Scientific Programmers

The department investigates the dynamics of the ocean carbon cycle, its variability and predictability, and its role in the Earth system through climate-carbon cycle feedbacks operating across timescales from days to millennia. A central objective is to improve the representation of marine carbon, nutrient cycling and microbial processes in Earth System Models while increasing spatial model resolution to capture key physical and biogeochemical dynamics in the ocean. \n

To support this mission, we are seeking different Scientific Programmers (m/f/d) to drive the next generation of ocean biogeochemical modelling in Earth System Models. The successful candidates will contribute to the development, integration, and performance optimization of a state-of-the-art modelling framework, enabling increasingly sophisticated representations of marine biogeochemical processes and unprecedented high-resolution numerical experimentation. Together, they will help ensure that the modelling infrastructure combines scientific excellence with cutting-edge software engineering, delivering robust, efficient, and scalable performance on current and future exascale computing platforms. \n

The successful candidate will be responsible for maintaining and advancing the ocean biogeochemical model code based on the HAMburg Ocean Carbon Cycle model (HAMOCC), which is part of the ICON Earth system modeling framework, ensuring that scientific developments arising from ongoing research are robustly implemented, documented, tested, and integrated into the model's main development branch. \n

• Degree in oceanography, climate science, physics, mathematics, or a related field (PhD is advantageous)\n
• Experience with numerical modelling and analysis of large simulation datasets\n
• Knowledge of ocean biogeochemistry or Earth System Modelling\n
• Strong proficiency in scientific programming in Fortran, Python, Shell scripting (Bash) or comparable languages\n
• Experience with HPC environments and scientific workflows\n
• Experience with software engineering best practices, including Git version control, software testing and debugging, code review workflows, Continuous Integration and Continuous Deployment (CI/CD)\n
• Fluent in English, with solid scientific writing skills and a strong interest in working collaboratively within an international and interdisciplinary team\n, We offer a position in an international science environment. You can expect a multifaceted job with challenging tasks in an exciting, academic work environment. You will have a high degree of autonomy and creative freedom, and we will promote your further education, e.g. within the framework of external courses and certifications. The compatibility of private life, family and career are important components of our personnel policy. You will be paid according to the collective agreement for the public service (TVöD Bund). Allowances are possible depending on qualifications and areas of responsibility. \n\t\t\t\n\t\t\t\n\t\t\t\t\n\t\t\t\t

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• Maintain and develop the ocean biogeochemical model code of the HAMOCC model\n
• Coordinate integration of new process representations developed across multiple projects\n
• Establish and maintain software quality standards, testing procedures, and documentation\n
• Support researchers in implementing and evaluating new model components\n
• Ensure scientific consistency and long-term maintainability of the code base\n

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