- Owner, Senior Consultant, System IntegratorDruga Derivacija d.o.o.2012 - PRESENT
- Developed an application using Java, SOAP, and Oracle that synchronizes data between ERP and commercial systems in a large gas distribution company.
- Developed an application that transfers measurements data from a gas measurement system to a commercial system in a large gas distribution company.
- Developed portlets for presentation of measurement data using IBM Websphere portal server, Java EE, JSF, JDBC, and Oracle.
- Developed the commercial system for a large gas distribution company, working as the application architect, senior developer, and team leader.
- Developed multiple pilot Android applications.
- Implemented statistical regression methods in PL/SQL that are used to forecast gas consumption.
- Developed native Android application that is used as the museum’s catalog. Application is running on the Android tablet with NFC functionality integrated, multimedia features, exhibits positioning on the museum floor sketch and multi language support.
- Prepared and configured a Raspberry Pi for playing and looping video for the museum exhibit installation.
- Worked on the proof of concept for image capturing and video streaming project implemented on the Rapsberry Pi with camera module on the client side and Java Spring Boot web application on the server side. Technologies/platforms used: Rapsberry Pi, GPIO, Python, Java, Spring Boot/JPA/Security, REST, AWS.
- Designed and developed the back-end module which provides a REST interface over the part of ERP database for a gas utility company.
- Designed and developed the native Android application for a gas utility company. The application is used by field workers to collect gas consumption data.
Technologies: Java, Android SDK, Spring, Hibernate, JavaScript, PL/SQL, Tomcat, IBM WebSphere - Expert Java DeveloperVineLight (via Toptal)2015 - 2016
- Created a data model in Dynamo DB.
- Used AWS Java SDK to work with AWS's Dynamo DB, IAM, and SES.
- Used Java and Spring framework to create a REST API around data stored in Dynamo DB.
- Configured and implemented security based on Spring security and OAuth2.
- Deployed a Java web application on AWS Elastic Beanstalk.
Technologies: Java, Spring Boot/JPA/Security, REST, OAuth2, AWS Elastic Beanstalk, AWS DynamoDB, AWS SDK for Java - Android DeveloperAudio Global, LLC (via Toptal)2015 - 2015
- Redesigned a complete UI and developed new features for this Android MP3 player application using NDK special native library, providing different tuning effects.
- Implemented in-app billing to provide a subscription model for the application.
- Published the application to the Google Play store.
- Ensured that the application was created to support a wide range of Android devices.
Technologies: Java, Android SDK, Android NDK - Senior Android DeveloperTeracode (via Toptal)2015 - 2015
- Developed an Android application for remote controlling a robot.
- Developed user interface elements according to strict requirement specifications and Android best practices.
- Communicated with the back-end via RESTful web services.
- Implemented business logic.
- Handled Agile project management with advanced usage of GitHub.
Technologies: Android, Android Annotations, Spring REST Client, Rally, GitHub - DeveloperTempleton Mortgage (via Toptal)2014 - 2015
- Fixed bugs in a custom application developed on the MS SQL platform with UI developed in MS Access.
- Added new features to the custom application developed on the MS SQL platform with UI in MS Access.
- Integrated with Google and Bing mapping services.
- Developed SQL procedures for automation of the business process.
- Optimized SQL queries.
Technologies: Microsoft SQL Server, Microsoft Access, Microsoft Visual Basic for Applications - UI DeveloperIddy (via Toptal)2014 - 2015
- Created an Android application for a gate entry proof-of-concept project.
- Integrated the application with access control and an identification system in the back-end.
- Displayed patron information in a fragment-based application running on the Android tablet.
Technologies: Android, Java, Apache HTTPClient, Oracle, PHP - DeveloperJohn Plunkett (via Toptal)2014 - 2014
- Created a pilot mail delivery service based on the Mailgun API service. Developed the system in Java. Used Mailgun REST API, Jersey, MySQL database, and H2 embedded database.
Technologies: Java, MySQL, H2, Mailgun REST API, Jersey, GSON - Senior Consultant, System Integrator, Application DeveloperRecro-net d.o.o. Zagreb2008 - 2012
- Developed the testing platform for the middleware for IPTV project for a large telecom and broadband provider.
- Developed the company's parking management system.
- Integrated and administered the Compuware Agentless system that measures EUE for enterprise users.
- Integrated and administered the Compuware VSC system for per-subscriber DSL troubleshooting and service delivery monitoring.
- Designed and implemented the business service management system for a large telecom provider using Compuware VSM system, JavaScript, Rhino, and Shell script.
- Developed multiple utility programs for integration of the Nagravision system (Direct-To-Home platform) with OSS/BSS systems.
- Developed the pilot application for integration with Subscriber Management System gateway using C-based API for messaging purposes.
- Developed widgets for Nagravision Direct-To-Home platform using JavaScript, PHP, and HTML.
Technologies: Java, C/C++/C#, JavaScript, Shell Script, Python - System Integrator, Application and System Developer, Support EngineerFornax Informatika d.o.o.2002 - 2008
- Integrated and maintained the fault management system and network management system for a large telco provider using IBM Tivoli Netcool/OMNIbus, Netcool/Impact, Netcool/Reporter, Netcool/Webtop, and Network Node Manager.
- Oversaw the system integration project for a mobile provider using Java, LDAP, and IBM Tivoli Netcool.
- Supervised the system integration project for a telco provider, integrating their trouble ticketing system and fault management system.
- Developed many utility programs and scripts on Unix systems for automation and integration purposes.
- Integrated the reporting system system based on Crystal Reports with a web application for presentation.
Technologies: Java, Unix Shell Scripting, Perl, HTML, JavaScript - Application Designer, System Designer, and DeveloperOKIT d.o.o. Zagreb2000 - 2002
- Designed, developed, and implemented the database application for the trouble call system for Distribution Utility using MS Visual C++, Visual Basic, Oracle, ODBC, and Crystal Reports.
- Developed back-end PL/SQL procedures to support fault management system and to automate tasks.
- Developed small commercial application specifically designed for companies dealing with DTP business using MS Visual Basic, MS Access, ADO, and Crystal Reports.
- Integrated the reporting system with commercial application.
Technologies: C/C++, Visual Basic, Crystal Reports - System and Database Administrator, Application DeveloperFED d.o.o. Zagreb1998 - 2000
- Provided system administration for the large marketing agency using MAC OS and Windows.
- Maintained the database using ACI 4th dimension and Oracle.
- Integrated data from commercial database with DTP programs (QuarkXPress) with purpose to automate newspaper page creation.
- Developed multiple small database applications in MS Access.
Technologies: C, 4th dimension, MS Access, Oracle - Application and Database Designer and DeveloperFotosoft d.o.o. Zagreb1994 - 1998
- Created many utility applications in C, which are used in cartography: Geometrical transformations (2D) applied on computer images, color analysis and separation applied on color images, and different filters based on geometrical recognition with given parameters.
- Developed the complete interactive program for analysis, recognition, and vectorization of curves used in cartography.
- Designed, programmed, and implemented a database application for a large marketing agency using 4 dimensions.
- Developed an application which transforms bitmap images to security vector graphic images using C.
- Created different filters based on geometrical recognition with given parameters using C and Adobe Photoshop.
Technologies: C, 4th Dimension, Clipper
