Your role
ECMWF is hiring a Research Software Engineer (A2) to join the Data Infrastructure Services Team. This team builds and maintains high-performance data services that underpin ECMWF’s real-time weather forecasting and climate data operations. This role focuses on developing and scaling systems that provide efficient access to petabyte-scale datasets used by scientists, policymakers, and operational services worldwide.
Your core responsibility is the development and maintenance of software and service components that power the Copernicus Climate Data Store (CDS). The CDS provides scalable access to ERA5 (12PiB), ERA6 (~25PiB) and many other climate datasets. It serves over 100 TiB of data, responds to around half a million user requests, and supports over 5,000 active users every day.
You will contribute to advancing our data infrastructure by developing reusable components that support fast, scalable, and consistent data access. This work will align technologies across ECMWF’s datastores, including those for our core mandate, external services, and Destination Earth. The focus is on harmonising data handling solutions and access interfaces to ensure performance and consistency across all of ECMWF's datastore platforms.
Your role includes coordinating software contributions from external contractors. This means you will contribute to technical requirements, review software, and ensure alignment with ECMWF standards as well as enforcing code quality, validating scalability, and ensuring seamless integration into operational pipelines.
In this role you will play a central part in enabling next-generation access to weather and climate data. The systems you will work on are designed to meet the demands of modern scientific analysis, delivering high-performance, intuitive access to massive datasets. You will help redefine how weather and climate information is accessed and used, contributing directly to efforts addressing global environmental challenges.
About ECMWF
The European Centre for Medium-Range Weather Forecasts (ECMWF) is a world leader in Numerical Weather Predictions providing high-quality data for weather forecasts and environmental monitoring. As an intergovernmental organisation we collaborate internationally to serve our members and the wider community with global weather predictions, data and training activities that are critical to contribute to safe and thriving societies.
The success of our activities depends on the funding and partnerships of our 35 Member and Co-operating States who provide the support and direction of our work. Our talented staff together with the international scientific community, and our powerful supercomputing capabilities, are the core of a 24/7 research and operational centre with a focus on medium and long-range predictions. We also hold one of the largest meteorological data archives in the world.
Our mission: Deliver global numerical weather predictions focusing on the medium-range and monitoring of the Earth system to and with our Member States
Our vision: World-leading monitoring and predictions of the Earth System enabled by cutting-edge physical, computational and data science, resulting from a close collaboration between ECMWF and the members of the European Meteorological Infrastructure, will contribute to a safe and thriving society
In addition, ECMWF has established a strong partnership with the European Union and has been entrusted with the implementation and operation of the Destination Earth initiative and the Climate Change and Atmosphere Monitoring Services of the Copernicus Programme, as well as being a contributor to the Copernicus Emergency Management Service. Other areas of work include High Performance Computing and the development of digital tools that enable ECMWF to extend provision of data and products covering weather, climate, air quality, fire and flood prediction and monitoring.
ECMWF is a multi-site organisation, with its headquarters in Reading, UK, a data centre in Bologna, Italy, and a large presence in Bonn, Germany as a central location for our EU-related activities. ECMWF is internationally recognised as the voice of expertise in numerical weather predictions for forecasts and climate science.
See www.ecmwf.int for more info about what we do.
About the Copernicus Programme
Copernicus is the earth observation component of the European Union (EU) space programme. Based on the exploitation of spaced based and in situ (earth-based) observations and scientific models, Copernicus provides information services for land, marine, atmospheric and climate monitoring, as well as emergency management and security. These services, and their free, open and quality assured data and tools, support a range of environmental and security applications across sectors and policy domains. For details, see www.copernicus.eu. The Copernicus Climate Change Service (C3S) service provides authoritative information about the past, present and future climate, as well as tools to enable climate change mitigation and adaptation strategies by policy makers and businesses. For details, see https://climate.copernicus.eu
Your responsibilities
Design technical architecture and define requirements for ECMWF datastore software that delivers climate data to a global user base, working closely with production and infrastructure teams.Develop and maintain robust and scalable software and services for distributed, high-volume datastores.Coordinate and review the work of external contributors, ensuring technical alignment, code quality, and operational readiness.Develop integrations between the Climate Data Store and other technologies, including ECMWF and Destination Earth data systems.Collaborate with operational teams to deploy, monitor, and support production services that provide reliable data access.Present ECMWF data systems at international conferences and workshops, showcasing technical advancements and fostering collaboration.What we're looking for
Excellent analytical and problem-solving skills with a proactive and constructive approach.Flexibility, with the ability to adapt to changing priorities and user needs.Excellent interpersonal and communication skills are vital, to communicate with a wide range of technically skilled colleagues, including remote teams, and to non-technical staff.Dedication and enthusiasm to work in a team and across teams.Highly organised with the capacity to work on a diverse range of tasks.Your profile
An advanced university degree (EQ7 level or above) or equivalent experience in computer science or engineering, computational science, physics or natural sciences, mathematics, or a related discipline.Proven experience developing object-oriented software in production environments.Experience with system design, microservice architectures, or networked applications is beneficial.Background in developing scientific software for large-scale data processing is an asset.Familiarity with building or maintaining software in high-availability, operational settings is advantageous.Strong skills in Object-Oriented Analysis and Design.Familiarity with full software lifecycle maintenance, including testing, deployment, and long-term support, is highly desirable.Proficiency in programming within UNIX/Linux environments is desirable.Experience writing software for distributed or scientific computing environments is an advantage.Candidates must be able to work effectively in English.We encourage candidates to apply even if they do not meet every listed requirement. ECMWF supports skill development and provides a collaborative environment where team members can grow into their roles.
Other information
Full details of salary scales and allowances are available on the ECMWF website at www.ecmwf.int/en/about/jobs, including the Centre’s Staff Regulations regarding the terms and conditions of employment. Successful applicants and members of their family forming part of their households will be exempt from immigration restrictions.
Starting date: As soon as possible. Interviews will take place shortly after the application deadline.
How to apply
Please apply by completing the online application form available at www.ecmwf.int/en/about/jobs. To contact the ECMWF Recruitment Team, please email jobs@ecmwf.int. For details of how we will handle your personal data for this purpose, see: https://www.ecmwf.int/en/privacy.
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 States 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, Türkiye 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.