ECMWF: Senior HPC Application Analyst

ECMWF, Shinfield Park, UK
Closing date: 8 October 2020

ECMWF’s High-Performance Computing Facility (HPCF) is a mission-critical central service provided by two Cray XC40 clusters installed in Reading. ECMWF has signed a four-year contract worth over 80 million euros with Atos for the supply of the successor system. The new system is being installed in ECMWF’s new Bologna Data Centre and will deliver an increase in sustained performance of about a factor of five compared to ECMWF’s current system.

The position is in the High-Performance Computing and Storage Section of ECMWF’s Computing Department. The successful candidate will lead a small team and will support research scientists and code developers in achieving the most efficient use of ECMWF’s petascale high-performance computing systems. This will involve providing advice and assistance in writing, maintaining, debugging, profiling and optimising large and demanding scientific codes. The successful candidate will also contribute to the long-term strategic direction of the Centre by bidding for and working with externally funded projects and programs and participating in the ECMWF Scalability Programme. The Scalability Programme aims at developing the next generation forecasting system, investigating the performance of ECMWF’s main codes on different computer architectures, and benchmarking future systems.

Main duties and key responsibilities

  • Assisting developers with the profiling, optimisation, restructuring and debugging of large scientific codes used by ECMWF
  • Liaising closely with users and vendors to identify and resolve current performance and functional issues with ECMWF’s main codes
  • Investigating and improving the performance and efficiency of ECMWF’s main codes on different computer architectures and with different software paradigms
  • Full life cycle support and ownership of ECMWF’s HPC benchmark suite built around its own Integrated Forecasting System code base, including acting as focal point to support vendor benchmarking efforts
  • Testing and evaluating new versions of software, compilers, run-time libraries, profiling and debugging software; making recommendations for their use and developing business cases to support purchase
  • Technical direction and leadership of a small team and prioritisation of different work streams to satisfy the needs of ECMWF
  • Exploring and cultivating opportunities for collaboration with external organisations and projects
  • Working with the ECMWF Communications Section to organise the ECMWF biennial workshop on the use of high-performance computing in meteorology

Other information
The successful candidate will be recruited at the A3 grade, according to the scales of the Co-ordinated Organisations and the annual basic salary will be £74,764.08 net of tax. This position is assigned to the employment category STF-C as defined in the Staff Regulations.
Full details of salary scales and allowances are available on the ECMWF website at, including the Centre’s Staff Regulations regarding the terms and conditions of employment.

Starting date: As soon as possible
Length of contract: Four years, with the possibility of a further contract.


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