Research Software Engineer Full Time (40 h/w) Klosterneuburg near Vienna, Austria / Home Office possible EUR 54,000* gross/year ISTA is growing. Grow with us! Institute of Science and Technology Austria (ISTA) is a constantly growing international institute for conducting world-class research in mathematics, computer science, life sciences & physical sciences. We strive to recruit passionate professionals from across the world over all fields who strive to support our goal of excellent research. Located within a beautiful campus on the outskirts of Vienna, we offer multiple opportunities for personal growth in a stable working environment. Get an insight! Your responsibilities We are seeking a skilled and proactive Scientific Software Engineer to join the Scientific Computing Facility (SciComp) at ISTA. In this role, you will collaborate closely with researchers and the SciComp team to refactor, optimize, and port scientific applications across different programming languages and architectures. You will identify and resolve computational bottlenecks, modernize legacy codebases, and adapt scientific software for high-performance execution on modern CPU and GPU systems. * Refactor and modularize existing scientific software to improve performance, maintainability, and scalability * Port and translate scientific applications between languages (e.g., Python, C/C++, Fortran, MATLAB) * Profile and optimize numerical algorithms for modern HPC systems (CPU, GPU, and hybrid environments) * Collaborate with researchers to adapt workflows to parallel and distributed computing architectures * Implement automated testing and CI/CD pipelines for research codebases * Contribute to internal software engineering best practices, documentation, and reusable libraries * Support the adoption of reproducible and maintainable software development practices across research groups Your profile * Education: Degree in Computer Science, Computational Science, Physics, Applied Mathematics, or a related field * Programming skills: Strong proficiency in Python, C/C++, and/or Fortran * Numerical methods: Solid understanding of algorithmic optimization and numerical techniques * Experience: Proven track record in developing or optimizing scientific libraries and applications * Software practices: Familiarity with Git, unit testing, and CI/CD workflows * Parallelization: Experience with MPI, OpenMP, CUDA, or OpenACC * HPC environment: Experience deploying and running scientific applications on Slurm-based clusters * Strong debugging skills, ability to work in a team, flexibility, and commitment to high-quality results Apply now Your benefits * Education & training * Cafeteria * Childcare * Free shuttle bus * Multiple health offers * Pension insurance This position comes with possible overpayment depending on education, qualification and work experience. ISTA processes your personal data in accordance with the law. For more information, please refer to ww www.ista.ac.at/data-protection. Am Campus 1, 3400 Klosterneuburg, Austria Tel.: 43 (0) 2243 9000-0 www.ista.ac.at