Position: Java Developer/Engineer for Integration and Development of Server Solutions /Freelance (one-time projects)
Company: QuadroTech Limited
Experience required: 3y

We are looking for a highly skilled Java Developer/Engineer to join our team and work on integration and development of server solutions. As a Java Developer/Engineer, you will be responsible for designing, developing, and maintaining server-side applications using Java 11 and various Spring Framework technologies. You will also work with messaging gateways, implement MQTT v5 using Spring Integration, and use event-driven network application framework Netty.

Responsibilities:
Design and develop server-side applications using Java 11 and Spring Framework technologies
Integrate server solutions using messaging gateways
Implement MQTT v5 using Spring Integration
Use event-driven network application framework Netty
Develop and maintain Hibernate (via Spring Data JPA) based database access solutions
Write and execute JUnit 5 test cases for developed code
Understand the working of OAuth2, JWT, and their interaction with the framework
Write HTML/CSS/Javascript code for the admin interface
Adapt and develop dashboards using Grafana (bonus skill)

Requirements:
In-depth knowledge of Java 11 and Spring Boot 2.x
Hands-on experience with Spring Security, Spring Integration (messaging gateways), Spring Actuator (micrometer)
Proficiency in Hibernate (via Spring Data JPA), SQL (MySQL), and HQL
Knowledge of MQ (message queues) and event-driven network application framework Netty
Understanding of OAuth2, JWT, and their interaction with the framework
Experience in writing HTML/CSS/Javascript code for admin interface
Ability to write and execute JUnit 5 test cases
Bonus skill: Knowledge of Grafana for dashboard development and adaptation

Company offer:
- Competitive rewards
- Work on interesting projects using advanced technologies
- Friendly environment, flexible schedule;
- Fully remote
- High-quality professional growth.

Location:
- remote (Ukraine)

About the company:
Quadrotech Limited is engaged in the development of business projects in the field of new product development.

Company website:
http://quadrobit.com/


We look forward to your call to discuss your salary expectations!