07/01/2026 updated

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Senior Java Developer / Consultant

Zabok, Croatia
Germany +2
info: Germany, Austria, Switzerland
Ms.Sc. Computer Science (diploma engineer), Faculty of Electrical Engineering and Computing, Zagreb
Zabok, Croatia
Germany +2
info: Germany, Austria, Switzerland
Ms.Sc. Computer Science (diploma engineer), Faculty of Electrical Engineering and Computing, Zagreb

Profile attachments

Hrvoje_Djurdjevic_Java_Developer.docx

About me

Experienced Java/Spring software engineer and tech lead (18+ years). I lead technical initiatives and contribute individualy. Had roles in design, development, deployment, testing and optimization in many projects from various industries like Fintech, Telecom, Energy, Banking, Government, etc.

Web InterfacesJava (Programming Language)XML SchemaSpring SecurityApache ActiveMQApache TomcatDatabasesContinuous IntegrationDB2 SQLSoftware Design PatternsLinuxGradleHibernateIBM WebSphere MQJava ArchitecturesSpring FrameworkJava API For RESTful Web Services (JAX-RS)Java Architecture for XML BindingJavaserver PagesPostgreSQLApache MavenOpenShiftOracle DatabasesSoftware ArchitectureRedisSimple Object Access Protocol (SOAP)Software EngineeringUMLWeb Application FrameworksWeb ServicesJettySpring BootGitLabGitSpring DataBackend ProgrammingAtlassian ToolsApache KafkaWeb TechnologiesSpring JdbcDomain Driven DesignDockerMicroservices
Java and Spring Ecosystem
Expert knowledge of Java and Spring ecosystem with over 18 years of development experience.

Software Architecture
Proficient in designing and implementing microservices, domain-driven design, and various software architectures.

DevOps and Cloud Technologies
Experienced with Docker, OpenShift, and various cloud technologies for deployment and infrastructure management.

Database Technologies
Skilled in working with various databases including PostgreSQL, Oracle DB, IBM DB2 and Redis.

Web Technologies
Experienced in HTML, CSS, JavaScript, and web frameworks such as Spring MVC and JSP/JSF/Thymeleaf.

Version Control and CI/CD
Experienced with Git, GitLab, and continuous integration/deployment practices.

Project Management Tools
Familiar with Atlassian suite including JIRA and Bamboo for project management and issue tracking.
 

Languages

GermanBasic knowledgeEnglishFluentCroatianNative speaker

Project history

Lead Software Engineer – Croatian Customs Administration – HRAIS2 project

Lomax Soft d.o.o.

Internet & IT

< 10 team member

Implementation of new Croatian Automated Import System (CCI – centralised customs) project for Croatian Customs. Technical leadership, proof-of-concept solutions, integration with external system, Implementation of integration modules for CCN2 (EU inter-member-state message exchange) and bookkeeping system (NIK), code review, mentoring, supported developers. Implemented also integration with Tariff system, implementation of national rules validation modules, implementation of various business process use-cases. Support DevOps and testers.

Lead Software Engineer – Croatian Customs Administration – CCN2 Mediator project

Lomax Soft d.o.o.

Internet & IT

< 10 team member

Built a custom SOAP API Gateway with security transformation & termination features for government customs administration.  I was sole designer & developer of a PoC and, after evaluation, the full-featured solution. Refactored the solution to support OpenShift deploment, application deployment containerization and configuration simplification.

Member of the management board

HUJAK – Croatian Java User Association

Internet & IT

< 10 team member

Served on the management board of the Croatian Java User Association.

Java Software Engineer – Transition Facility project

Lomax Soft d.o.o.

Government and Public Services

< 10 team member

Development and maintenance of TF application modules (EUP – digital office, Potvrde – electronic tax administration certificates).

Backend Software Engineer – HT – BITT/STORM – Order Management Project

Lomax Soft d.o.o.

Telecommunications

< 10 team member

Implementation of Order Execution multi-service module of the new telco core system (BSS) for one of the largest telcos in region (Hrvatski Telecomm, part of DT). Working on microservice system design, developing PoCs for tech stack and specialized framework libraries, implementing process flows for specific business needs.

Senior Java Developer – SUKAP – liquefied gas management project

Lomax Soft d.o.o.

Energy, Water & Environment

< 10 team member

Working on new features and modules on a system for liquefied gas transportation, trading & monitoring system. Implementing integrations between international gas trading vendors.

Director of Engineering

Instantor AB

Banking & Financial Services

10-50 team member

Consolidating infrastructure, architecture & tech stack of a fast growing international fintech startup. Working on improving reliability of internal systems while trying to keep both developers and stakeholders happy. Reducing technical debt and chaos. Participated in development of complex large-data algorithms for specific clients.

Consultant developer – Order Management Control Center

IBM d.o.o., Zagreb, Croatia

Telecommunications

50-250 team member

Architecture and implementation of backoffice administrative web application for order management for Telenor Serbia. Management, tracing and visualizing of Customer, Product, Service and Resorce Orders, Build Plans and Jobs with integrated logs monitoring and executive dashboard. Integration with business backend BPM.

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