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Your mission Your mission is to design and maintain a scalable, asynchronous backend that powers OKAPI:Orbits' end-to-end solutions across mission design, Space Situational Awareness (SSA), Space Traffic Management (STM), Flight Dynamics (FD), and Space Traffic Coordination (STC), supporting satellite operators throughout their entire mission lifecycle. You'll work primarily on external customer projects with a Python-based tech stack, while also contributing in parallel to our products built on Java Spring Boot. You design and implement robust microservices that process and distribute large volumes of orbital and telemetry data to deliver reliable APIs and automation processes. You already bring solid experience and take independent ownership of parts of the backend architecture across both environments. You'll work on the systems that enable satellite operators and space agencies to analyze, coordinate, and protect their missions in an increasingly crowded space environment. Studies show that women are less likely to apply for a position if they don't meet 100% of the requirements. Please know that we explicitly encourage you to apply if this applies to you, as long as you bring a passion for space technology, reliable software development, and sustainable use of space. OKAPI:Orbits already brings together a highly diverse team and is actively committed to growing that diversity further, since studies show that heterogeneous teams achieve better results and drive innovation. Your profile Must-haves Degree in Computer Science, Software Engineering, or a related field, or completed vocational training as a Fachinformatiker (IT specialist) At least 2 years of professional experience with Python for backend development, scripting, automation, or data processing At least 2 years of professional experience in backend software development with Java (Spring Boot or comparable) Solid understanding of microservice architectures, asynchronous systems, and distributed communication patterns Practical experience with testing and code quality assurance Experience with, or willingness to quickly get up to speed on, message-based communication between services (e.g., RabbitMQ or comparable message brokers) and containerization (Docker) Ability to independently plan, implement, and review complex features in close collaboration with engineers and scientists Proactive communication, structured way of working, and good written and spoken English Nice-to-haves Experience with orchestration, particularly Kubernetes Experience with code reviews and adherence to coding standards Solid understanding of software architecture principles, including modular structure, scalability, and maintainability Experi

Backend Developer (Java & Python, Microservices)

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