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Research Software Engineer for I/O Server and Post-Processing Pipelines


  • Organization: ECMWF - European Centre for Medium-Range Weather Forecasts
  • Location: Bonn
  • Grade: A2 - Grade band
  • Occupational Groups:
    • Engineering
    • Information Technology and Computer Science
    • Scientist and Researcher
  • Closing Date: 2022-09-04

Job reference: VN22-51

Location: Bonn, Germany

Deadline for applications: 04/09/2022

Publication date: 13/07/2022

Salary and Grade: Grade A2: EUR 78,035.40, net annual basic salary + other benefits

Contract type: STF-PS

Department: Forecast

Contract Duration: Approximately two years, with the possibility of extensions

ECMWF has exciting opportunities for Computational Scientists to help shape DestinE developments in collaboration with partners throughout Europe. These roles contribute to the provision of much improved prediction capabilities for environmental extremes and for deriving climate change adaptation measures, by developing supporting software components for ultra-high definition Earth system workflows applicable on advanced Exascale HPC architectures: 

The role associated with this vacancy offers a unique opportunity to develop new functionality in a very large-scale asynchronous I/O server for multi-physics coupled models, including support and integration with multiple weather and climate models. This will include network and I/O resource optimisation, requiring proficiency with MPI and multi-threaded environments. 

You will contribute to the design, development and maintenance of the software infrastructure, complex workflows and data management required to support the production of the Digital Twins, will monitor and develop solutions to improve their scalability and computational performance, and will ensure their flexible deployment through federated workflows on distributed extreme-scale high-performance computing (e.g. EuroHPC) and data handling infrastructures. 

You will join existing teams in ECMWF’s Development Section in the Forecast Department that currently develop the software components which handle ECMWF time-critical operational workflows and the dissemination of forecast data to users.  You will strongly collaborate with other teams across ECMWF to demonstrate a successful weather-induced extremes digital twin implementation in the first phase of DestinE.  

You will also support the relationships with ECMWF’s DestinE partners ESA and EUMETSAT, interact with external contractors as required, and help with communications & outreach activities with dedicated partners of the consortia contributing to the DestinE implementation, stakeholders, and the user communities, and contribute to regular progress reports to the European Commission. 

Whilst this position will be based in Bonn, Germany, there will be strong collaboration with staff based at the ECMWF HQ in Reading, United Kingdom, so it is anticipated that visits to the HQ in Reading maybe required. 

ECMWF is the European Centre for Medium-Range Weather Forecasts. It is an intergovernmental organisation created in 1975 by a group of European nations and is today supported by 35 Member and Co-operating States, mostly in Europe. The Centre’s mission is to serve and support its Member and Co-operating States and the wider community by developing and providing world-leading global numerical weather prediction. ECMWF functions as a 24/7 research and operational centre with a focus on medium and long-range predictions and holds one of the largest meteorological archives in the world. The success of its activities relies primarily on the talent of its scientists, strong partnerships with its Member and Co-operating States and the international community, some of the most powerful supercomputers in the world, and the use of innovative technologies such as machine learning across its operations.

Over the years, ECMWF has also developed a strong partnership with the European Union, and for the past seven years has been an entrusted entity for the implementation and operation of the Climate and the Atmosphere Monitoring Services of the EU's Copernicus component of its Space Programme, as well as a contributor to the Copernicus Emergency Management Service. The collaboration does not stop there and includes other areas of work, including High Performance Computing and the development of digital tools that enable ECMWF to extend its provision of data and products covering weather, climate, air quality, fire and flood prediction and monitoring.

ECMWF has recently become a multi-site organisation, with its headquarters based since its creation in Reading, UK, its new data centre in Bologna, Italy, and new offices in Bonn, Germany. For additional details, see

ECMWF is a major partner in the implementation of the Destination Earth (DestinE) initiative, together with ESA and EUMETSAT as partners. The objective of the European Commission DestinE initiative is to deploy several highly accurate thematic digital replicas of the Earth, called Digital Twins.  The Digital Twins will help monitor and predict environmental change and human impact, in order to develop and test scenarios that would support sustainable development and corresponding European policies for the Green Deal.  

DestinE will thus contribute to revolutionising the European capability to monitor and predict our changing planet, complementing existing national and European efforts such as those provided by the national meteorological services and the Copernicus Services. It will be run in several phases, of which the first, the implementation phase, covers the period end-2021 – mid-2024. Future phases are foreseen (subject to funding) that will operationalise the digital twins, scale-up system production and add applications and new twin options. 

DestinE covers several demanding digital technology aspects required to develop, implement and operate the two high-priority digital twins on weather induced and geophysical extremes and on climate change adaptation. ECMWF will be responsible for the delivery of these digital twins, which will rely on complex Earth-system simulation models, data assimilation methods for fusing simulations and observations through inverse modelling and the integration of observations and models from sectors such as water and food management, renewable energies and socio-economic risk and disaster management.  

These science components require advanced digital technology solutions to maximize the efficient computing and data handling on extreme-scale infrastructures, and to adapt and operate these infrastructures across different heterogeneous architectures within a federated framework. This federated framework includes the Core Platform and Data Lake developed, deployed and operated by ESA and EUMETSAT respectively.  

The DestinE developments take forward the long-term investments of the ECMWF Member States in building a unique European prediction capability and will support the further advancement of member states services and Copernicus Services. 

For more information on DestinE, see and 

  • Development, maintenance and testing of software and complex workflows in advanced digital technology environments on some of the largest computing and data handling infrastructures in Europe
  • Developing and maintaining the I/O server software 
  • Helping to plan the development and evolution of the I/O server software and its associated post-processing  
  • Ensuring the quality of service of the DestinE workflows and its services 
  • Excellent analytical and problem-solving skills with a proactive continuous improvement approach 
  • ​​​​​​​Initiative and ability to work collaboratively with other ECMWF teams but also able to work independently 
  • Good interpersonal and communication skills 
  • Dedication, passion, and enthusiasm to succeed both individually and across teams of developers 
  • Highly organised with the capacity to work on a diverse range of tasks to tight deadlines 
  • ​​​​​​​Advanced university degree (EQ7 level or above) or equivalent professional experience in computer science or engineering, computational science, physics or natural sciences, mathematics, or a related discipline.
  • Professional experience in large-scale code development in scientific computing or a related subject. Experience with deployment and execution in HPC environments or with handling very large data sets would be an advantage.
  • Experience in C/C++ development and software lifecycle maintenance is important. Experience with Python and interfacing to C/C++ is highly desirable.
  • Experience working in an international consortium delivering joint software artifacts would be an advantage.
  • Experience with Object-Oriented Analysis and Design, and programming in UNIX/Linux environments is desirable.
  • Candidates must be able to work effectively in English and interviews will be conducted in English.  Good knowledge of one of the Centre’s other working languages (French or German) would be an advantage. 

Grade remuneration

The successful candidates will be recruited at the A2 grade, according to the scales of the Co-ordinated Organisations and the annual basic salary will be EUR 78,035.40 net of tax. ECMWF also offers a generous benefits package, including a flexible teleworking policy. The position is assigned to the employment category STF-PS as defined in the ECMWF Staff Regulations. Full details of salary scales and allowances available on the ECMWF website at, including the ECMWF Staff Regulations and the terms and conditions of employment.

Starting date: As soon as possible.

Length of contract: The contract duration is expected to be approximately two years until 31 May 2024. The DestinE Contribution Agreement is divided in phases, the first of which will last approximately two years. There is the possibility of further contract extensions in the future depending on requirements and funding availability.

Location: This position will be located at ECMWF's duty station in Bonn, Germany.

As a multi-site organisation, ECMWF has adopted a hybrid organisation model which allows flexibility to staff to mix office working and teleworking.  Successful applicants and members of their family forming part of their households will be exempt from immigration restrictions. 

Interviews by videoconference (MS Teams) are expected to take place in September 2022.

Applicants are invited to complete the online application form by clicking on the apply button below.

At ECMWF, we consider an inclusive environment as key for our success. We are dedicated to ensuring a workplace that embraces diversity and provides equal opportunities for all, without distinction as to race, gender, age, marital status, social status, disability, sexual orientation, religion, personality, ethnicity and culture. We value the benefits derived from a diverse workforce and are committed to having staff that reflect the diversity of the countries that are part of our community, in an environment that nurtures equality and inclusion.

Applications are invited from nationals from ECMWF Member States and Co-operating States, as well as from all EU Member States.

ECMWF Member and Co-operating States are: Austria, Belgium, Bulgaria, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Georgia, Germany, Greece, Hungary, Iceland, Ireland, Israel, Italy, Latvia, Lithuania, Luxembourg, Montenegro, Morocco, the Netherlands, Norway, North Macedonia, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

In these exceptional times, we also welcome applications from Ukrainian nationals for this vacancy.  

Applications from nationals from other countries may be considered in exceptional cases.


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