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Advertising division: IEK-8 - Troposphere
Reference number: 2019-074

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The Institute for Energy and Climate Research, Troposphere (IEK-8), investigates the chemical and physical processes in the troposphere that impact the chemical composition of the atmosphere. The global modelling group develops and uses the advanced Modular Earth Submodel System (MESSy) to explore the complex chemical transformations that affect air pollution and climate.

We are looking to recruit a

Software Developer, Earth System Modeling for Exascale Computing

Your Job:

Earth System Model (ESM) simulations with complex chemistry and at very high spatial resolutions pose high technical hurdles (“Frontiers”) which need to be overcome in the exascale computing race and in order to solve the grand challenges that society faces. You will enable “frontier” simulations of atmospheric composition with the cutting-edge supercomputers being built at FZJ.

Your tasks in detail:

  • Porting Fortran code for use on GPUs
  • Code vectorization of chemical ODE solvers (Ordinary Differential Equations)
  • Implementation and use of existing parallel and asynchronous I/O strategies
  • Performance Analysis and Load Balancing of Earth System Model Simulations
  • Data management according to FAIR principles


Your Profile:

  • a completed university degree (Bachelor) in computer science or a comparable qualification
  • experience in Earth System Modelling
  • Well-founded knowledge in code development and maintenance
  • Knowledge of High Performance Computing (HPC)
  • Knowledge of Fortran, Python, CUDA, OpenMP, etc.
  • High level of initiative, responsibility and team spirit
  • Good knowledge of English


Our Offer:

  • the chance of collaborating with a team of motivated scientists, technicians and international partners
  • the chance of creating new technological solutions
  • the support for professional development via participation to national and international conferences and advanced trainings
  • Exciting working environment on an attractive research campus with excellent infrastructure, located between the cities of Cologne, Düsseldorf, and Aachen
  • Flexible working hours and various opportunities to reconcile work and private life
  • Limited for 2 years with possible longer-term prospects
  • Full-time position with the option of slightly reduced working hours
  • Salary and social benefits in conformity with the provisions of the Collective Agreement for the Civil Service (TVöD)


Forschungszentrum Jülich wants to increase female staff in this field. We are therefore particularly interested in the application of women.

We also welcome applications from disabled persons.

Additional Information

We look forward to receiving your application, preferably online via our online recruitment system on our career site, quoting the above-mentioned reference number.

Questions about the vacancy?
Contact us by mentioning the reference number 2019-074: career@fz-juelich.de
Please note that for technical reasons we cannot accept applications via email.