8 Hard‑Won Lessons on Software Architecture Every Engineer Should Know

These reflections are not about specific technical implementations but about soft experiences and insights gained during architecture design and execution, aiming to spark thinking about architectural principles and practices.

1. Posing Questions Is Harder Than Solving Them

Engineers often focus on solving problems, yet actively raising questions from a user’s perspective is more challenging and crucial for effective communication with product managers and for driving innovative solutions.

2. Deciding What Not to Do Is Harder Than Deciding What to Do

Because of human greed, projects tend to accumulate features and non‑functional requirements; architects must be willing to say “no” and establish clear trade‑off principles early, such as prioritizing data consistency or early product releases.

3. Non‑Functional Requirements Drive Architecture

While functional requirements define what a system does, it is the non‑functional demands—performance, scalability, maintainability, team structure, release cadence—that truly determine the architectural style and choices.

4. Simplicity Is Not Easy

Keeping designs simple means achieving clarity and elegance, not merely ease of implementation; true simplicity often requires deep understanding and careful trade‑offs, as illustrated by the Bloom filter example.

5. Never Stop Coding

Architects must remain programmers; continuous coding keeps them grounded in practical realities and prevents detachment from the realities of implementation.

6. Prioritize Risk

Architecture aims to identify, transform, and mitigate risks early; focusing on non‑functional risk early can avoid costly rework and project failure.

7. Start From the Problem, Not the Technology

Choosing technology should be driven by the actual problem; otherwise, enthusiasm for new tools can lead to unnecessary complexity, as shown by a failed migration from MySQL to DynamoDB.

8. Over‑Busyness Makes You Fall Behind

Excessive workload prevents continuous learning, leading to skill stagnation and reduced competitiveness; maintaining a learning habit is essential for long‑term career growth.