**Quark**\- **Grupo Sener** is a global company specializing in the design, project management, and construction management of data centers and critical buildings. With over a decade of experience, we have developed the architecture and engineering of data centers for leading companies in Europe, Africa, and Latin America. Our early specialization and continuous commitment to innovation have made our company a leader in the field, distinguished by talent, quality, and innovative design for this type of facility. Among our company's main assets is our human team, the cornerstone of our current success and key to future growth. Given the strong growth context within the data center industry, we are seeking to strengthen our professional team to develop various projects both within and outside Spain. Currently, we are looking to hire a specialist engineer who will participate in the development and validation of technical solutions in HVAC, ventilation, thermal dissipation, and CFD (Computational Fluid Dynamics) analysis projects. The role will be based in our Madrid or Bilbao offices, reporting to the head of the mechanical department. **What you will do:** * Perform CFD simulations using tools such as Ansys Fluent and Autodesk CFD. * Define boundary conditions, analysis scenarios, and validation criteria. * Interpret results and prepare technical reports with improvement proposals. * Collaborate with multidisciplinary teams (acoustics, structures, electrical systems). * Participate in technical meetings with clients and internal teams. * Support the preparation of technical proposals and tender documentation. **What we expect from you:** * Degree in Mechanical, Aeronautical, Industrial Engineering or similar. * Minimum of 2 years of experience in CFD simulations. * Proficiency in Ansys Fluent (essential) and knowledge of Autodesk CFD. * Advanced level of English (minimum B2\-C1), especially in technical writing and document comprehension. * Knowledge of mesh generation, thermal and ventilation analysis. * Ability to work in a team and manage multiple projects simultaneously. Valued skills: * Experience in data center projects, energy industry, or complex infrastructure. * Familiarity with other simulation software (Star\-CCM\+, 6Sigma, CADNAA). * Experience in collaborative BIM environments or Autodesk Construction Cloud. **What we offer:** These are some of the benefits you will enjoy: * Flexible working hours policies. * Remote work options. * We commit to providing job stability and long\-term projects. * We offer a range of measures to support your 360\-degree development and help you achieve all your goals. * Development Program focused on mentoring for your roles, enabling continued growth and professional advancement.