Developers’ mistakes and tips to avoid them

7 Mistakes That A Developer Must Avoid

Frustrated Developer looking at his laptop

To err is human, but sometimes the smallest error can turn out to be the costliest ones. Similarly, in our development process, some mistakes can be catastrophic but these can be avoided with observations and some cool tricks. And as a wise man had said,

So, here we are going to talk about some of the mistakes a developer tends to do with the tips to avoid them.

Lack of Planning:

Naturally, you are eager to write codes and so some of you start writing it in your IDE/Editor without any plans. However, it is the wrong way of starting with code.

a female writing diagrams for her plan
a female writing diagrams for her plan

You need to think and plan how you are going to write the code before you start. Following a systematic approach as this would help:

  • Understand the problem statement
  • Find out all possible solutions and pick the best one
  • Identify the correct data-structure
  • Design the object model (LLD)
  • Pick or create a framework (code behaviours, directory structure etc.)

Then you can proceed with writing the code and modify it as required. Programming does not mean only writing lines of code, it’s a combination of step-by-step processes of different actions.

No Test Cases:

Even though you are confident about the code, proceeding without test cases is a recipe of disaster as it is prone to be error-laden.

If you test the code manually, there is nothing wrong with it. But, it is better if the manual test should be replicated as automated tests. Next time after adding new codes these test cases would run to check all the validations needed.

There is a huge possibility that you’ll forget to test the code with all the previously successful validation after each code change. Test cases can do that.

If possible it’s better to design your validation before writing code. Test-Driven Development (TDD) is a better way of how you think and design your feature.TDD is not for all projects, but if we can use it, it will be beneficial.

Code Quality:

Reliability , Efficiency , Readability , Portable , Robust, Maintainable code are keys of Quality Code.
Reliability , Efficiency , Readability , Portable , Robust, Maintainable code are keys of Quality Code.

The quality of the code is essential, and the readability is absolutely uncompromisable. Coding is a way to communicate the implementation. Here are a few mistakes to be taken care of:

  1. Using multiple lines in a method. You should always break methods into smaller ones.

A method should not have more than 10 lines.

  1. Using short, generic, or type-based variable names. Give your variables descriptive and non-ambiguous names.
  2. Using shortcuts, a workaround to avoid spending more time on some problem is not a good habit.
  3. Not sticking with indentation, capitalization must be avoided. Usage of Linting and formating tools can minimize a lot of issues.

The excessive use of conditional logic is not good. Find out the best simple alternatives approach.

Sensitive Data Leak:

Data is secured with a lock and chains

As a developer, it’s your responsibility to ensure there is no sensitive data shared during the development process.

There’s a known problem in server configuration and deploying when you have to store your private data such as database passwords, application secret-keys, environment configurations and so on inside the git repository. Even if this repository is private, it is a security risk to just publish them on the world wide web.

There are certain tools that can be used like git users can use git-secrets to prevent committing any sensitive information to a repository. Also, tools like repo-supervisor, truffleHog are very helpful in scanning the repositories to find out if there is sensitive information-pushed accidentally.

Unnecessary Comments:

Some of you used to add comments before obvious code blocks. We should avoid comments as much as possible with naming elements properly.

With better naming conventions on methods, variables, and other entities the written comments look unnecessary, don’t they? Though there are situations where only clarity can be provided by the comments but obvious comments to be avoided.


Attitude is a little thing that makes a big difference. Churchill Quotes

Different Emotional State of human attittude

As the quotes said, your attitude decides your skill, quality of work. This is a huge topic in itself, but let’s discuss some of them here.

  1. Not testing code after deployment: If the code is working fine in the local environment, it does not ensure that it will work the same way after code deployment. Some of you forget to test on deployment environments assuming it will work.

This habit can cause unwanted code breaks and must be avoided at any cost. In a development phase, these bugs can be found after a couple of days/weeks and will be a time-killer to fix them.

  • Not accepting the criticism: For a person open to constructive criticism, the sky’s the limit. And that’s exactly how a developer should be. It is the only way to achieve perfection in your work.

You are human and you are not perfect. Sometimes some of you take a comment from a code reviewer into your ego. Rather than criticising reviewer feedback, you should try to learn from his/her words to improve yourself.

Also, that does not mean you should blindly follow whatever is said. Communication is the key here. If you feel like something can work in another way you should pitch it and contribute as a team.

  • Not focusing on knowledge enhancement:

Anyone who stops learning is old, whether at twenty or eighty. Anyone who keeps learning stays young. Henry Ford

Learning is the key to success. It improves your knowledge and as a coder, you should implement the knowledge practically. You should develop the evergreen learning attitude within you. This is a special skill that will not only help in your professional career but also with personal growth.

  • Picking the First Solution: There are a couple of ways to solve a problem. The first solution might not be the best one. You should find out all possible ways to solve a problem and then analyze to pick the best suitable solution.

But if you are not able to think or approach differently on a problem statement, then the problem is not clear to you. Then you should ask more questions for clarity.

  • Emotional Attachment with Code: As a programmer, you used to attach with your code, you try to continue to improve it. It becomes a never-ending process. Nothing is perfect, not will be. There will be always a scope for improvement. You should limit the scope as per the requirement and move on to the next one.
  • Not Asking for Help: You sometimes think that you can fix an issue yourself and you are struggling with something. There is a way to handle this issue by using “30 mins Rule. So, next time you are stuck with a problem, you try yourself for 30 mins and after that seek help to fix it.
  • Not picking the right tool for the Job: For any feature development sometimes you use tools /libraries that are based on your personal preference rather than the solution required. Tools should be chosen as per the feature requirement basis.

Not taking breaks:

Taking breaks is a must for your programming schedule. If you work continuously without any break and think after finishing the work you’ll take rest then your energy will be drained. It is not healthy for you too. Also if you take a break of 5 mins in every 30–40 mins mind will be more balanced and the efficiency will also improve.

Some of the interesting blogs I found worth reading on this topic:


In this article, I shared some of the common mistakes developers make. With the right planning and correct attitude, mistakes can be minimized. Hope, the tips shared to ditch these mistakes will be worthwhile. Try to fail as early as possible to rectify quickly and get over it.

Fail early, Fail Often

Happy Coding :).

I am a technology enthusiast who loves to learn, explore life differently

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