack, challenges, solutions, and outcomes using the STAR method.

Example: an e‑commerce payment system built with Spring Boot, MySQL, Redis, and RocketMQ, achieving a 20% increase in payment success rate.

5. Improve Soft Skills

Soft skills such as communication, teamwork, and a collaborative mindset (“interview affinity”) are crucial.

Co‑win Attitude : Treat the interview as a two‑way selection.

Self‑Introduction : Prepare a 3‑5 minute concise pitch.

Friendly Attitude : Maintain a slightly more positive demeanor than the interviewer.

Answer Framework : Use the 5W1H (Who, What, When, Where, Why, How) or McKinsey’s MECE approach.

Active Listening : Show you understand the interviewer’s questions and provide feedback.

Continuous Improvement : Record mock interviews, review, and iterate.

6. Prepare Resume

The resume is your first impression. Keep it concise (2‑3 pages), well‑structured, and tailored to the JD.

Personal Information : Name, contact, email, optional GitHub/Blog.

Job Intent : Desired position and location.

Education : School, degree, major, dates.

Professional Skills : List Java, Spring, MySQL, Redis, messaging, system design, etc., with proficiency levels.

Work Experience : Use STAR to describe responsibilities and impact.

Project Experience : Highlight relevance, tech stack, and results.

Self‑Evaluation : Briefly mention responsibility, learning ability, and technical passion.

Templates from GitHub (e.g., billryan/resume) and online tools are suggested.

7. Resume Submission

Choose appropriate channels (recruitment sites, company career pages, internal referrals) and adopt a “wide net + focused follow‑up” strategy.

Wide Net : Submit broadly to increase interview chances.

Focused Follow‑up : Prioritize high‑interest companies, customize resumes, seek referrals.

Maintain proactive follow‑up (e.g., a “3‑5 day” rule) via email or messaging.

8. Mock Interviews

Practice with peers, mentors, or online platforms; record yourself; refine answers based on feedback.

9. Formal Interview

Typical large‑tech interview flow: three technical rounds (expert, supervisor, senior leader) plus an HR round.

Energy Management : Ensure adequate rest between rounds.

Time Management : Avoid conflicts with current job.

Company Research : Demonstrate knowledge of products and culture.

Mental Adjustment : Stay calm and treat the interview as a two‑way conversation.

10. Keep a Positive Mindset

Interview outcomes are not destiny; stay resilient, learn from each attempt, and keep a balanced perspective.

References: "Soft Skills: The Software Developer’s Life Manual", "Soft Skills: A Software Developer’s Career Guide", and a Juejin article.