Vuk Djapic
Verified Expert in Engineering
Full-stack Java Developer
Belgrade, Serbia
Toptal member since August 16, 2016
Vuk has 15 years of experience as a developer, consultant, and system architect. Proficient in Java and JavaScript, he has worked on desktop and web applications, microservices, SQL and NoSQL data management solutions, AWS services and deployments, and many more related tools. Vuk always tries to align code, development procedures, and architecture with technology standards and best practices.
Portfolio
Experience
- Java - 10 years
- JavaScript - 9 years
- Spring - 9 years
- Software Architecture - 7 years
- JPA - 7 years
- Elasticsearch - 5 years
- Domain-driven Design (DDD) - 4 years
- Angular - 3 years
Availability
Preferred Environment
Java, Spring Boot, Elasticsearch, Apache Lucene, Databases, Microservices, JavaScript, Amazon Elastic Container Service (ECS), Docker
The most amazing...
...project I created was a microservice solution for legacy apps that a big maritime software company, after initial doubts, accepts and becomes very pleased with.
Work Experience
Architecture Owner
Arcadis Gen
- Influenced overall architectural style of the apps developed, from heavy platform-based mini-applications to DDD style microservices.
- Guided less experienced developers towards better design and code practices.
- Participated in planning, feature and task definitions, and development for a very big infrastructure project.
Senior Full-stack Developer | System Architect
Videotel
- Redesigned monolith server and other legacy apps to micro-service architecture, based on Spring Boot, REST APIs, Consul service discovery, and RabbitMQ messaging.
- Participated in planning new features and their place and implementation in micro-service architecture.
- Actively developed many of the features, including headless Chrome browser HTML to PDF reports generator.
Software Development Consultant
Oraise
- Developed from the ground-up components on a clustered platform for collecting, processing, and producing various types of financial data.
- Integrated various APIs with sources of financial data like Thompson, Reuters, and Bloomberg.
- Built components by using Java, Spring Container, JGroups cluster management, PostgreSQL, MongoDB, and a Quartz scheduler.
- Developed the front-end administration panel; used JavaScript with Angular and jQuery.
- Managed the entire component development from the design of classes and choice of technologies to the integration testing with real data.
Senior Lead Developer
Seavus
- Led small teams of two-to-four developers with big automotive insurance and car parts Zurich client.
- Coordinated communication with the client and their business analysts, project managers and QA.
- Managed the analysis of requirements, solution proposals, time, estimations, the division of work, implementation, and code review.
- Worked with large Swiss and US software companies and their leading developers.
- Developed the server-side and JavaScript client-side of web applications; using Java and Tomcat.
Senior Java Developer
Finsoft (formerly GTech)
- Developed middleware and mission-critical components in large software system for online gaming and sports betting.
- Working for SportingBet, a leading British online betting provider.
- Created Lucene-based components as a middle layer between heavily-loaded database and regional websites.
- Supported the integration of subsystems with Oracle Enterprise Service Bus.
- Used Oracle Coherence as a distributed cache and processing layer.
Software Developer
Geneko
- Created a web administration panel for a 3G VPN router device with all the business logic on the client side in JavaScript.
- Developed a web application to track vehicles with GPS and a GPRS device installed, using Java, JSP, and JavaScript.
- Created desktop Java applications for testing different devices and communicating with them through serial connection.
- Used Google and Microsoft Maps, and other regional maps for display of vehicles online. Created a similar functionality as in Google and Microsoft Maps, in JavaScript Canvas on top of real maps.
Experience
Serbian Word Usage Dictionary
Flipico Game
File Searcher
Education
Master's Degree in Information Systems and Technologies
University of Belgrade, Faculty of Organizational Sciences - Belgrade, Serbia
Diploma in Mathematics, Algorithms
Mathematical Grammar School - Belgrade, Serbia
Skills
Libraries/APIs
Java Servlets, Apache Lucene, jQuery, SWT, JAX-RS, Node.js, Backbone.js, React, JMX, Java Message Service (JMS), MyBatis, SAX, JAXB, JAX-WS, Eclipse SWT, JGroups
Tools
Eclipse IDE, Apache Tomcat, Apache Maven, Java Concurrency, FreeMarker, Apache Ignite, Jira, Oracle Coherence, Jenkins, Webpack, Docker Compose, Gulp, Amazon Elastic Container Service (ECS), Apache Solr, Git, Subversion (SVN), Cobertura, Sonar, IntelliJ IDEA, Jetty, Mercurial, Keycloak, RabbitMQ
Languages
Java, SQL, JavaScript, Elm, Java 8, CSS, HTML5, ECMAScript (ES6), XQuery, Web Services Description Language (WSDL)
Frameworks
Spring, JPA, Spring Boot, JUnit, Express.js, Spring MVC, Bootstrap, Angular, Jasmine, Jakarta Server Pages (JSP), JMockit, Swing, Apache Velocity, Mockito, Jersey, Apache CXF, Hibernate
Paradigms
REST, Model View Controller (MVC), Refactoring, Design Patterns, Service-oriented Architecture (SOA), BEM, Agile Software Development, Microservices
Platforms
Ubuntu, Eclipse, JBoss, Docker, NetBeans, Windows, CentOS
Storage
JSON, MongoDB, PostgreSQL, Elasticsearch, NoSQL, MySQL, Databases
Other
Software Architecture, Algorithms, Web Services, Chrome Extensions, HTTP, Data Structures, Regular Expressions, Domain-driven Design (DDD), Technical Leadership, Architecture, SOAP, Scalability, Firefox Extensions, Unix Shell Scripting, Ehcache, Enterprise Integration Patterns (EIP), EJB 3, Enterprise Java Beans (EJB), Consul
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