Senior Backend Engineer (Java) — IoT Remote Monitoring & Energy Management SystemLocation: Germany · MunichEmployment Type: Full-timeAbout the TeamWe are building an IoT remote monitoring and Energy Management System (EMS) for the European market, covering data ingestion, monitoring & alerting, and energy scheduling/optimization for PV and storage assets. Our stack is modern, our market is Europe (GDPR, Data Act compliance), and we are exploring AI-powered assistants as a new direction. You will take deep ownership of core system design and evolution, with a clear growth path toward System Engineering (solution design) or full-stack development.ResponsibilitiesDesign and develop backend services for IoT remote monitoring and EMS: device data ingestion, time-series processing, alerting, reporting, and control-command flows.Build, test, and ship modules on our stack: Java 21 / Spring Boot / MyBatis-Plus / MySQL / Redis / Kafka / ClickHouse / Quartz / S3-MinIO.Own system-solution work: analyze requirements, produce database designs, API designs, and third-party integration proposals; lead or join technical design reviews.Integrate with third-party systems and data exchanges (REST / SFTP / object storage) with security and reliability.Support production operations: monitoring & alerting, performance optimization, troubleshooting and root-cause analysis.Collaborate with product, frontend, and compliance teams to embed GDPR / Data Act requirements into system design.Explore and deliver AI-powered features (e.g., AI Q&A assistant).Requirements (Must-have)Bachelor's degree or above in Computer Science or related field; 6+ years of Java backend development experience.Strong command of Java / Spring Boot; solid experience designing and delivering microservice architectures.Proficient with MyBatis-Plus and MySQL/MariaDB; strong SQL tuning and schema design skills.Proficient with Redis (cache architecture, distributed locks, cache-consistency strategies).Familia