- web based system (optimizing catering, invoices) for multiple, big airline companies (Java, J2EE, Weblogic, JMS, MQ Series, RMI, JAXB, Castor),
- sales information system for telecommunication company in Poland (technologies: Java, JMS, JDBC, Oracle),
- alarm monitoring system for biggest telecommunication company in Poland (technologies: Java, J2EE, JDO, JMS, EJB),
- inventory system for telecommunication company (J2EE - JDO, EJB, JDO (Kodo)),