Senior Java Developer  - (TMS - Terminal Management System)

Senior Java Developer (TMS) 

•         Design and implementation of IT solutions based on the presented analytical and technical documentation;

•         Reviewing analytical documentation;

•         Creating technical documentation;

•         Technical upgrade for existing system;

•         Working with legacy code

•         Conducting regular scans in the application and removing vulnerabilities

 Job Requirements

• Fully available in the Polish time zone;

• Ability to work from the office in Warsaw (weekly: 4 days at office + 1 day remotely);

• Very good knowledge of Java 8+ and object-oriented programming issues;

• Experience in independent design, implementation, documentation and testing of application components;

• Very good and practical knowledge of Spring, Spring Boot, SQL, Scrum, Hibernate/JPA and JEE frameworks;

• Practical knowledge with message queue systems, particularly RabbitMQ;

• Practical knowledge of tools supporting the software development process: Maven, Git, Gitlab, Gitlab CI/CD, Jenkins, Nexus, Jira;

• Knowledge of relational databases, in particular Oracle;

• Practical knowledge of RESTful API design;

• Experience in system integration;

• Experience with distributed systems;

• Experience with application servers, JBoss/WildFly;

·  Knowledge of scanning tools (Fortify, Sonatype..)

• Knowledge of English / B2;

 Nice to have:

·         Angular

·         Linux server

·         Docker

Description of the area of involvement

 TMS (Terminal Management System) is used to manage a very large number of payment terminals (300k+), it gives users a uniform way to manage different terminals from different hardware vendors.

TMS has a complex architecture, consisting of two components TMS (1 WildFly instance) providing GUI and implementing some business functions and RTMS (3 Spring-boot instances) implementing most of the business functionalities. A gradual migration from TMS to RTMS is being carried out.

The system intensively uses Spring, Hibernate and RabbitMQ.

The system has distributed transactions (different two-phase-commit, saga approaches) and distributed cache (Hazelcast).

 TMS is integrated with many internal and external systems (via REST, SOAP, RMI, direct database connections and database links).

The GUI is written in GWT and GWTExt.

 1 year project with possibility for hiring after this time.