Which principles that all software developers should know

1. Write Code for Humans First, Machines Second

Prioritize readability and clarity over cleverness.
Use meaningful variable names, consistent formatting, and comments where necessary.
Think of your future self (or teammate) trying to debug at 2 AM.

2. DRY: Don’t Repeat Yourself

Avoid duplication by abstracting reusable logic into functions, classes, or modules.
Reduces bugs and makes updates easier.

3. KISS: Keep It Simple, Stupid

Simplicity leads to maintainability.
Don’t over-engineer—solve the problem at hand with the least complexity.

4. YAGNI: You Aren’t Gonna Need It

Resist the urge to build features “just in case.”
Focus on current requirements; premature optimization is a trap.

5. Fail Fast, Fail Loud

Catch errors early and surface them clearly.
Use assertions, logging, and exceptions to make failures informative.

Design & Architecture Principles

6. SOLID Principles

These five principles help create scalable, maintainable object-oriented systems:

S ingle Responsibility: Each class should do one thing.
O pen/Closed: Open for extension, closed for modification.
L iskov Substitution: Subtypes must be substitutable for their base types.
I nterface Segregation: Prefer many small interfaces over one large one.
D ependency Inversion: Depend on abstractions, not concrete implementations.

7. Separation of Concerns

Divide responsibilities across layers (UI, business logic, data access).
Keeps code modular and testable.

8. Encapsulation

Hide internal details and expose only what’s necessary.
Promotes robustness and reduces unintended side effects.

Practical Development Habits

9. Version Control Mastery

Use Git effectively: branching, merging, rebasing, and writing good commit messages.
It’s your safety net and collaboration tool.

10. Test-Driven Development (TDD)

Write tests before code to clarify requirements and catch regressions.
Even if not strict TDD, unit tests and integration tests are essential.

11. Continuous Learning

Stay curious: explore new languages, frameworks, and paradigms.
Read code, write code, and reflect on what works and what doesn’t.

Broader Mindset Principles

12. Accessibility & Inclusivity

Build with diverse users in mind: semantic HTML, ARIA roles, keyboard navigation.
It’s not just ethical—it’s strategic.

13. Performance Awareness

Understand time and space complexity.
Profile and optimize only when needed, but know where bottlenecks hide.

14. Security by Design

Validate inputs, sanitize outputs, and follow least privilege principles.
Security isn’t a feature—it’s a mindset.

Communication & Collaboration

Write clear documentation and commit messages.
Ask questions, give feedback, and mentor others.
Code is a team sport—even when you’re solo.

2 Replies

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Sam Hobbs1y ago
One important principle is to never try to make other programmers behave the way you think they should. A company or other organization can define standards that their employees must follow but other than that, we cannot force other programmers to comply with our principles.

I think that importance is highly subjective. Someone might think something is important, another person might think it is foolish.
0
Deepika Sawant1y ago
1. Write Code for Humans First, Machines Second
- Prioritize readability and clarity over cleverness.
- Use meaningful variable names, consistent formatting, and comments where necessary.
- Think of your future self (or teammate) trying to debug at 2 AM.
2. DRY: Don’t Repeat Yourself
- Avoid duplication by abstracting reusable logic into functions, classes, or modules.
- Reduces bugs and makes updates easier.
3. KISS: Keep It Simple, Stupid
- Simplicity leads to maintainability.
- Don’t over-engineer—solve the problem at hand with the least complexity.
4. YAGNI: You Aren’t Gonna Need It
- Resist the urge to build features “just in case.”
- Focus on current requirements; premature optimization is a trap.
5. Fail Fast, Fail Loud
- Catch errors early and surface them clearly.
- Use assertions, logging, and exceptions to make failures informative.
Design & Architecture Principles
6. SOLID Principles
These five principles help create scalable, maintainable object-oriented systems:
- S ingle Responsibility: Each class should do one thing.
- O pen/Closed: Open for extension, closed for modification.
- L iskov Substitution: Subtypes must be substitutable for their base types.
- I nterface Segregation: Prefer many small interfaces over one large one.
- D ependency Inversion: Depend on abstractions, not concrete implementations.
7. Separation of Concerns
- Divide responsibilities across layers (UI, business logic, data access).
- Keeps code modular and testable.
8. Encapsulation
- Hide internal details and expose only what’s necessary.
- Promotes robustness and reduces unintended side effects.
Practical Development Habits
9. Version Control Mastery
- Use Git effectively: branching, merging, rebasing, and writing good commit messages.
- It’s your safety net and collaboration tool.
10. Test-Driven Development (TDD)
- Write tests before code to clarify requirements and catch regressions.
- Even if not strict TDD, unit tests and integration tests are essential.
11. Continuous Learning
- Stay curious: explore new languages, frameworks, and paradigms.
- Read code, write code, and reflect on what works and what doesn’t.
Broader Mindset Principles
12. Accessibility & Inclusivity
- Build with diverse users in mind: semantic HTML, ARIA roles, keyboard navigation.
- It’s not just ethical—it’s strategic.
13. Performance Awareness
- Understand time and space complexity.
- Profile and optimize only when needed, but know where bottlenecks hide.
14. Security by Design
- Validate inputs, sanitize outputs, and follow least privilege principles.
- Security isn’t a feature—it’s a mindset.
Communication & Collaboration
- Write clear documentation and commit messages.
- Ask questions, give feedback, and mentor others.
- Code is a team sport—even when you’re solo.
+1