The Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research (AWI) is a member of the Helmholtz Association (HGF) and funded by federal and state government. AWI focuses on polar and marine research in a variety of disciplines such as biology, oceanography, geology, geochemistry and geophysics, thus allowing multidisciplinary approaches to scientific goals.

Scientific programmer (C/C++ or FORTRAN): Scalable models for digital twins of the climate system (m/f/d)


The Climate Dynamics section at the Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research (AWI) in Bremerhaven, Germany, invites applications for a scientific programmer (C/C++ or FORTRAN) for the development of scalable models in support of digital twins of the climate system.

You will work with leading European climate modellers, computing scientists and software engineers on developing digital twins of the climate system in support of adaptation to climate change. The Climate Adaptation Digital Twins system harnesses two kilometre-scale Earth-system models (ESMs) to Europe's most performant computing high-performance computing systems.


  • You will be part of a team responsible for the development and deployment of high resolution models of the atmosphere and ocean.
  • The tasks are related to support the model development (in particular FESOM2 ocean model, by adding new I/O capabilities, code optimisation and portability.
  • Overall, the new model developments should contribute to the exascale-readiness of the models and boost scalability and portability.
  • The models will be deployed on the latest European HPC systems (e.g., LUMI - the first pre-exascale supercomputer of the EuroHPC Joint Undertaking).


  • A master or PhD in one or more of the following fields is required: computer science, mathematics, data sciences, physics, meteorology, oceanography, climate sciences, or related field.
  • Demonstrated skill/proficiency in C/C++ or/and FORTRAN and fluency in English are further requirements.
  • We follow good software development practices and, therefore, expect candidates to have hands on experience with version control (git), writing tests, and creating documentation.

Moreover, having several of the following skills would be distinct advantage:

  • Experience with HPC systems, *nix and bash scripting,
  • Experience with MPI and/or OpenMP,
  • Parallel programming of heterogeneous CPU/GPU systems (e.g. OpenACC), and
  • Experience with complex climate models and geophysical data formats (netCDF, GRIB, zarr)

Further Information

Please contact Prof. Dr. Thomas Jung (; +49 15146722091) or Dr. Nikolay Koldunov (, @oceanographer on Twitter) for further information.

This is a full-time position, limited to 20 month. It is advertised subject to approval of funding and with the possibility of extension (depending on continued funding). It is also suitable for part-time employment. The salary will be paid in accordance with the Collective Agreement for the Public Service of the Federation (Tarifvertrag des öffentlichen Dienstes, TVöD Bund), up to salary level 13. The place of employment will be Bremerhaven.

The AWI is characterised by

  • our scientific success - excellent research
  • collaboration and cooperation - intra-institute, national and international, interdisciplinary
  • opportunities to develop - on the job, aiming at other positions and beyond AWI
  • a culture of reconciling work and family - an audited and well-supported aspect of our operation
  • our outstanding research infrastructure - ships, stations, aircraft, laboratories and more
  • an international environment - everyday contacts with people from all over the world
  • having an influence - fundamental research with social and political relevance
  • flat hierarchies - facilitating freedom and responsibility
  • exciting science topics, with opportunities also in technology, administration and infrastructure

Equal opportunities are an integral part of our personnel policy. The AWI aims to increase the number of female employees and therefore strongly encourages qualified women to apply.

Disabled applicants will be given preference when equal qualifications are present.

The AWI fosters the compatibility of work and family in various ways and has received a number of awards as a result of this engagement.

We look forward to your application!

Please submit your application by August 26th 2022, exclusively online.

Reference number 22/132/D/Kli-b

posted: 15 August 2022     Please mention EARTHWORKS when responding to this advertisement.