Java Software Developer (Senior)

Department Overview At Cobalt Streamworks, we create technologies our customers refer to as their lifeline. Dimetra is providing a mission critical TETRA-based communication system. Dimetra Network Management team is responsible for system configuration and monitoring solutions. Our products are based on various technologies and are entirely developed and tested in our R&D center in Krakow. Job Description We are seeking a skilled Java Software Developer who will join one of our scrum teams responsible for end to end software development lifecycle. Every day you will cooperate with experienced professionals on planning, development, testing and maintenance of the customer features. If you are open minded, willing to learn new things and seeking growth opportunities then join our team. Basic Requirements Proficiency in Java (JDK 21) Solid knowledge of Java Concurrency Knowledge of Python or BASH for scripting, automation, or tool development Strong understanding of networking protocols (e.g., TCP/IP, UDP) and IP programming on Linux Practical experience with Linux operating systems and virtualization Ability to write comprehensive JUnit tests Strong English language communication skills Ability to work from the office 2 days per week Additional Knowledge/Skills Experience with dependency injection in Java (CDI), Spring, or Quarkus Familiarity with the Netty Framework Experience with CI/CD tools and techniques (e.g., Jenkins, GIT, Artifactory, JIRA) Knowledge of WebSockets and garbage collection tuning Experience handling audio streams (e.g., RTP, SRTP, ACELP)