How to Become a Technical Expert: Common Misconceptions and Effective Practices

Regardless of whether you are a developer, tester, or operations engineer, many of us dream of becoming a technical "big shot" and believe that hard work alone will get us there.

In reality, the path is often blocked by misconceptions: relying on a senior expert for mentorship, thinking business code lacks technical depth, and assuming lack of time prevents learning.

Misconception 1: "Apprentice under a senior expert" – Senior engineers are busy and cannot provide one‑on‑one tutoring regularly; they are more effective when they give team‑wide training, and they become impatient with questions that can be answered via documentation or search.

Misconception 2: "Business code is not technically challenging" – While writing business logic is essential, it is only a stepping stone; advancing requires tackling more complex problems and broader system challenges.

Misconception 3: "No time to learn because of overtime" – Although overtime is common, learning can be integrated into work and fragmented time can be used for study and experimentation.

Correct Approach – Do More – Go beyond the tasks assigned by your manager: understand related features, read more code (even if you didn’t write it), and become the go‑to person for the whole system. This builds a holistic view that improves requirement analysis, problem resolution, and design quality.

Do Better – Identify inefficiencies or improvement opportunities in the system (e.g., duplicate code, performance bottlenecks, architecture refactoring) and propose concrete solutions. Repeatedly presenting viable ideas increases the chance of implementation and showcases expertise.

Do Exercise – Apply the three‑step cycle of Learning, Trying, and Teaching:

1. Learning : Systematically study fundamentals such as JVM internals, Java programming, networking, and HTTP, using books, videos, and blogs.

2. Trying : Build small experiments—e.g., a JVM memory‑allocation test, a Reactor‑pattern demo, a local MySQL instance, or a simple JDBC sharding prototype—to solidify knowledge.

3. Teaching : Explain concepts to others, write blog posts, or give internal talks; teaching forces you to organize knowledge and reveals gaps.

Even if you cannot directly work on low‑level components (e.g., Netty, MySQL), creating personal test projects or simulations prepares you for future opportunities.

Ultimately, becoming a technical leader requires continuous effort, curiosity, and passion. The methods above—doing more, doing better, and exercising your skills—help transform a routine job into a platform for growth.

Reference: Original article on jiangshu.com (Chinese).