Vlad Mihalcea @vlad_mihalcea Twitter profile

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Vlad Mihalcea

9 days

I'm going to run a High-Performance Java Persistence training at the end of May. If you want to learn how to get the best out of Spring, JPA, and Hibernate, then you are going to love this training.

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Vlad Mihalcea

@vlad_mihalcea

3 years

Software developers are students for life.

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Vlad Mihalcea

@vlad_mihalcea

2 years

Code review in a nutshell

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Vlad Mihalcea

@vlad_mihalcea

5 months

Applying the high scalability tips from Google and Netflix software architectures to your trivial project.

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Vlad Mihalcea

@vlad_mihalcea

9 months

Just because you are a back-end developer, it doesn't mean you cannot come up with a beautiful UI design.

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Vlad Mihalcea

@vlad_mihalcea

3 years

Software developer choosing a good name for a new method or variable.

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Vlad Mihalcea

@vlad_mihalcea

4 months

How code review is done

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Vlad Mihalcea

@vlad_mihalcea

6 months

Software developer reading programming books

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Vlad Mihalcea

@vlad_mihalcea

4 years

You can write a software book and make over 100k $ Here's what worked for me: 1. I started a blog first. This allows you to practice your writing and build an audience.

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Vlad Mihalcea

@vlad_mihalcea

4 years

Another day has passed without having to invert a binary tree or implement a sorting algorithm.

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Vlad Mihalcea

@vlad_mihalcea

2 months

Applying the StackOverflow solution to your project

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Vlad Mihalcea

@vlad_mihalcea

3 years

A senior software developer is a developer who likes writing boring code with boring technologies

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Vlad Mihalcea

@vlad_mihalcea

2 years

Adding Javadoc comments to getter and setters

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Vlad Mihalcea

@vlad_mihalcea

3 years

The struggle is real 😀

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Vlad Mihalcea

@vlad_mihalcea

4 years

Hours of debugging can save minutes of reading the documentation.

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Vlad Mihalcea

@vlad_mihalcea

3 years

Firefox on Windows

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Vlad Mihalcea

@vlad_mihalcea

3 years

Preparing your trivial project for Big Data because Google and Netflix also had this problem.

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Vlad Mihalcea

@vlad_mihalcea

2 years

17 years of software development taught me three very important lessons; 1️⃣ Unit and integration tests are the best way to prevent bugs. 2️⃣ Keep it simple! Remove anything that's not strictly required. 3️⃣ Question everything! From requirements to cargo cult tech trends.

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Vlad Mihalcea

@vlad_mihalcea

4 years

Some companies have tech interviews that validate whether you can send a rocket to the moon, when, in fact, their day-to-day applications just fetch data from a database and display it on the UI.

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Vlad Mihalcea

@vlad_mihalcea

3 years

Software developer choosing a good name for a new side project.

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Vlad Mihalcea

@vlad_mihalcea

3 years

Software developers are forever students

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Vlad Mihalcea

@vlad_mihalcea

3 years

Planning software projects

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Vlad Mihalcea

@vlad_mihalcea

3 years

Getter and setter Javadoc comments

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Vlad Mihalcea

@vlad_mihalcea

4 years

Donald Knuth's "premature optimization is the root of all evil" is about micro-optimizations. You still need to design your application so that it reads and writes data efficiently. That's not premature optimization. That's software engineering.

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Vlad Mihalcea

@vlad_mihalcea

2 years

Very useful 😀

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Vlad Mihalcea

@vlad_mihalcea

3 years

Following programming tutorials

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Vlad Mihalcea

@vlad_mihalcea

2 years

Shopify uses a monolith architecture built with Ruby on Rails and MySQL. And, it scales to traffic volumes that most of the projects we are usually building will never even dream of getting 5% of that load.

Shopify Engineering

@ShopifyEng

2 years

2021 was our biggest Black Friday Cyber Monday ever! Together with our friends at @GoogleCloud we achieved near-perfect uptime while averaging ~30TB/min of egress traffic across our infrastructure. That’s a massive ~43PB/day! Here are some of the most interesting stats 🧵👇

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Vlad Mihalcea

@vlad_mihalcea

8 months

Another day has passed without having to invert a binary tree or implement a sorting algorithm.

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Vlad Mihalcea

@vlad_mihalcea

4 years

I didn't study Computer Science. I graduated Electronics and Telecommunications. Everything I know about programming is because some awesome developers wrote articles and books that helped me learn software development. You don't have to work in a school to be a teacher.

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Vlad Mihalcea

@vlad_mihalcea

2 years

Devs who say Java is verbose have probably never built a Spring Boot application. Spring Boot is one of the least verbose ways to build a fully-functional web app or service.

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Vlad Mihalcea

@vlad_mihalcea

2 years

In software, legacy means it runs in production.

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Vlad Mihalcea

@vlad_mihalcea

4 years

If I hadn't failed a job interview at Amazon in 2015, I wouldn't have started my own business, focused on helping others get the most out of their DBs. Failing an interview is harsh, but it's not an end of the world. It can also be a turning point in your career.

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Vlad Mihalcea

@vlad_mihalcea

3 years

Today, @Hibernate turns 20! Happy birthday to one of the most successful @Java data access frameworks and to @1ovthafew for creating it!

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Vlad Mihalcea

@vlad_mihalcea

2 years

Software development is the art of replicating the non-standard architecture choices made by Google, Facebook, or Netflix into trivial projects with modest requirements.

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Vlad Mihalcea

@vlad_mihalcea

3 years

Frameworks come and go. Relational databases stay.

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Vlad Mihalcea

@vlad_mihalcea

4 years

As a senior developer, you should treat junior developers as you had wanted to be treated when you first started your career.

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Vlad Mihalcea

@vlad_mihalcea

3 years

Fixing a bug in a microservice architecture

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Vlad Mihalcea

@vlad_mihalcea

7 months

Software developer thinking of a good name for a variable.

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Vlad Mihalcea

@vlad_mihalcea

4 years

The Java ecosystem loves abstractions. 1. JDBC abstracts the RDBMS Driver API. 2. Hibernate abstracts how Objects are read or written using JDBC. 3. JPA abstracts Hibernate. 4. Spring Data JPA abstracts JPA. 5. Spring Boot abstracts Spring Data JPA.

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Vlad Mihalcea

@vlad_mihalcea

3 years

Developer being asked for an estimate

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Vlad Mihalcea

@vlad_mihalcea

2 years

When I started learning Java in 2002, many people were saying that Java is slow and can never compete with C or C++. 20 years later, all High-Frequency Trading companies I know use Java instead of C/C++.

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Vlad Mihalcea

@vlad_mihalcea

3 years

The 8-hour sleep the best debugger.

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Vlad Mihalcea

@vlad_mihalcea

4 years

I use Tab-Driven Development. The more difficult the task, the more browser tabs I open.

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Vlad Mihalcea

@vlad_mihalcea

4 years

Just because you are a back-end developer, it doesn't mean you cannot come up with a beautiful UI design.

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Vlad Mihalcea

@vlad_mihalcea

3 years

The mathematics of progress. If you improve a skill by 1% each day, after one year you are 37 times better at it.

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Vlad Mihalcea

@vlad_mihalcea

3 months

Software development is the art of replicating the atypical architecture choices made by Google, Facebook, or Netflix into trivial projects with modest requirements.

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Vlad Mihalcea

@vlad_mihalcea

4 years

The best teams I've ever worked on were not made of 10x developers who knew everything, but of developers that were kind, funny, humble and professional.

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Vlad Mihalcea

@vlad_mihalcea

8 months

Software development is the only industry where a person can become a senior before turning 30 years old.

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Vlad Mihalcea

@vlad_mihalcea

4 years

Why write an SQL query when you can fetch the entire database table with a findAll method call and process the result with the Java Stream API in order to find the single record you are interested in?

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Vlad Mihalcea

@vlad_mihalcea

2 years

I plan to write an article about the maximum number of connections you can use on various database systems (e.g., Oracle, SQL Server, PostgreSQL, MySQL), and, even if there's a hard limit, what actually limits your maximum connection count in the end. Are you interested in this?

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Vlad Mihalcea

@vlad_mihalcea

4 months

20 years of software development taught me three very important lessons; 1️⃣ Unit and integration tests are the best way to prevent bugs. 2️⃣ Keep it simple! Remove anything that's not strictly required. 3️⃣ Question everything! From requirements to cargo cult tech trends.

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Vlad Mihalcea

@vlad_mihalcea

3 years

You don't need 10x developers to build a great team. You need professionals who are kind and help each other. That's how you build a great team.

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Vlad Mihalcea

@vlad_mihalcea

3 years

Software developers never stop learning

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Vlad Mihalcea

@vlad_mihalcea

2 years

How to become a 10x developer: 1. Be kind 2. Take care of yourself 3. Strive for work-life balance 4. Read the docs 5. Write the docs 6. Write integration tests 7. Share knowledge 8. Answer StackOverflow questions 9. Study the OSS code you're relying on 10. Be kind

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Vlad Mihalcea

@vlad_mihalcea

3 years

Code reusability is what you get when you use a framework. Overengineering is what get when you spend time and resources building an in-house framework no one wanted or needed.

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Vlad Mihalcea

@vlad_mihalcea

1 year

Applying the StackOverflow solution to your project

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Vlad Mihalcea

@vlad_mihalcea

1 year

IT Support

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Vlad Mihalcea

@vlad_mihalcea

2 years

SQL brings a lot to the table.

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Vlad Mihalcea

@vlad_mihalcea

3 years

Not using database-specific features in the name of portability is a very common mistake. Database portability makes sense for frameworks or template products. End products rarely switch DBs. I only had to do that twice in 17 years.

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Vlad Mihalcea

@vlad_mihalcea

3 years

Protip: If you want to become a better software developer, you should study the source code of the frameworks you are using. Not only you'll get a better understanding of how they work, but you're going to learn how design patterns are applied in practice.

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Vlad Mihalcea

@vlad_mihalcea

4 months

True that

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Vlad Mihalcea

@vlad_mihalcea

3 years

Software developer fixing a YAML file

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Vlad Mihalcea

@vlad_mihalcea

3 years

In software development, Simple is better than Smart.

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Vlad Mihalcea

@vlad_mihalcea

3 years

You know you're a software developer when you spend 4 hours automating a 30-second typing task.

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Vlad Mihalcea

@vlad_mihalcea

3 years

The struggle is real

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Vlad Mihalcea

@vlad_mihalcea

4 years

You don't need a large team to build an awesome software product. A small team of motivated developers can do wonders.

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Vlad Mihalcea

@vlad_mihalcea

4 years

The most useful technical skill I learned as a developer does not involve new programming languages, clever algorithms or fancy data structures. It was to write effective unit and integration tests.

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Vlad Mihalcea

@vlad_mihalcea

9 months

Don't avoid framework or database-specific features in the name of portability. For instance, how many times did you have to switch the JPA provider? Or, how many times did you have to switch database systems in an enterprise project? Instead of preparing for a future that

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Vlad Mihalcea

@vlad_mihalcea

1 year

Finally!

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Vlad Mihalcea

@vlad_mihalcea

3 years

The end of programming as we know it 😀

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Vlad Mihalcea

@vlad_mihalcea

2 years

✅ You’re solely responsible for your career journey. ❌ Not the company you're working for. ❌ Not your manager you're reporting to. ❌ Not the team you’re working with. The sooner you realize this, the better.

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Vlad Mihalcea

@vlad_mihalcea

5 months

In software, legacy means it runs in production.

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Vlad Mihalcea

@vlad_mihalcea

7 months

Senior developers don't mind writing boring code with boring technologies

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Vlad Mihalcea

@vlad_mihalcea

3 years

If you want to become a better software developer: ✅ Read everyday. ✅ Never stop learning. ✅ Teach others what you know. ✅ Build stuff because execution beats knowledge.

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Vlad Mihalcea

@vlad_mihalcea

8 months

Protip: If you want to become a better software developer, you should study the source code of the frameworks you are using. Not only do you get a better understanding of how they work, but you're going to learn how various design patterns are applied in practice.

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Vlad Mihalcea

@vlad_mihalcea

1 year

The best UUID type for a database Primary Key

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Vlad Mihalcea

@vlad_mihalcea

4 years

You don't need a Computer Science degree to write software that's used by millions of developers.

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Vlad Mihalcea

@vlad_mihalcea

3 years

Another day has passed without having to invert a binary tree

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Vlad Mihalcea

@vlad_mihalcea

4 years

If a software project succeeds, it's because the project manager has done a great job. If a software project fails, it's because the development team hasn't done a great job. Sounds familiar? 😀

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Vlad Mihalcea

@vlad_mihalcea

3 years

The maximum number of nested for loops is 18 because that's the number of letters between i and z.

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Vlad Mihalcea

@vlad_mihalcea

4 years

Software development is the only industry where a person can become a senior before turning 30 years old.

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Vlad Mihalcea

@vlad_mihalcea

4 years

That day will never come: - One day, I'll add some unit tests for this. - I'll write the documentation later when I have some time. - I'll start blogging or write a book after I finish this sprint or release. Unless you start doing it now, you'll keep on lying to yourself.

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Vlad Mihalcea

@vlad_mihalcea

3 years

In software, Simple is better than Smart.

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Vlad Mihalcea

@vlad_mihalcea

6 months

Frameworks come and go. Relational databases stay.

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Vlad Mihalcea

@vlad_mihalcea

4 years

If you want to become an expert in a given technology, you have to start writing about it. You'll learn way more than just reading documentation.

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Vlad Mihalcea

@vlad_mihalcea

7 months

I started learning Java in 2003, and after 20 years, I still enjoy building projects with it. Learning Java has been one of the best career moves I've ever made.

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Vlad Mihalcea

@vlad_mihalcea

2 years

Debugging in production

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Vlad Mihalcea

@vlad_mihalcea

2 years

Modern software architectures

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Vlad Mihalcea

@vlad_mihalcea

5 months

The maximum number of nested for loops is 18 because that's the number of letters between i and z.

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Vlad Mihalcea

@vlad_mihalcea

3 years

As software developers, we are very fortunate to be able to earn good money doing what we really enjoy.

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Vlad Mihalcea

@vlad_mihalcea

3 years

After 17 years, I still love programming in @Java . It's definitely not the easiest language to learn, but learning Java has been one of the best career move I've ever made.

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Vlad Mihalcea

@vlad_mihalcea

2 years

War is a place where the young kill one another without knowing or hating each other, because of the decision of old people who know and hate each other, without killing each other. -- Erich Hartmann

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Vlad Mihalcea

@vlad_mihalcea

3 years

Frontend developer ✅ Backend developer ✅ Weekend developer ❌

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Vlad Mihalcea

@vlad_mihalcea

3 years

Pro tip: As an experienced software developer, investing time in learning about business, management, marketing and sales can be way more profitable than keeping up with all the hype in programming languages or frameworks.

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Vlad Mihalcea

@vlad_mihalcea

3 years

Whenever someone in the team said it was going to be an easy fix.

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Vlad Mihalcea

@vlad_mihalcea

3 years

Software development is a learning job.

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Vlad Mihalcea

@vlad_mihalcea

2 years

The best way to log SQL statements with Spring Boot

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Vlad Mihalcea

@vlad_mihalcea

1 year

A beginner’s guide to database multitenancy

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Vlad Mihalcea

@vlad_mihalcea

4 years

Some Java developers like to solve all of their problems using Java. Even if some problems are better solved using HTML, CSS, JavaScript or SQL. Use the right tool for the job!

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Vlad Mihalcea

@vlad_mihalcea

3 years

As software developers, we are very fortunate to be able to earn good money while doing what we really enjoy.

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Vlad Mihalcea

@vlad_mihalcea

2 years

It's just artificial intelligence

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