A Java developer designs, implements, and maintains Java applications that are often high-volume and low-latency, required for mission-critical systems. They contribute in all phases of the development lifecycle, from concept and design to testing. They write well-designed, efficient, and testable code while ensuring designs comply with specifications. They prepare and produce releases of software components, support continuous improvement by investigating alternatives and technologies, and present these for architectural review. They also troubleshoot and resolve coding issues, update job knowledge by participating in educational opportunities, and collaborate with other developers, designers, and system administrators to identify new features.