20 Essential Lessons Every New Developer Must Know

Jonathan Danylko, a freelance web architect with over 20 years of experience across e‑commerce, biotech, real estate, healthcare, insurance and utilities, writes this guide especially for recent graduates and entry‑level programmers, though seasoned developers may also recognize themselves.

1. Estimate the time needed to solve problems

Set a realistic time limit (e.g., 1 hour, 30 minutes, or even 15 minutes). If you cannot solve the problem within that window, seek help or look for answers online instead of trying to become a "super coder".

2. A programming language is just a language

Once you understand the fundamentals of one language, you’ll see similarities among others. Choose a language that feels comfortable and lets you write effective, concise code, and let the language adapt to the project, not vice‑versa.

3. Don’t overemphasize design patterns

Sometimes a simple algorithm is easier than introducing a pattern. Code should be straightforward and understandable, even to a cleaner.

4. Frequently back up your code

Experiencing a hard‑drive failure that wipes out code is terrifying. Treat backups like a strict deadline; version‑control systems become indispensable.

5. Admit you are not the top programmer – know your limits

There will always be someone better; keep learning from them and strive to improve.

6. Keep learning

Continuously read books, magazines, or articles about computing to stay up‑to‑date and avoid falling behind.

7. Eternal change

Treat technology like a diversified stock portfolio. Don’t rely on a single language; learn two or three so you can pivot when one becomes obsolete.

8. Mentor newcomers

Help junior developers adopt good coding practices; you’ll also grow and gain confidence.

9. Simplify algorithms

After writing code, revisit it and optimize; small improvements make future maintenance easier.

10. Write documentation

Document APIs, classes, or simple functions. Even a brief comment adds clarity, especially for complex techniques.

11. Test, test, and test again

Adopt a black‑box testing mindset; thorough testing prevents bad reputation and catches errors early.

12. Celebrate every success

Recognize achievements with a handshake, high‑five, or a small celebration; it reinforces motivation.

13. Frequently review code

Both self‑review and peer review are constructive; they accelerate growth and improve code quality.

14. Review your own code

Reflect on past work to identify improvements; old code can be revived into better products.

15. Humor is indispensable

A sense of humor is essential in our field; it keeps the work environment healthy.

16. Beware of know‑it‑all, hoarding, and inexperienced programmers

Stay humble when encountering such colleagues; each attitude can hinder teamwork.

17. No project is ever simple

Even a small request can evolve into a larger system; proper planning prevents scope creep.

18. Never assume anything

Don’t assume a task is easy unless you have a proven component that’s already tested.

19. No software is ever truly finished

Software is only "temporarily complete"; continuous updates keep it relevant.

20. Patience is a virtue

Maintain patience with users and yourself; understanding problems from the computer’s perspective leads to better solutions.