Java

Pavol Rajzák

Professional Java Developer

About me

Professional software developer with focus on Java web applications and web in general. Several years of experience combined with open-mindedness towards new technologies. Feels at home both in backend and frontend development.

Hobbies and interests

Music
Nature
Travelling
Cinema
Sports
Computers

Work experience

Senior software developer

Smartman June 2022 - Present Bratislava, Slovakia

Merchant Boarding applications for POS/Ecommerce terminals service provider (12/2022 - now)

Java 17 Maven Spring Boot GraphQL JPA/Hibernate Camunda BPMN Oracle DB React Git JUnit 5

SaFi - mobile-first banking application for Phillipines (06/2022 - 11/2022)

Kotlin Gradle Micronaut Apache Kafka Google Cloud Platform Docker Kubernetes Git Github ThoughtMachine JUnit 5 Testcontainers

Software architect

Itera October 2020 – May 2022 Bratislava, Slovakia

Tech lead

Itera October 2017 – September 2020 Bratislava, Slovakia

Senior Developer

Itera October 2015 – September 2017 Bratislava, Slovakia

System for control and monitoring of traffic systems in tunnels, roads and bridges (10/2018 - 05/2022)

Java 8/11 JavaFX RXJava JDBI JAX-RS/Jersey JavaScript React Redux Jest Bootstrap Maven Easymock Git Docker Apache Kafka Kafka Streams

Secure E-ID solution for signing and authentication (07/2017 - 05/2018)

JavaJUnit BouncyCastle JCE Hamcrest JaCoCo Maven Mockito PowerMock SonarQube Git Confluence JIRA Jenkins UpSource

Insurance portal applications (01/2017 - 06/2017)

Java JavaScript Angular Grunt JSHint ES5 Karma DB2 Jetty REST Maven Spring Apache Tomcat Git TeamCity

Financial advisory application for clients of banks (08/2016 - 12/2016)

Java JavaScript React Flux Flowtype ES6 Webpack Mocha Oracle Postgre REST Maven Spring Apache Tomcat Git Jenkins

Client applications for Central Securities Depository (10/2015 - 06/2016)

Java JavaScript React ES6 Webpack Karma Mocha DB2 REST Maven Hibernate Spring ESB Apache Tomcat OpenShift Git SonarQube Jenkins

Professional Java Engineer

ERNI (Slovakia) s.r.o. October 2013 – August 2015 Bratislava, Slovakia

Junior Java Engineer

ERNI (Slovakia) s.r.o. September 2012 – September 2013 Bratislava, Slovakia

Web application for sensor-based measurement devices (05/2015 - 08/2015)

Angular.js CoffeeScript Gulp.js Karma.js Jasmine SVG Canvas D3.js

Web Applications for Reinsurance Company (08/2013 - 05/2015)

Java Spring framework Spring Boot Spring-WS Apache Tomcat Oracle 11g PrimeFaces JSF JPA Hibernate SVN Maven

Set of applications for photovoltaic inverters manufacturer (09/2012 - 11/2014)

Java EE Seam 2 MySQL JBoss AS (5,7) PHP Java FX Debian Linux Git Maven jQuery

Programmer

E-zone s.r.o. February 2009 – August 2012 Kosice, Slovakia

Online Reservations and Booking Web Application

PHP MySQL XHTML CSS JavaScript JQuery

Technical support

Centre of Applied Computer Science UPJS Kosice November 2009 – February 2012 Kosice, Slovakia

Computer hardware and software malfunction diagnosis, problem solving, technical support for users

Freelance Java Developer

2010 – 2012 Kosice, Slovakia

Regional Statistics Web Portal

Java Web Application JSP Servlets Hibernate XHTML CSS JQuery MySQL

Online Banking Reputation Manager

Java Hibernate MySQL

Technical support

Sageteam s.r.o. November 2008 – January 2011 Kosice, Slovakia

Communicating with clients, solving software and hardware difficulties, installing updates, etc.

Certifications

Oracle Certified Professional Java SE 6 Programmer
Oracle, 05/2013
Functional Programming Principles in Scala
Coursera, 11/2013
Certified Professional for Software Architecture – Foundation Level
iSAQB, 09/2014
Oracle Certified Expert Java EE 6 Java Persistence API Developer
Oracle, 01/2015
Oracle Cloud Infrastructure Foundations 2020 Certified Associate
Oracle, 05/2020
Confluent Certified Developer for Apache Kafka
Confluent, 02/2021 - 02/2023

Skills

Programming (main)

Java
HTML, CSS
SQL
JavaScript
Kotlin

Languages

Slovak
English
German

Workshops and presentations

Presentations

Going offline - Service worker API (Itera / 2017)
FaaS - Serverless (Public / 2017)
Everyday Git - best practices (Itera / 2018)

Workshops

Spring Boot - workshop (Public / 2016)
Intellij IDEA - showcase (Itera / 2016)
Itera Dev Academy (Public / 2018 - 2019)
Kafka introduction in 5 weeks (series of workshops, Itera / 2022)

Education

Mgr.

Pavol Jozef Safárik Univerzity in Kosice

Master Computer science 2010 – 2012

University of Utrecht

Exchange programme 2011

Bc.

Pavol Jozef Safárik Univerzity in Kosice

Bachelor Computer science 2007 – 2010