Stop trying to be the best at one thing. Do skill-stacking and become a T-shaped developer instead

T-shaped development combines deep expertise in one area with broad knowledge across multiple domains, creating unique career leverage. In large tech companies, T-shaped engineers are more promotable due to their specialty credibility and ability to identify cross-team opportunities. This approach requires mastering a core domain first, then expanding knowledge in adjacent areas while applying both daily. The resulting balanced skill distribution enhances adaptability to industry changes and value in solving organizational bottlenecks.