Crystal Business Center

ул. "Осогово" 40, Sofia, Bulgaria, 1303

Crystal Business Center is located in the central part of Sofia, on the corner of "Osogovo" street. and "Todor Aleksandrov...

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Explore Our Courses

Continuous Integration (CI) for Java

 14 Hours
This instructor-led, live training in Sofia (online or onsite) is aimed at developers who wish to learn and apply the basics of Continuous Integration for Java. By the end of this training, participants will be able to:
  • Learn and understand CI for a Java project.
  • Build a CI system for Java.
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Java 16

 14 Hours
This instructor-led, live training in Sofia (online or onsite) is aimed at programmers who wish to use Java 16 to build, manage, and package Java applications. By the end of this training, participants will be able to:
  • Learn and understand the new features and changes from the older versions of Java to Java 16.
  • Learn Java fundamental concepts and use them to build Java applications.
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Introduction to Programming

 35 Hours
The purpose of the training is to provide a basis for programming from the ground up to the general syntax of programming paradigms. The training is supported by examples based on programming languages ​​such as C, Java, Python, Scala, C #, Closure and JavaScript. During the training, participants gain a general understanding of both the programming patterns, best practices, commonly used design and review of the implementation of these topics through various platforms. Each of the issues discussed during the course are illustrated with examples of both the most basic and more advanced and based on real problems.
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Clean Code

 14 Hours
Why do we need Clean Code? Programs evolve, therefore the code is continuously updated it can be very, very difficult to go back through unclean code to find and update the source code on average, the cost of writing the original code is only 40% of the total cost of a system; 60% of the cost, on average, is spent maintaining and updating code. Bad code dramatically increases that 40/60 ratio, bordering on 20/80 in the worst cases; the more unclean the code is, the more time we just spend updating it.
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Linux Network Programming

 14 Hours
This course is addressed to junior software developers. After the course completion, the trainees will be able to understand the architecture of well-known web servers such as Apache or Nginx, and implement their own network programs. The course is 67% lectures, 33% hands-on exercises.
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Java Advanced

 28 Hours
During the training participant will know the specific use of selected issues, the basic problems encountered when using them, and the role of the application model. The training also includes a basic knowledge of the language standard library functions. Training requires knowledge of the development environment IDE used to build Java applications (e.g.. Eclipse, Netbeans). Training does not include a user interface issues.
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Combined C/C++, JAVA and Web Application Security

 28 Hours
To serve in the best way heterogeneous development groups that are using various platforms simultaneously during their everyday work, we have merged various topics into a combined course that presents diverse secure coding subjects in didactic manner on a single training event. This course combines C/C++ and Java platform security to provide an extensive, cross-platform secure coding expertise. Concerning C/C++, common security vulnerabilities are discussed, backed by practical exercises about the attacking methods that exploit these vulnerabilities, with the focus on the mitigation techniques that can be applied to prevent the occurrences of these dangerous bugs, detect them before market launch or prevent their exploitation. Security components and service of Java are discussed by presenting the different APIs and tools through a number of practical exercises where participants can gain hands-on experience in using them. The course also covers security issues of web services and the related Java services that can be applied to prevent the most aching threats of the Internet based services. Finally, web- and Java-related security vulnerabilities are demonstrated by easy-to-understand exercises, which not only show the root cause of the problems, but also demonstrate the attack methods along with the recommended mitigation and coding techniques in order to avoid the associated security problems. Participants attending this course will
  • Understand basic concepts of security, IT security and secure coding
  • Learn Web vulnerabilities beyond OWASP Top Ten and know how to avoid them
  • Learn client-side vulnerabilities and secure coding practices
  • Learn to use various security features of the Java development environment
  • Have a practical understanding of cryptography
  • Realize the severe consequences of unsecure buffer handling
  • Understand the architectural protection techniques and their weaknesses
  • Learn about typical coding mistakes and how to avoid them
  • Be informed about recent vulnerabilities in various platforms, frameworks and libraries
  • Get sources and further readings on secure coding practices
Audience Developers
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Advanced Java Security

 21 Hours
Even experienced Java programmers are not mastering by all means the various security services offered by Java, and are likewise not aware of the different vulnerabilities that are relevant for web applications written in Java. The course – besides introducing security components of Standard Java Edition – deals with security issues of Java Enterprise Edition (JEE) and web services. Discussion of specific services is preceded with the foundations of cryptography and secure communication. Various exercises deal with declarative and programmatic security techniques in JEE, while both transport-layer and end-to-end security of web services is discussed. The use of all components is presented through several practical exercises, where participants can try out the discussed APIs and tools for themselves. The course also goes through and explains the most frequent and severe programming flaws of the Java language and platform and web-related vulnerabilities. Besides the typical bugs committed by Java programmers, the introduced security vulnerabilities cover both language-specific issues and problems stemming from the runtime environment. All vulnerabilities and the relevant attacks are demonstrated through easy-to-understand exercises, followed by the recommended coding guidelines and the possible mitigation techniques. Participants attending this course will
  • Understand basic concepts of security, IT security and secure coding
  • Learn Web vulnerabilities beyond OWASP Top Ten and know how to avoid them
  • Understand security concepts of Web services
  • Learn to use various security features of the Java development environment
  • Have a practical understanding of cryptography
  • Understand security solutions of Java EE
  • Learn about typical coding mistakes and how to avoid them
  • Get information about some recent vulnerabilities in the Java framework
  • Get practical knowledge in using security testing tools
  • Get sources and further readings on secure coding practices
Audience Developers
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Combined JAVA, PHP and Web Application Security

 28 Hours
Even experienced programmers do not master by all means the various security services offered by their development platforms, and are likewise not aware of the different vulnerabilities that are relevant for their developments. This course targets developers using both Java and PHP, providing them essential skills necessary to make their applications resistant to contemporary attacks through the Internet. Levels of Java security architecture are walked through by tackling access control, authentication and authorization, secure communication and various cryptographic functions. Various APIs are also introduced that can be used to secure your code in PHP, like OpenSSL for cryptography or HTML Purifier for input validation. On server side, the best practices are given for hardening and configuring the operating system, the web container, the file system, the SQL server and the PHP itself, while a special focus is given to client-side security through security issues of JavaScript, Ajax and HTML5. General web vulnerabilities are discussed by examples aligned to the OWASP Top Ten, showing various injection attacks, script injections, attacks against session handling, insecure direct object references, issues with file uploads, and many others. The various Java- and PHP-specific language problems and issues stemming from the runtime environment are introduced grouped into the standard vulnerability types of missing or improper input validation, improper use of security features, incorrect error and exception handling, time- and state-related problems, code quality issues and mobile code-related vulnerabilities. Participants can try out the discussed APIs, tools and the effects of configurations for themselves, while the introduction of vulnerabilities are all supported by a number of hands-on exercises demonstrating the consequences of successful attacks, showing how to correct the bugs and apply mitigation techniques, and introducing the use of various extensions and tools. Participants attending this course will
  • Understand basic concepts of security, IT security and secure coding
  • Learn Web vulnerabilities beyond OWASP Top Ten and know how to avoid them
  • Learn client-side vulnerabilities and secure coding practices
  • Learn to use various security features of the Java development environment
  • Have a practical understanding of cryptography
  • Learn to use various security features of PHP
  • Understand security concepts of Web services
  • Get practical knowledge in using security testing tools
  • Learn about typical coding mistakes and how to avoid them
  • Be informed about recent vulnerabilities in Java and PHP frameworks and libraries
  • Get sources and further readings on secure coding practices
Audience Developers
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Standard Java Security

 14 Hours
Description The Java language and the Runtime Environment (JRE) was designed to be free from the most problematic common security vulnerabilities experienced in other languages, like C/C++. Yet, software developers and architects should not only know how to use the various security features of the Java environment (positive security), but should also be aware of the numerous vulnerabilities that are still relevant for Java development (negative security). The introduction of security services is preceded with a brief overview of the foundations of cryptography, providing a common baseline for understanding the purpose and the operation of the applicable components. The use of these components is presented through several practical exercises, where participants can try out the discussed APIs for themselves. The course also goes through and explains the most frequent and severe programming flaws of the Java language and platform, covering both the typical bugs committed by Java programmers and the language- and environment-specific issues. All vulnerabilities and the relevant attacks are demonstrated through easy-to-understand exercises, followed by the recommended coding guidelines and the possible mitigation techniques. Participants attending this course will
  • Understand basic concepts of security, IT security and secure coding
  • Learn Web vulnerabilities beyond OWASP Top Ten and know how to avoid them
  • Learn to use various security features of the Java development environment
  • Have a practical understanding of cryptography
  • Learn about typical coding mistakes and how to avoid them
  • Get information about some recent vulnerabilities in the Java framework
  • Get sources and further readings on secure coding practices
Audience Developers
Read more...

Java and Web Application Security

 21 Hours
Description Beyond solid knowledge in using Java components, even for experienced Java programmers it is essential to have a deep knowledge in web-related vulnerabilities both on server and client side, the different vulnerabilities that are relevant for web applications written in Java, and the consequences of the various risks. General web-based vulnerabilities are demonstrated through presenting the relevant attacks, while the recommended coding techniques and mitigation methods are explained in the context of Java with the most important aim to avoid the associated problems. In addition, a special focus is given to client-side security tackling security issues of JavaScript, Ajax and HTML5. The course introduces security components of Standard Java Edition, which is preceded with the foundations of cryptography, providing a common baseline for understanding the purpose and the operation of the applicable components. The use of all components is presented through practical exercises, where participants can try out the discussed APIs and tools for themselves. Finally, the course explains the most frequent and severe programming flaws of the Java language and platform. Besides the typical bugs committed by Java programmers, the introduced security vulnerabilities cover both language-specific issues and problems stemming from the runtime environment. All vulnerabilities and the relevant attacks are demonstrated through easy-to-understand exercises, followed by the recommended coding guidelines and the possible mitigation techniques. Participants attending this course will
  • Understand basic concepts of security, IT security and secure coding
  • Learn Web vulnerabilities beyond OWASP Top Ten and know how to avoid them
  • Learn client-side vulnerabilities and secure coding practices
  • Learn to use various security features of the Java development environment
  • Have a practical understanding of cryptography
  • Learn about typical coding mistakes and how to avoid them
  • Get information about some recent vulnerabilities in the Java framework
  • Get practical knowledge in using security testing tools
  • Get sources and further readings on secure coding practices
Audience Developers
Read more...

Advanced Java, JEE and Web Application Security

 28 Hours
Beyond solid knowledge in using Java components, even for experienced Java programmers it is essential to have a deep knowledge in web-related vulnerabilities both on server and client side, the different vulnerabilities that are relevant for web applications written in Java, and the consequences of the various risks. General web-based vulnerabilities are demonstrated through presenting the relevant attacks, while the recommended coding techniques and mitigation methods are explained in the context of Java with the most important aim to avoid the associated problems. In addition, a special focus is given to client-side security tackling security issues of JavaScript, Ajax and HTML5. The course introduces security components of Standard Java Edition, which is preceded with the foundations of cryptography, providing a common baseline for understanding the purpose and the operation of the applicable components. Security issues of Java Enterprise Edition are presented through various exercises explaining both declarative and programmatic security techniques in JEE. Finally, the course explains the most frequent and severe programming flaws of the Java language and platform. Besides the typical bugs committed by Java programmers, the introduced security vulnerabilities cover both language-specific issues and problems stemming from the runtime environment. All vulnerabilities and the relevant attacks are demonstrated through easy-to-understand exercises, followed by the recommended coding guidelines and the possible mitigation techniques. Participants attending this course will
  • Understand basic concepts of security, IT security and secure coding
  • Learn Web vulnerabilities beyond OWASP Top Ten and know how to avoid them
  • Learn client-side vulnerabilities and secure coding practices
  • Learn to use various security features of the Java development environment
  • Have a practical understanding of cryptography
  • Understand security concepts of Web services
  • Understand security solutions of Java EE
  • Learn about typical coding mistakes and how to avoid them
  • Get information about some recent vulnerabilities in the Java framework
  • Get practical knowledge in using security testing tools
  • Get sources and further readings on secure coding practices
Audience Developers
Read more...

Getting Started with Eclipse IDE for Java

 7 Hours
Eclipse is an Integrated Development Environment (IDE) most commonly used for Java programming. In this instructor-led, live training, participants will learn how to use the Eclipse IDE for Java. By the end of this training, participants will be able to:
  • Understand the different functionalities of the Eclipse IDE
  • Learn how to set up the Eclipse IDE for Java development
  • Create and run their first Java application in Eclipse
  • Learn various tips and tricks on how to use the Eclipse IDE efficiently
Audience
  • Java developers interested in using the Eclipse IDE
Format of the course
  • Part lecture, part discussion, exercises and heavy hands-on practice
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Gosu Programming

 7 Hours
This instructor-led, live training in Sofia (online or onsite) is aimed at programmers who wish to download, install, and implement Gosu's static typing and pragmatic approach in programming. By the end of this training, participants will be able to program using Gosu to write simple scripts for libraries, user interface elements, rules, and more.
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Developing in Java Programming for OO Developers

 28 Hours
Objectives This 4 day course is aimed at object-oriented developers (e.g. C++ or C#) who need to get up to speed quickly in Java. The course covers the Java programming constructs and APIs quickly, focussing on the differences between Java and other OO languages. Audience This training course is aimed at OO developers who need to transition into Java.
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Functional Reactive Programming with Java 9 and RxJava

 14 Hours
In this instructor-led, live training in Sofia, participants will learn the advantages and functions of Java 9, Spring, Jersey, and RxJava 2.0 in developing reactive applications as they step through the creation and deployment of a real-life reactive application using Java 9's flow API, Spring, the Akka framework, and RxJava 2.0 functional reactive programing library. By the end of this training, participants will be able to:
  • Understand the importance and significance of reactive programing in applications and systems development.
  • Run Unit test on RxJava 2.0.
  • Use the Akka framework under reactive programing principles.
  • Employ Spring to handle the development of concurrent applications.
  • Use Java 9's flow API to develop reactive apps.
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Java 10 Core Features for Developers

 7 Hours
This instructor-led, live training in Sofia (online or onsite) is aimed at developers who wish to reinforce their knowledge of Java 10 and utilize to create, build, test, debug and deploy enterprise applications. By the end of this training, participants will be able to:
  • Set up the necessary development environment to start developing with Java 10.
  • Make use of the essential features of Java 10 to develop an application.
  • Comprehend the principles behind the Java 10 update and apply it to application enhancements.
  • Recognize and consider the potential of Java 10 implementations for other ventures.
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Java 11

 14 Hours
This instructor-led, live training in Sofia (online or onsite) is aimed at developers and programmers who wish to build, manage, and execute Java applications using Java 11. By the end of this training, participants will be able to:
  • Migrate from older Java versions to Java 11 to implement new features and changes in the platform.
  • Explore new methods in Java 11 to enhance and simplify application development.
  • Learn Java core concepts to build applications for various systems and devices using Java 11.
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Java 9 Fundamentals and Features

 14 Hours
This instructor-led, live training in Sofia (online or onsite) is aimed at developers who wish to use Java 9 and its features to create, build, test, debug and deploy enterprise applications. By the end of this training, participants will be able to:
  • Set up the necessary development environment to start developing using Java 9.
  • Understand the specifications of the Java 9 upgrade.
  • Employ Java 9 features to enhance the performance of applications.
  • Perceive the potential of Java 9 as a tool for other enterprise implementations.
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Java Advanced - one day

 7 Hours
Introduces contect for Advanced java programmers, usually developing large scale applications, frameworks or libraries. This course is mostly labs (around 60%), the rest is discussions and presentation. We mostly use the newest version of Java for this course, but it can also be delivered as a private course on older versions of Java.
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Java Fundamentals

 28 Hours
The course covers the basics of Java development. It introduces students to Java technology and teaches them basic Java syntax and concepts, leading to the creation of a simple program. Training goes through the essential concepts and features of the Java Programming Language, focusing on exceptions, basic input/output, concurrency, regular expressions, Java collections framework and the platform environment. The course finishes when all basic Java features have been explained and trained.
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Java Fundamentals for Android

 14 Hours
Applications for the Android platform are developed primarily in Java. This course was developed for software programmers with a strong OOP background (whether in PHP, Scala, C++, C# or Objective C) that plan to learn how to develop Java applications for the android platform. This course covers the Java programming language grammar and focuses on those specific Java capabilities the android platform uses more than others.
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Java fundamentals with Maven

 28 Hours
The course covers the basics of Java development and introduces the Apache Maven software project management and comprehension tool.
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Creating Modern GUI Applications with JavaFX

 21 Hours
JavaFX is a GUI library available in the latest version of Java JDK. It contains a collection of graphics and media packages for designing, creating, testing, debugging, and deploying rich client applications that operate consistently across multiple platforms. In this onsite instructor-led, live training, participants will learn how to develop rich user interfaces using Java's powerful GUI library, JavaFX. By the end of this training, participants will be able to:
  • Create a modern, visually-pleasing Java application using JavaFX
  • Integrate JavaFX into legacy Swing and SWT based Java applications
  • Add 3D graphics and effects to their application
  • Test and debug their Java application
  • Deploy the application to the web or as a desktop application
Audience
  • Application developers
  • Web developers
Format of the Course
  • Part lecture, part discussion, exercises and heavy hands-on practice
Note
  • To request a customized training for this course, please contact us to arrange.
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Java Intermediate - one day

 7 Hours
Participants who are already Java programmers who want to extend their horizon and used more Java language concepts.
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Java Intermediate and Advanced

21 Hours
Participants who are already Java programmers who want to extend their horizon and used more Java language concepts.
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Java and Kubernetes for DevOps Engineers

 21 Hours
This instructor-led, live training Sofia (online or onsite) is aimed at DevOps engineers and developers who wish to use Java and Kubernetes (K8s) to create, build, test, debug and deploy high-performance and scalable applications. By the end of this training, participants will be able to:
  • Set up the necessary development environment to build Java applications.
  • Understand the features and architecture of Kubernetes.
  • Learn about the key concepts and tools for DevOps.
  • Get a refresher on Java programming fundamentals.
  • Containerize Java microservices using Docker.
  • Build, scale, and deploy Java applications on Kubernetes.
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Java Performance

 21 Hours
The course is intended for Java programmers who want to produce efficient applications. After consultation with client, the course can be conducted in a special tool version, for people who only need to detect performance problems (testers, administrators) - in this case programming in Java is not required. During the training, participants will learn about process and modern tools for producing efficient software in Java. They learn performance-related traps, benchmarking, profiling, tuning, memory analysis, performance tricks using collections or IO. Learned topics and tools are applicable regardless of the technologies used in the project, because we focus on language-level performance, tools and embedded libraries. Tuning discusses parameters of JVM provided by Oracle.
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Java Persistence with Hibernate

 14 Hours
This course teaches the practical use of Hibernate for persisting Java objects in a relational database.
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Java Programming

 35 Hours
During the training participants will learn how to write basic programs In Java, test it, use standard libraries and create multi-threaded applications.
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Testimonials (25)

Shane is very experienced, knowledgeable, and willing to help and explain when people have questions. I liked most that Shane creates an atmosphere in which asking questions is safe and encouraged, which is extremely important to learning in my opinion.

Ryan
Course - C# for Automation Test Engineers

Tailored to our needs

Rafał - Haleon
Course - C#.Net

LAB practice with exercises

Angel - Vodacom
Course - Java Programming

Pushing changes on an ongoing basis, when on the 3rd day I started to get more lost than before and it was harder to spot the error quickly, I was quickly able to check out the latest changes and stay up to date with the material

Paulina
Course - Advanced Java Security

Machine Translated

The participants

Arne Schwarck - Diehl Aviation Laupheim GmbH
Course - Javascript Basics

The many examples and the building of the code from start to finish.

Toon - Draka Comteq Fibre B.V.
Course - Introduction to Image Processing using Matlab

Very "hands-on" training, with lots of examples and explanations. I really enjoyed it and I feel like a learned many new things in a very short time. Very well done!

Sorina - DB Global Technology
Course - JavaScript - Advanced Programming

The practical sessions

Tshepo - Vodacom
Course - HTML5, JavaScript, and CSS4

A large amount of practical knowledge shown in real-life examples.

Kamil - Streamsoft Kraków
Course - Java Advanced

Machine Translated

accessible way of transmitting knowledge

Bartłomiej - Politechnika Łódzka
Course - Java 16

More time for this course.

Rubén Dimas Escorza - si

Machine Translated

The course, The Trainer

Novat Adam - Tanzania Revenue Authority
Course - Unit Testing with Javascript

I enjoyed the interactivity and the fact that the trainer had a good balance regarding how deep he went into some topics and regarding "feeling the crowd" so to speak. It makes you feel like you are part of the learning program, and not as if you are here just to listen and if you understand, ok, if not, unlucky, no one cares. Great job considering participants' feedback!

Alexandru - Pirelli
Course - JSON JavaScript

exceptional trainer I would like to salute for his methodology and wide range of subject matter expertise

Mahdi Alami Hamedane - Dubai Courts
Course - Java Fundamentals

I really like the exercises

Ioan Adrian Gui - Bachner - Continental Automotive (avlad)
Course - Unity: Developing 3D Games with C# and Javascript

The teacher addressed many relevant topics for clean coding with practical examples.

Ben van Oeveren - Movella
Course - Clean Code

His ability to teach me through real-life examples, and his immediate response to my question with a clear and understandable answer.

Zayed Al Kindi
Course - HTML5, JavaScript, and CSS3

Trainer was good at talking through topics in details and making it easy to understand

Lewis Nangle - AquaQ Analytics
Course - Java Performance

It was interactive, I could ask many questions and the instructor would modify his lecture to answer my questions

Cynthia Rodriguez - RoyalRoads University
Course - Programming using ASP.NET MVC 4

The exercises

Florin Mazilu - SOJUS Software GmbH & Co. KG
Course - Unit Testing with JUnit

Though an online training, the interactivity with the trainer was remarkable and was always available to provide valuable sources to complement the training. I am very satisfied.

Nuno Marques - MULTICERT, S.A.
Course - Functional Reactive Programming with Java 9 and RxJava

Very good knowledge and character.

Constantinos Michael
Course - Java and Web Application Security

I liked the very practical scenario and lot of hands-on exercises.

Michel PRAYAG
Course - Java fundamentals with Maven

I appreciated Folio's wide breadth of knowledge. Not only was he familiar with the course content, but he also knew of constructs in languages we were familiar with to make examples more meaningful to us. During intervals he shared his knowledge of technologies and solutions outside the training scope to provide insights into other solutions we could use in future (and future training).

Raphael - Markit Valuations Limited
Course - Developing Desktop Applications with Visual Studio 2012, VB.NET and SQL Server 2012

It was interactive. We got to code as we went.

Barnaby
Course - Ext JS Fundamentals

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