Java Developer

• Design, develop, and maintain scalable Java applications for energy trading solutions.
• Work primarily with Spring Boot, Project Reactor, and Apache Kafka to build robust, event-driven systems.
• Collaborate closely with cross-functional teams to define, design, and ship new features.
• Write clean, efficient, and testable code, following industry best practices.
• Participate in code reviews and contribute to continuous improvement of our development processes.
• Stay up to date with emerging trends and technologies, share knowledge within the team

• Proven experience as a Java developer in a professional environment.
• Strong expertise in Spring Boot and knowledge of developing RESTful APIs.
• Experience with Time Series data, especially with time zone handling and DST.
• Hands-on experience with messaging systems, especially Apache Kafka.
• Familiarity with reactive programming (ideally with Project Reactor).
• Experience in building and maintaining production-grade, distributed systems.
• Excellent problem-solving skills, with a proactive and self-driven approach.
• Effective communicator in English; German is a plus.
• Willingness and ability to join onsite meetings in Essen, Germany 1/2 days per month., * How many years of experience do you have as Java Developer?
• How many years of experience do you have in Project Reactor?
• How many years of experience do you have in Apache Kafka?
• How many years of experience do you have in RESTful APIs?
• How many years of experience do you have in Time Series data, especially with time zone handling and DST?

Language:

• German (Required)

OneAPPS GmbH is a Technology consulting firm based out of Germany and offices across Europe. We are working on various projects involving diverse, multicultural teams with clients across the Germany & Europe. We are an invaluable partner and our teams have collaborated to support the growth of our clients. With more than 7 locations worldwide we help our clients to deliver their projects smoothly. We look forward to getting to know you and working with you.