Java Developer
2017 - PRESENTSedamIT d.o.o.- Developed a lawful interception system for monitoring telecom network traffic.
- Created an RMS system for active VoIP call recording.
Technologies: Spring, Maven, Eclipse, GitJava Developer
2013 - 2015Ericsson Nikola Tesla- Tested and coded a provisional gateway for HLR.
- Created support for LDAP by implementing openLDAP and custom Java LDAP servers.
- Built a high-performance LDAP server.
- Developed support for Linux tools.
- Optimized the TCP stack on Linux 2.6 and 3.0 kernel series.
Technologies: Java, Eclipse, Git, LinuxSoftware Tester
2011 - 2012Ericsson San Jose- Installed the Entrisphere/Ericsson BLM1500 multiplexer.
- Tested BLM1500 data, video, and voice services for the Spirent Test Center.
- Installed and supported Asterisk PBX for testing VoIP.
- Configured extreme L3 Switches.
- Troubleshot networks.
- Tested GPON access to the network with ONT terminal provisioning.
Technologies: GPON Broadband AccessIntegration and Verification Engineer
2008 - 2011Ericsson Nikola Tesla- Conducted support for test tools.
- Tested Linux-based elements of Telephony Softswitch Solution 4.0.
- Troubleshot and diagnosed network problems.
- Conducted SIP protocol analysis.
- Integrated site system testing via installation and configuration of TGC/MGW elements.
Technologies: Telephony SwitchesNetwork Administrator
2007 - 2007Siemens PSE- Supported the introduction of multicast in the company network.
- Created documentation for the network.
- Diagrammed network connections.
- Tested multicast on Cisco switches.
- Tested multicast across routers.
- Created final documentation and reported on test results.
Technologies: Cisco
VoIP Developer in Zagreb, Croatia
Member since April 9, 2014
Igor is an enthusiastic and skilled technology professional with experience in Java development, system administration, and more. He loves to experiment and work with new technologies, and has proven ability to learn whatever is necessary to solve a problem at hand.
Igor is now available for hire
Portfolio
- SedamIT d.o.o.Spring, Maven, Eclipse, Git
- Ericsson Nikola TeslaJava, Eclipse, Git, Linux
- Ericsson San JoseGPON Broadband Access
Experience
- Linux, 10 years
- VoIP, 9 years
- Java, 7 years
- Spring LDAP, 4 years
- SQL, 4 years
- Vaadin, 3 years
- LDAP, 3 years
- Spring 5, 2 years
Availability
Part-time
Preferred Environment
Eclipse, NetBeans
The most amazing...
...thing I've coded is a fast response to ldap request with precoded answers.
Employment
Experience
- SIP Load Balancer (Development)https://code.google.com/p/lb-sip/
A simple Java application which will do load balancing across several SIP servers, based on list, or periodic reports from SIP servers.
- VoIP Call Recording System (Development)
A Java-based back-end system for VoIP call recording that used Spring for back-end and Vaadin for UI.
SIP, RTP protocols, compression using G.729 standard. - Blagajna (Development)https://code.google.com/p/blagajna1/
A simple Java GUI application for issuing printed receipts on cashier systems, completed according to Croatian legislative requirements.
- Simple Management System (Development)http://git.toptal.com/Igor-Delac/igor-delac-2nd-attempt/wikis/home
A simple management front-end application coded in Java FX, to demonstrate REST approach and FX user interfaces. Back-end PHP and SQL scripts are also provided for integration into Apache web servers with a PHP module and MySQL database.
- Implementing a Remote Framebuffer Server in Java (Publication)Connecting to remote computers and working on them through terminals over a network is something we often take for granted. Technologies that enable us to do this have changed the way we work and have opened doors to amazing possibilities. Although the inner workings of these technologies may seem like obscure knowledge, implementations of many of these technologies are surprisingly straightforward. In this article, Toptal engineer Igor Delac gives us a step-by-step tutorial on how to implement the Remote Framebuffer server-side protocol in Java, allowing Swing-based applications to run and be interacted with remotely using standard VNC clients.
Skills
Paradigms
Procedural Programming, Event-driven ProgrammingPlatforms
Linux, UnboundIDLanguages
Java, Assembler, Bash, SQLFrameworks
Spring 5, VaadinTools
Eclipse IDEOther
Multicast, LDAP, VoIPLibraries/APIs
Spring LDAPStorage
PostgreSQL
Education
- Master's degree in Electrical and Software Engineering2002 - 2008J. J. Strossmayer University - Osijek
Certifications
- CCNAAPRIL 2012 - PRESENTCisco
