Intermediate Java Developer (all genders)

Your challenge In the role of Java Developer, (all genders) at Hubject , you will design, develop, and maintain software solutions that power Hubject's eRoaming platform and charging services for our international clients, contributing hands-on to the architecture and delivery of scalable, high-performance backend systems, while also ensuring their ongoing operational stability through ongoing monitoring, maintenance, and support. Please note that due to planning reasons, this role is currently limited to a 2-year-contract. Why Hubject We develop ideas and deliver solutions for the eMobility market We are working on the most important growth topics We are an international team of very motivated eMobility enthusiasts AND We have over 30 benefits different categories: Food & drinks (food subsidy on the Euref-Campus restaurants) Mobility (BVG subsidy) Health & sports (Urban sports membership M) Equipment (Laptop etc) Learning and development (yearly training budget and Udemy learning platform access) Hubject Lifestyle (Voiio membership) Family-friendly environment (flex working time) Your Tasks Design, develop, and maintain robust, scalable Java-based applications and microservices for the global automotive and eMobility sector. Write clean, secure, well-tested, and maintainable code following software engineering best practices and design patterns. Take full ownership of features and components, driving their implementation independently from development through delivery. Participate in code reviews, technical design discussions, and architecture decisions to ensure high-quality, scalable solutions. Ensure the reliability, performance, and timely delivery of global systems while continuously improving existing applications through monitoring, optimization, updates, security patches, and troubleshooting production issues. Support operational excellence through proactive monitoring, incident response, and root-cause analysis to maintain platform stability. Contribute to the team's success with an entrepreneurial mindset, flexibility in solving technical challenges, and a strong commitment to delivering exceptional user experiences. Your Profile You have at least 4+ years of professional experience in Java development, with a strong track record of building and maintaining complex, scalable software systems. Solid knowledge of Java, Spring/Spring Boot, RESTful APIs, relational databases, and microservice architectures, along with experience in cloud-native development on AWS (e.g., EC2, S3, Lambda, RDS). Experience with automated testing and modern DevOps practices, including unit, integration, and end-to-end testing (e.g., JUnit, Mockito) as well as CI/CD pipelines. Good understanding of secure coding practices and application security principles, including OWASP, authentication/authorization, and data protection. Strong collaboration and communication skills, with the ability to work effectively in cross-functional, matrix organizations and partner closely with product and business stakeholders. A goal-oriented, structured, and detail-focused mindset, with a strong sense of ownership and a passion for teamwork. Openness to international collaboration, new technologies, and eMobility, with knowledge of protocols such as OCPI, OCPP, or OICP considered a strong plus. Language Company language is English (fluent skills required) Start date as soon as possible Location Onsite in Berlin Hybrid system: 2 days per week at the office, 3 days remote EUREF Campus in Schöneberg in Berlin - Europe's hotspot for green technology and eMobility