Senior Backend Developer (all genders)

About us Are you passionate about building powerful backend systems that drive the future of renewable energy? Join our innovative Assetpilot product development team, and create scalable, high-performance services that power next-generation renewable energy management solutions! Join Romania's thriving tech hub, and work from our modern office in Cluj-Napoca. Collaborate with international colleagues, while building backend systems that power the renewable energy revolution. Your mission: As a Senior Backend Developer you will: Service Architecture : Design and develop scalable microservices for the Assetpilot platform using Kotlin and Spring Boot, API Development : Build robust RESTful APIs that power frontend applications and integrations, Data Pipeline Engineering : Implement high-performance data processing pipelines for real-time asset monitoring, Database Optimization : Design and optimize MongoDB schemas and aggregation pipelines for maximum performance, Integration Development : Create reliable integration services for IoT devices and external systems, Performance Engineering : Ensure backend services meet demanding performance and reliability requirements, Security Implementation : Build secure services with proper authentication, authorization, and data protection, Technical Collaboration : Work closely with frontend developers and the Full Stack team lead to deliver cohesive features. Your Tech Stack: Core : Kotlin, Java, Spring Boot, Spring Security, Spring Data, APIs : REST, OpenAPI/Swagger (GraphQL experience is a plus), Databases : MongoDB, Redis, aggregation pipelines, Messaging : Apache Kafka, event-driven architecture, Cloud & DevOps : Docker, Kubernetes, CI/CD, Monitoring : Prometheus, Thanos, Grafana, Testing : JUnit, Mockito, TestContainers, Gatling, Tools : Git, Gradle, Maven, IntelliJ IDEA, Keycloak. You want to save the world with us? If you're excited about building robust, scalable backend systems that make a real impact on renewable energy management, we want to hear from you! Apply now and join a team that's creating the technological foundation for a sustainable future! Welche Rolle spielst du beim Retten der Welt? Your profile: Education : Bachelor's/Master's in Computer Science, Software Engineering, or related field, Experience : 4+ years in backend development with enterprise applications, Kotlin/Java Expertise : Expert-level proficiency with Spring ecosystem, API Design : Strong experience with RESTful services, API design principles, and documentation. GraphQL knowledge is a plus, Database Skills : Advanced MongoDB knowledge, including performance optimization, Microservices : Experience with distributed systems and microservices patterns, Cloud Knowledge : Hands-on experience with Kubernetes cluster management and orchestration in cloud-native environments, Message Queuing : Experience with Kafka or similar event streaming platforms, Testing Mindset : Strong focus on quality, with comprehensive testing practices, DevOps Skills : Experience with containerization and CI/CD pipelines, Communication : Professional proficiency in English skills is a must-have (German is a plus but not required). Das hast du im Gepäck You can look forward to: Technical Excellence : Focus on backend development with cutting-edge technologies, Hybrid Working Model : Flexibility between office and remote work, International Environment : Collaborate with teams across twelve locations worldwide, Modern Tech Stack : Work with Kotlin, Spring Boot, MongoDB, Kafka, and cloud platforms, Professional Development : Continuous learning opportunities in backend technologies and cloud architecture, Meaningful Impact : Build the backbone of systems that power renewable energy asset management, Performance at Scale : Work on systems handling real-time data from thousands of renewable energy assets. What we offer you A wide range of benefits to make your employee experience worthwhile: Meal vouchers, cultural vouchers, vacation vouchers, and much more, A comprehensive medical insurance: To ensure the wellbeing of all our employees. Your Contact Person Lorenzo Frattali Business Partner People & Culture [email protected]