Archive for the ‘PHP’ Category
The competition in the server side programming department is getting tougher with each month, especially with the recent popularity of NodeJS. However let`s look how everything began.
PHP appeared about 20 years ago, in 1995 and ever since then it has been a number one language for back-end developers and has gathered a big community behind it. For a long time there wasn’t any good reason why not to use PHP: it`s rather easy to use PHP, it`s supported by the majority of hosting companies and it has become the most commonly used language in terms of number of websites powered by it.
Of course, everyone has his own truth: one coder will praise the speed of NodeJS while the other will be devoted to the stability and long history of PHP. But let`s have a look at strong sides of both for you to decide whether to concern yourself with the so popular nowadays NodeJS or not.
PHP strong sides:
– Huge community and tons of materials for all programmers, from a beginner to an advanced coder.
– Deep code base. The most popular platforms for building websites (WordPress, Drupal, Joomla) are written in PHP. Not only are the platforms open source, but so are most of their plug-ins.
– Easy to find a hosting company. PHP has been the industry standard since the stone age and any hosting company still surviving is bound to be compatible with it. For Node.JS you still need to make a little research.
– Simplicity. PHP can be run inside of the same file as html.
– Speed of coding. For most developers, writing PHP for Web apps feels faster: no compilers, no deployment, no JAR files or preprocessors — just your favorite editor and some PHP files in a directory.
– Mixing code with content. You just open up PHP tags and start writing code. No need for templates, no need for extra files or elaborate architectures.
– No client app is needed. All of the talk about using the same language in the browser and on the server is nice, but what if you don’t need to use any language on the browser? PHP is a way out.
NodeJS strong sides:
– Speed. NodeJS is blazing fast compared to PHP. This is where Node really kicks assJ.
– Separation of Concerns. NodeJS separates fundamental components up giving a clear separation of concern across controllers / routes, models and views.
– New and fresh. It’s newer in comparison to PHP and has been developed by programmers who have full knowledge and understanding of modern web applications, from the server to the client, and that means more modern features.
– JSON. NodeJS is a powerhouse for JSON. Accessing SQL is possible and there’s plenty of plugins that make it possible, but JSON is the lingua franca for interacting with many of the latest NoSQL databases.
– Gridlock. NodeJS uses a callback structure to pass logic from one asynchronous call to the next meaning we never have to worry about spawning new threads or even considering the deadlock process. Almost no function in Node directly performs I/O, so the process never block which is a major implication for scalable systems.
That is a difficult decision when it comes up to decide which language or tool to choose. But NodeJS worth considering and it`s proved by the fact that Node is getting more and more popularity every day. And what is your opinion on NodeJS, is it the future of web?
Building a website wasn’t so easy earlier as it is now. Fortunately the time has passed when you had to hand-code HTML and PHP scripts in order to get an easy and fully functional website. Now content management systems (CMSs) do most or all of the heavy lifting for site creators. There are a number of CMSs for serious site creators, but the most common for websites today are considered to be three open-source tools: Joomla, Drupal and WordPress.
WordPress is a free and open source blogging tool and a CMS based on PHP and MySQL. It got its start as a blogging platform in May 2003 and gradually evolved, first into a blogging system that let users add Web pages outside of the blog and then into a full-featured, popular CMS. Of the three most popular open-source CMSs – WordPress, Joomla and Drupal – WordPress is both the most popular and the fastest growing by far, according to Web technology tracker W3Techs.
Earlier anyone could hardly think of using WordPress as the blogging platform. But now the situation has changed completely. Every second site owner using a CMS chooses WordPress. But to be objective let’s see what the facts are that speak in favor of this star-CMS. And what are there against it?
It means you get access to its source code and can study, modify and improve it according to your needs. However, it doesn’t mean you can do anything at all with the code. WordPress is issued under GPL license, which restricts certain actions (like limiting access to the code for others etc).
* Installation doesn’t cost anything
However, you may need to pay for customization, app development, premium themes etc, but the basic installation is at no cost.
* Easy set-up
That’s not even advertised anymore. It is simple and it is also quick. WordPress is known for 5- minute’s installation time.
* “Friendliness” with users
What can be a better way to gain popularity among users that become friends with them? WordPress is well suited for all types of users, even those who had never suspected a site can possibly have a backend. If you are able to google WordPress site and register your account, if you know how to use a text processor, you’re sure to get well with your new WordPress blog or website.
* No problems with customization
With the number of free themes and plug-ins for adding functionality to your site bigger than in any other CMS, a user gets the rich choice of website appearance and features that don’t come by default. And their integration is usually as easy as installing WordPress itself.
* Community support
WordPress has the enormously big community of users – from new born WordPressers to seasoned pros. They do great job helping each other via community support forums and discussion boards. Apart from that, WordPress provides exhaustive documentation on every possible issue, to ease the life of its followers.
* Multisite feature
WordPress allows its users not to be limited with just one website or start every new site with the new WordPress installation. With Multisite feature that’s available with all versions starting from WordPress 3.0 you can manage your several sites within one admin interface. However, to use this feature successfully, you need to study the WordPress codex well and have certain administration skills.
The security of WordPress leaves much to be desired, as with majority of open-source software. The thing is, when anyone gets access to the code, it’s easy to find flaws in it and use them to get into a site. But it doesn’t mean you’ve got to buy the most expensive software, you just need to use the techniques to enhance the protection of your site integrity.
– Advanced theming/features
If you know no HTML and coding and are satisfied with the looks of your blog by just switching to a new theme – you’ll be fine. If you desire to start off by changing everything to your taste – you may be in need for professional help. As to adding more functionality to your site via various plug-ins, in most cases, the common ones work out great, but if you experiment too much with them, you may get stuck when one plug-in is not compatible with the other, some need upgrade and some require tweaking the code to work correctly.
– Maintenance Costs
Although considered one of the most affordable CMSs, WordPress still may require money to be running successfully. For example, you pay for hosting, if it’s not self-hosted, exclusive themes or plug-in development in case nothing free suits you.
WordPress: what to expect?
During 2012, WordPress didn’t undergo any major changes. There wasn’t much new in WordPress 3.4 except easier theme customization. WordPress 3.5 had a mildly different new theme, some media improvements and not much else. In contrast, WordPress 3.6, which is set for a release sometime in April-May 2013 feels like a big step forward. There’s a bold new theme and several useful new features.
• Twenty Thirteen:
Twenty Thirteen will be the new default WordPress Theme with increasing support for post formats. Unlike previous default WordPress theme this theme is going to have lots of bold colors and will be fully responsive.
• Navigation Menus:
Lots of beginners complain that WordPress Menu system is quite hard to understand. In WordPress 3.6 this navigation menu options have been simplified and it will become easier to create and manage Menus in WordPress.
• WordPress Post Formats:
In WordPress 3.6 there will be a new User interface for Post Formats and theme authors will also have access to template the individual functions to change the structured data.
• WordPress Auto Save:
There will be some great enhancements related to Auto Save function. Posts are now auto saved locally so if the browser crashes, the server goes down or internet connection fails you will not lose the post and you will be able to resume editing right where you left it.
• WordPress Post Revisions:
Upcoming WordPress version will be a better handler for your post revisions. The changes will be highlighted with different colors so you can modify the usual things easily.
• Post Lock:
WordPress 3.6 will have a better editorial feature built in called Post lock. It will allow the authors or website administrators to lock a post to kick other person out of the editing and gambling between posts.
No site or platform is perfect, but WordPress has so much to offer and is very easy to use. In my opinion, the advantages outweigh disadvantages and with new version of it things are only getting better. Do you agree? Are there any other pluses and minuses of WordPress that are essential in your opinion and that I didn’t mention in the article? I’m eager to see your comments
When planning the application you have to choose the right programming language to make your application work appropriate. The choice depends on many factors you need to consider. Such as but not limited: you need to think over on what platform the application will run, how easily new features would be added to the existing platform, the code size, performance, support and community etc.
There are various web programming languages and selecting the right one makes a website function properly. In my article I would like to focus on three of them, so called three “P”: PHP, Perl and Python to answer which of these languages is the best one.
Let’s have a look at them and try to make a comparison analysis
PHP – is free of charge open source scripting language and widely used in web environment. The best advantage of PHP is that it is easy to learn and easy to use. It is flexible and used for developing from small websites to giant business and organizational websites. Most common are informative forums, chatting platforms, CRM solutions, e-commerce shopping carts, community websites, e-business, shopping carts.
In terms of efficiency it is executed by the server and server parses the code at its source, executes and send properly formatted html to the client computer. Therefore it increases the speed of PHP applications.
What concerns the advantage of running, PHP is multiplatform language and compatible with all operating systems and platforms.
Being open source language, a large group of PHP developers help in creating a support community, so it’s maintained and when bugs are found, it can be quickly fixed.
A lot of websites including such giants as Wikipedia, Yahoo!, Facebiook, Digg, WordPress and Youtube are written in PHP. The popularity of PHP is based on its simplicity and coding style that is quiet easy to understand.
Nevertheless, the simplicity in developing, precisely principle so called «structure is not important» in PHP has its reverse side, precisely it’s hard to maintain for large applications since it is not very modular.
Also it’s weak in terms of security since its open source, all people can see the source code, and if there are any bugs it could be used to explore the weakness. About 30% of all vulnerabilities listed on the National Vulnerability Database are linked to PHP. The last summary on vulnerabilities you may find following the link: http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2013-0427
Perl –refer to all purpose languages. Perl was developed as a text editor for converting or processing large amounts of data for tasks such as creating reports. Nowadays it intended improvements and suited for web development, game programming, GUI development, popular among system administrators etc.
The Perl reusable code structure provides flexibility in apps development and at the same time creates the problem of code reading after. As there are so many ways to do, there are a lot more ways to mess up in what you’ve done. If the code was written without proper care, the reading could even take 6 months.
So from one hand Perl is a good language for small programs because of its messy syntax structure it’s hard to write and maintain large programs. On the other hand if you’re planning to develop big web application you need to consider good coordination between developers work on discussing the code stile, mentoring and managing work in the team.
In respect of vulnerability Perl takes the second place – 9.4%. I assume that it’s not bad taking into consideration its complexity and its long history.
It has fallen out of popularity lately a bit because of the slow development of Perl 6. Most people still use Perl 5.
Python – is considered to be very elegant programming language. It’s general purpose, high level programming language. On the one hand Python’s syntax and semantics are minimal; on the other it has complex standard libraries.
Python supports multiple paradigms: object-oriented, imperative and functional programming styles and has features including fully dynamic type system and automatic memory management.
In comparison with Perl Python is easy to read language. And its key idea is vice versa “there should be one—and preferably only one—obvious way to do it”. It means that the code written by one developer could be easily developed and supported by the others. Besides to delimit blocks Python uses whitespace indentation, rather than curly braces (C, C++, ….) or keywords (Delphi).
Python is often used as a scripting language, but is also used in 3D animation (Maya, Softimage XSI, Blender) and image editors (GIMP, Inkscape, Scribus, Paint Shop Pro). It was also used for writing several video games.
Python is actively used by Google, Yahoo!, CERN and NASA. But it has problems with popularity, precisely with spreading. The reason is that it’s less simple than PHP. Working with Python you need to learn numerical libraries. So that’s why some people prefer choosing PHP instead of Python. But only the betrayed ones could explain why they choose Python, the answer is easy the development on Python is faster on 30% and his vulnerability consists only 0.67% against 36% of PHP.
PHP at first sight seems to be a leader in this so called comparison race. It’s simple, easy to learn and efficient for building small and middle size websites. Going further with analysis in terms of scalable large system it turns out that here Python will perform better than PHP. The reason is in readability that makes Python easier to maintain and extend. Besides, Python is object-oriented. PHP is not. Moreover, Google supports Python with its Google App Engine where web sites can be hosted on Google’s server for free. What concerns Perl, analysis showed that it’s simple programming language with cross platform running and open source modular architecture that provides to develop interesting things. If the task is to perform administration scripts Perl is much better to use here than PHP.
After the analysis it follows that the choice any of three P is a good choice. Also it means that for a certain purpose there is a right tool to choose. Besides the analysis showed that all three “P” have in common the following:
• are cross platform;
• have open source code;
• have well written documentation;
• have large user communities;
• extend libraries and big amount of code written;
• have high-level frameworks (PHP – Symfony, php.MVC; Python-Django, CherryPy, Pylons; Perl -Catalyst, CGI::Application, Gantry);
So I hope that summary based on technical analysis we made could help to make a right decision in future web projects you might have.
Thank you for your attention and if you have anything to add, please feel free to leave a comment.
When selecting a web application framework for a particular development project, it’s very important to compare and consider the advantages and disadvantages of the different frameworks that are available. With so many PHP based web application frameworks, it can be difficult to choose one. For this blog post I’ll be focusing on a very promising PHP based web application framework Kohana.
Kohana is a PHP 5 framework that uses the Model View Controller (MVC) architectural pattern. It provides a rich set of components for building web applications. Its main purpose is to be safe, simple and easy to use, and so it is.
A little of history
Kohana was created as a branch of the PHP framework CodeIgniter. It was originally known as the Blue Flame. The main reason for “splitting” into two separate projects was a shift to a more open to the public development model due to the fact that many people were unhappy with the speed of development and fixing errors in CodeIgniter. Rick Ellis – creator and owner of CodeIgniter – was happy to see a fork of his project, but refused to help. He pushed a new project to create its own documentation and advised to rename the project. In July 2007 Blue Flame was renamed into Kohana to avoid copyright problems in the future. Developers began to look through the dictionaries of Native Americans to select a word that doesn’t violate copyright rights. Finally the name “Kohana” was chosen which in Sioux language means “swift”, which is absolutely true about this framework.
Why Kohana is an awesome framework
Although Kohana reuses many common design patterns and concepts, there are some things that make Kohana awesome and stand out. These are the most important of them:
1. Quick and easy development process. Kohana is really a very fast framework. With it you may build applications easily and quickly. There are many common components such as translation tools, database access, code profiling, encryption, validation, and more. Extending existing components and adding new libraries is very easy. While benchmarking a framework is hard and rarely reflects the real world, Kohana stands out as it is very efficient and carefully optimized for real world usage.
2. Community manageability. What is great about this framework is that it is community, not company, driven. Kohana development is driven by a team of dedicated people that need a framework for fast, powerful solutions. There exists a very active community forum and IRC (Internet Relay Chat) channel means that most questions are answered very quickly. Moreover, as it uses the BSD license (permissive free software license), you can use and modify it for commercial purposes.
3. A simple routing structure. Kohana has an excellent routing mechanism with which we can manage different kinds of URLs. For a URI, the routing mechanism will search for the first matching rout and the remaining will be ignored.
4. Kohana is OOP framework. It means that everything is built using strict PHP 5 classes and objects. It offers many benefits such as visibility protection, automatic class loading, overloading, interfaces, abstracts, and singletons.
5. Simple and effective debugging and profiling tools. Kohana has very simple and effective debugging and profiling tools that help to identify and solve performance issues very quickly.
6. No code generators and endless configuration files.There are no code generators and endless configuration files, so setting up is fast and easy.
7. Extremely lightweight. Kohana has no dependencies on PECL extensions or PEAR libraries. Large, monolithic libraries are avoided in favor of optimized solutions.
8. True auto-loading of classes. True on-demand loading of classes, as they are requested in your application. There are no namespace conflicts. All classes are suffixed to allow similar names between components, for a more coherent API.
9. Cascading resources offer unparalleled extensibility. Almost every part of Kohana can be overloaded or extended without editing core system files. Modules allow multi-file plug-ins to be added to your application.
10. Customization potential. Kohana has powerful event handler. Observer-style event handlers allow for extreme levels of customization potential.
To sum it up, Kohana is really an excellent framework because of many nice features incorporated in it. It is more scalable, flexible and light weight than many other well known frameworks. It is very fast, very efficient and carefully optimized for real world usage. So if you are looking for a feature rich, flexible, fast and sensibly configurable PHP framework, then look no further than Kohana.
Thank you for attention! As usual, please feel free to share your thoughts in comments.
It goes without saying that today’s market offers a wide array of web PHP frameworks that help programmers to develop applications and systems in a fast and easy way, thus considerably “relieving” their life. Among them are such great frameworks as Yii, Codeigniter, Zend, Cake PHP and Symfony. This article is about PHP framework known as Symfony. Starting as a private project for a company that wasn’t satisfied with the existing PHP frameworks, finally it has evolved into one of the most reliable and widely used enterprise PHP frameworks.
Symfony targets at quickening the creation and maintenance of web applications automating common tasks so that developers can focus only on the peculiarities of an application. It can be used for building robust applications in an enterprise context. This means that you have full control over the configuration: from the directory structure to the foreign libraries, almost everything can be customized. To match your enterprise’s development guidelines, Symfony is “packed” with additional tools helping you to test, debug and document your project.
Though there are a few indispensable conditions necessary for its installation: Linux, FreeBSD, Mac OS or Microsoft Windows, and a web server with PHP 5. The current version 1.2 supports only PHP 5.2 or higher, but the previous versions can be run on PHP 5.0 and 5.1 systems. Unfortunately, like many other new, modern frameworks, Symfony lacks support for PHP4, but, on the other hand, it is compatible with almost every RDBMS (Relational Database Management System) and has low performance overheads.
Developers as well as customers both benefit from using this great framework.
Benefits for business:
Business that decides to use Symfony as their PHP development framework can enjoy many benefits. First of all Symfony is heavily documented and easy to configure on most platforms. It is also easy to extend and it is compatible with many existing business libraries, methods and infrastructure making interaction with existing systems relatively easy, and its stability and long term plans make this framework an ideal choice at a business level. It is a project that will be maintained for a long time.
The only requirement is having PHP 5 installed. It doesn’t require a particular database engine, and by using ORM (Object-relational mapping) it keeps the database and data layers independent. All of this means no headaches for the IT or hosting help desk teams when the development environment is being configured.
Using Symfony will help your business develop better quality web applications, with testable and reusable code that can be adapted to the changing requirements of a business environment. And all this at no cost, since it’s an open source project running on open source technologies. For all those reasons, adapting Symfony can bring a lot of benefits to any web development business.
Benefits for developers:
1. Code testability and reusability:
As Symfony adheres to a strict object oriented language and MVC pattern, it gives programmers the possibility to create more beautiful and testable code. This code can be refactored and reused which saves you plenty of time in the overall development process. The code is heavily documented with PDF versions of books that can be downloaded freely from the official website, which helps to avoid long learning curve for developers.
2. Ease of configuration:
Symfony is easy to configure, as it employs a series of frequent configuration default values thus leaving the programmer to configure only things specific to the application being developed.
3. Development tools:
Symfony includes a wide variety of useful command line tools to help with development and project management. You will use these tools to do things such as automatically generating your Propel model classes (Symfony Framework is independent of database due to the ORM layer “Propel” or “Doctrine”), scaffolding, clear cache, etc.
4. Plug-in Creation:
When you happen to add a feature to the framework, all you have to do is to simply create a plug-in in a directory that you can later copy to all your projects. This is one of its most striking features which saves on time immensely and benefits enormously. Most of time you are able to find a plug-in that implements a specific feature that you may need. If not, you can find something close and customize it to your needs. In case nothing you want exists, it’s really easy to create a plug-in yourself.
5. Advanced cache system:
The framework has extensive built-in caching features. It is easy to configure view caching so that whole pages or fragments are cached. It is also very easy to extend the base cache classes so that you can create in a fast way your own custom caching for data.
Does Symfony fit me?
No matter if you are a PHP guru or new to web application development. You will be able to use Symfony anyway. The most important thing for you to define is the size of your project. If you are planning to develop a simple site not exceeding 5-10 pages, with limited access to a database, then you’d probably better use PHP alone. Because using a web application framework won’t give you much, and using object orientation or a MVC model would probably only slow down your development process. Besides Symfony is not optimized to run effectively on a shared server where PHP scripts can run only in Common Gateway Interface (CGI) mode.
If you are going to develop more complex web apps, then plain PHP is not enough. If you want to develop fast and easy, then Symfony perfectly fits you. More over, if you plan maintaining and extending your app in the future, you need a lightweight and effective code. In this case Symfony is a right solution.
If you want to see how fast and convenient it is to develop with Symfony, visit Symfony’s official website to have a look to a visual demonstration of how this framework works.
Good luck and looking forward to seeing your comments!:)
Before you read the article I would like to notice that it’s just a subjenctive opinion
So, what is PHP4 and ASP.Net? ASP.NET – is not a continuation of ASP, but is conceptually a new Microsoft technology, created as part of ideology. NET. Key stakeholders of .NET are scalability, cross-language interaction and shaky concept of “safe programming”.
PHP is conversely an open and free technology. Of course, it would be wrong to decipher PHP as Personal Home Page today, but we still can hear echoes from the past to these days. PHP is a scripting language, created exclusively for dynamic HTML output. This does not mean that it is impossible to create a major project, this means that a large project for PHP is expensive and difficult.
Programming in PHP does not require an expensive programming environment. It would be enough a textbook to learn how to write more or less workable scripts. But it doesn’t work with ASP.NET. There is nothing to do without Visual Studio, MSDN and sometimes access to internet. Most part of time anovice developer spends on studying MSDN. By that time when he have learnt heaped model of classes and all the necessary functions, Microsoft probably will come up with something new. But if you could learn it…
Using ASP.NET with Visual Studio it looks like to work with Delphi. The main languages in which applications written in ASP.NET are Visual Basic.NET and C #, respectively, are the heirs Visual Basic и Java/C++.Theoretically, under ASP.NET, you can write programs in any language for which there is a corresponding compiler. However, in practice, to create ASP.NETapplications are mainly used Visual Basic.NET and C #. “Native” environment of ASP.NET is IIS, running Windows. And yes, IIS is not known as the most stable web server, and Windows – is not the most stable operating system.
ASP.NET does not suit for small projects, and even more – for a few triggered groups that do not require precise control. The causes are many – from the high cost of the platform and ending with the complexity of the model classes.NET. When you collide with .Net you could think who could understand and learn it all? But then you understand – nobody. The credo of .Net is not to go to own business, write your module, learn its functions, know your place – this principle works fine in the collective .
In the ideology of Microsoft a programmer is a small cog in a well-established mechanism, singles have never been considered. Thus large projects accrue for .Net.
Thus there are no places for PHP programmers in such projects. Why? Because they will require a lot of coordinators, who must be paid. Most part of coordination in .Net takes over itself. PHP technology is fundamentally different from ASP.NET. PHP resembles a mixture of C and Perl with a little spice of Basic and Pascal. But ASP.Net looks like a classic
PHP4 trusts developers so much and there are no types, to declare variables is not necessary. PHP syntax is made for a quick and simple solution of common problems. The entire responsibility of dangerous stunts belongs to the programmer, what in particular leads to the widespread phenomenon, as the discovering of serious errors in the code one month after delivery of the project. The sphere of PHP is not large, it is small projects, which developed by either one specialist or a closely work group . As PHP is free the language has become an ideal choice for SMB or copyrights
Speed. Theoretically, ASP.NET must run faster as we deal with once compiled binary code, whereas PHP-scripts are re-processed each time. However, PHP work on IIS and Apache with a great load (although artificially induced) and always produces better results than ASP.NET even better then .ASP classic.The ligament PHP + MySQL + Apache works better and faster than ASP.NET + IIS + Microsoft SQL Server 2000.
Does it mean that ASP.NET is worse? I don’t think so. The speed is assured that all PHP applications run in a single address space, when ASP.NET checks and double checks the data repeatedly, keeping each application in a separate address space.The first pproach is faster but less reliable, the second – is more reliable, but there is a price. Unfortunately miracles do not happen L.
About work . Briefly describe the feeling to work with PHP it is constant process of debugging this is to the fact that the language contributes serious logical errors.
Even primitive typo (highlighted in red) leads to a logical error, which would not be in C# in principle. In general, there is not any declaration of variables in PHP, which is a big minus.
Also as a rule, updating version of PHP on the server is a headache for customers and programmers. Sometimes it is very difficult to find a mistake, especially if it appears only under certain circumstances, so that it could be never revealed to the delivery of the project. It is strength and weakness of PHP. When you plan in C# and write different classes , interfaces for collections to create a page in one fell swoop for ten minutes then. In PHP you could create the page several. Still every next page is created in 10 mins on ASP.Net when in PHP you would spend the same time again and again.. If you need to change smth on the page visually, you would need 5 mins in ASP.Net, but in PHP you would need look for and change HTML.
Thus small and medium projects are fate for small groups of PHP programmers; when medium and medium and large – the inheritance of large groups, using products of Microsoft, and giant projects share between HP, IBM, Sun, Oracle, and prices are too higher, but this is another story J
Thus in conclusion I would like to notice at the beginning pace of ASP.Net development should fall sharply, then grow steadily and eventually stop at a certain level, whereas the opposite is true in PHP.
Thank you for your attention!
Elvira Golyak – Business Development Manager (LI page)
Elvira.Golyak@altabel.com | Skype ID: elviragolyak
Altabel Group – Professional Software Development