Dejan Milosevic, Software Developer in Fortaleza - State of Ceará, Brazil
Dejan Milosevic

Software Developer in Fortaleza - State of Ceará, Brazil

Member since November 29, 2015
Dejan has many years of experience working with top Java and JavaScript frameworks. He is proficient in Spring/JEE, HTML, CSS, and several popular JavaScript libraries, not to mention a complimentary fluency in the DB layer. Dejan is a powerful addition to any team due to his competency with version control systems (SVN/Git) and internal development tools (Ant/Maven), as well as his results-driven and flexible mindset.
Dejan is now available for hire


  • Finanex, Cyprus
    Lightstreamer, Apache Wicket, WebSockets, PostgreSQL, JBoss, EclipseLink...
  • Freelance
    PostgreSQL, MySQL, JBoss, Apache Tomcat, Hibernate, EJB3, Spring...
  • European Dynamics - Athens
    Orbeon Forms, EJB 3, MySQL, JBoss, Apache Tomcat, Spring, JavaScript, jQuery...



Fortaleza - State of Ceará, Brazil



Preferred Environment

Git, Eclipse

The most amazing...

...project I've worked on was a new financial instrument, a derivative of binary options, with integrated payment gateways and real-time money payments.


  • CTO

    2013 - 2015
    Finanex, Cyprus
    • Developed a stand-alone Java application that pushed data to different clients (HTML, Flash, iOS, Android).
    • Developed a web application in Wicket and integrated it with a front-end output.
    • Connected to payment gateways and executed real time money payments.
    • Connected to various third party APIs (MailChimp, GetResponse, Facebook, Lightstreamer, etc.).
    • Connected to market data providers with real time streaming quotes (IQFeed and Morningstar).
    • Investigated possible technologies for a project and made a selection based on a cost vs. functionality trade-off criteria.
    • Interviewed new candidates to join the team (for Java back-end and HTML + CSS front-end positions).
    • Prioritized and making strategic decisions based on available resources and business requirements.
    • Met with investors and affiliates, presenting technical details of a project.
    • Fully administered deployments on Amazon AWS (EC2, RDS) from the initial account creation to the working state of the servers.
    • Obtained and installed SSL/TLS certificates.
    • Managed DNS accounts.
    Technologies: Lightstreamer, Apache Wicket, WebSockets, PostgreSQL, JBoss, EclipseLink, Spring, JAX-RS, Java
  • Java Back-end and Web Developer

    2010 - 2013
    • Developed various web applications.
    • Modeled and administered MySQL and PostgreSQL databases.
    • Developed a rich web UI using Sencha Ext JS.
    • Created REST services and clients.
    Technologies: PostgreSQL, MySQL, JBoss, Apache Tomcat, Hibernate, EJB3, Spring, Apache Struts, Ext JS, JAX-RS, Java
  • Java Web Developer

    2007 - 2010
    European Dynamics - Athens
    • Developed business web applications for government e-procurement systems.
    • Worked on database modeling (MySQL).
    • Administered several deployments on client machines (Linux & Windows).
    • Analyzed client requirements.
    • Wrote precise use cases based on client requests.
    • Led a team of developers.
    Technologies: Orbeon Forms, EJB 3, MySQL, JBoss, Apache Tomcat, Spring, JavaScript, jQuery, JSP, Java
  • Java Web Developer

    2006 - 2007
    Komercijalna Banka AD, Belgrade
    • Developed enterprise web applications and web services.
    • Administered IBM WebSphere application server through the administrative console and additional scripting.
    • Developed stand-alone Java applications that run on legacy IBM mainframes.
    • Accessed and incorporated legacy CICS transactions from Java.
    • Administered IBM DB2 and Microsoft SQL Server databases.
    Technologies: JUnit, WebSphere MQ, ActiveMQ, WebSphere, Hibernate, Spring, Apache Struts, Servlet, JSP, Java
  • Back and Front-end Developer

    2005 - 2006
    BIS Beograd, Belgrade
    • Developed applications for financial bookkeeping and accounting.
    • Worked on database modeling.
    • Administered client installations on Windows and Linux machines.
    • Remotely assisted clients with technical issues.
    Technologies: UI


  • Belgian Public Procurement e-platform

    System for electronic public procurement for Belgian public institutions. Contains all steps in a procurement process including listing the projects, searching and narrowing down suppliers, and organizing the reverse e-auctions.

  • New Trading Platform

    A platform that offers a different approach to online trading. Individual traders face each other directly, instead of facing professional counterparts such as dealers and institutional investors whose capital, skills, information, and tools far exceed those of the individual investors.

  • REST Security with JWT using Java and Spring Security (Publication)
    Although the old, standardized security approaches work with REST services, they all have problems that could be avoided by using a better standard. For this, JWT arrives just in time to save the day. In this article, Toptal engineer Dejan Milosevic guides us on how to implement a JWT token-based REST API using Java and Spring Security.


  • Languages

    Java, HTML, SQL, Hibernate Query Language (HQL), JavaScript, HTML5, CSS3, CSS, C++
  • Frameworks

    JPA, JUnit, iBATIS, Hibernate, Spring Security, Spring MVC, Spring, Apache Struts, Apache Struts 2, JavaServer Pages (JSP), Jersey, Ext JS, JSP, Apache Wicket
  • Libraries/APIs

    MyBatis, jQuery, DBUnit, RESTEasy, JAX-RS, jQuery UI
  • Tools

    Servlet, Git, IntelliJ IDEA, Eclipse IDE, Apache Ant, Apache Tomcat, Subversion (SVN), Maven, ActiveMQ, Apache
  • Paradigms

  • Platforms

    JEE, Amazon Web Services (AWS), Eclipse, WebSphere MQ, JBoss, Windows, Linux, WebSphere
  • Other

    EclipseLink, EJB 3, CDI, EJB3, WebSockets, Lightstreamer, Orbeon Forms, UI
  • Storage

    JBoss AS, MySQL, PostgreSQL, Microsoft SQL Server, IBM Db2


  • Bachelor of Science Degree in Electrical Engineering
    2000 - 2006
    Faculty of Electrical Engineering, University of Belgrade - Belgrade, Serbia

To view more profiles

Join Toptal
Share it with others