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Rasther00's avatar

What should a Backend Developer really focus on?

I'm currently an entry-level developer with a couple of years of experience, and I've found myself gravitating toward backend development. As part of my learning journey, I’ve been working with Laravel and following resources like Laracasts.

Over time, I've come to believe that what truly matters in backend development is not the specific language or framework, but mastering the fundamental principles — things like system design, architecture, and backend operations.

Some of the core areas I've been focusing on include:

  • Business logic design
  • Data modeling and database optimization
  • Security best practices
  • API design and integration
  • Testing and debugging
  • Performance and scalability
  • Basic DevOps knowledge

I'd appreciate hearing your thoughts or advice based on your professional experience.

Thanks in advance!

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8 replies
LaryAI's avatar
Level 58

You're absolutely on the right track! As a backend developer, focusing on the fundamentals is far more valuable in the long run than becoming overly attached to a specific framework or language. Here’s a breakdown of what you’ve listed, along with some additional advice and resources:

1. Business Logic Design

  • Learn how to translate real-world requirements into clean, maintainable code.
  • Study design patterns (e.g., Repository, Service, Strategy) and principles like SOLID.
  • Practice Domain-Driven Design (DDD) for complex business domains.

2. Data Modeling and Database Optimization

  • Understand normalization, indexing, and query optimization.
  • Get comfortable with both SQL (MySQL, PostgreSQL) and NoSQL (MongoDB, Redis) databases.
  • Learn about transactions, ACID properties, and data migrations.

3. Security Best Practices

  • Study authentication (OAuth, JWT, sessions) and authorization.
  • Prevent common vulnerabilities: SQL injection, XSS, CSRF, etc.
  • Regularly review the OWASP Top 10.

4. API Design and Integration

  • Learn RESTful API principles and when to use alternatives like GraphQL.
  • Focus on versioning, documentation (Swagger/OpenAPI), and error handling.
  • Practice integrating with third-party APIs and building your own.

5. Testing and Debugging

  • Write unit, integration, and end-to-end tests.
  • Use tools like PHPUnit (for Laravel), Xdebug, and logging frameworks.
  • Embrace Test-Driven Development (TDD) when possible.

6. Performance and Scalability

  • Profile and optimize slow queries and code bottlenecks.
  • Learn about caching strategies (Redis, Memcached).
  • Understand horizontal vs. vertical scaling, load balancing, and message queues.

7. Basic DevOps Knowledge

  • Get familiar with CI/CD pipelines (GitHub Actions, GitLab CI, etc.).
  • Learn containerization (Docker) and basics of cloud platforms (AWS, DigitalOcean).
  • Understand server monitoring and logging.

Additional Tips

  • Communication: Backend developers often need to explain technical concepts to non-technical stakeholders. Practice clear communication.
  • Documentation: Always document your code and APIs.
  • Continuous Learning: Tech evolves quickly; keep up with new tools and best practices.

Example: Structuring a Laravel Service Layer

Here’s a simple example of separating business logic into a service class in Laravel:

namespace App\Services;

use App\Models\Order;

class OrderService
{
    public function createOrder(array $data)
    {
        // Business logic for creating an order
        // e.g., checking inventory, applying discounts, etc.
        return Order::create($data);
    }
}

Then, in your controller:

use App\Services\OrderService;

class OrderController extends Controller
{
    protected $orderService;

    public function __construct(OrderService $orderService)
    {
        $this->orderService = $orderService;
    }

    public function store(Request $request)
    {
        $order = $this->orderService->createOrder($request->all());
        return response()->json($order, 201);
    }
}

Final Thoughts

Keep focusing on the fundamentals you listed. Frameworks and languages will come and go, but strong core skills will always be in demand. Keep building, keep learning, and don’t hesitate to dive deeper into any of these areas as your career progresses!

If you want specific resources or have questions about any of these topics, feel free to ask!

vincent15000's avatar

When you develop a web application (or basically an application), you have 2 main parts :

  • a CRUD one

  • a business one

The CRUD part is generally not difficult.

But you have to pay attention to the business logic and structure your code accordingly. In many situations, think it easy is sufficient ; for other situations, I recommend you to learn some design patterns.

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jlrdw's avatar

And if you don't understand something, research it. Like one user was unsure how to store an invoice or receipt correctly.

A "pretty app" doesn't mean a good app.

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JussiMannisto's avatar

@jlrdw A pretty app doesn't mean a good app, but an ugly app is a good indicator of incompetence, inexperience, laziness, or all of the above. Making an app look presentable isn't hard.

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jlrdw's avatar

@vincent15000 One with modern design, like the laracast.com layout.

But just because it looks good doesn't mean the programming (business logic) is correct.

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jlrdw's avatar

@JussiMannisto Not true. I have seen many older apps that did not look "pretty" but all programmed correctly.

But I have been at this since 1989 time frame when I used dbase 3.

Some of the older basic language business programs looked rough, but the programming as to what the app was supposed to do was 100 percent sound.

In fact there are probably hundreds of modern "pretty" apps that the business practices are totally incorrect. Such as the invoice / receipt mentioned.

Same with cad software, older autocad verses modern autocad. New is prettier yes, but the older not so prettified versions was still programmed accurately.

And an app can still look fine without things like:

  • rounded borders
  • fade in
  • various themes
  • etc

I have no problem with plain jane square borders and such.

An app can still look fine if styled plain.

Edit:

Another good example:

I also program in python. I use freecad and have been converting some sheet metal duct fittings from the basic language to python for flat pattern development. Like elbows, rectangular to round, ogee offsets, etc.

Their site https://forum.freecad.org/ is not as modernized (prettified) like laracasts.

But I don't care, I help others there and ask questions there. I like that forum. So the look of their forum to me is just fine.

It's to each his own. Sometimes I miss the old MSDOS days, the time before internet, MS Windows, etc.

I am from a time when we used logarithm tables in school to solve trig problems.

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