ph3WHO ARE WE? /h3 pSateliot is a Barcelona-based startup in the New Space sector, becoming the first satellite telecommunications operator that will provide global and continuous connectivity to all the elements that will make up the massive Internet of Things (IoT) universe under the 5G protocol. In order to do so, Sateliot is launching a constellation of last generation nanosatellites located at low altitude that act as mobile towers. Sateliot is the perfect complement for large telecommunications companies by providing them with the necessary infrastructure where terrestrial technologies do not arrive. /p h3YOUR MISSION /h3 pSateliot is seeking a Principal Mechanical Engineer to lead mechanical and thermal-structural engineering across the full lifecycle of an advanced LEO satellite platform and payload antenna system. This role requires a deep first-principles approach to mechanical design, combined with hands‑on expertise in developing lightweight, deployable, semi‑rigid space structures that must survive launch loads, deploy reliably in orbit, and maintain performance through aggressive LEO thermal cycling. The successful candidate will take ownership from early concept and detailed design through manufacturing, qualification, integration, testing, and on‑orbit support. /p h3Your Main Functions /h3 h3Mechanical Architecture Structural Leadership /h3 ul liOwn the mechanical design of the satellite bus structure and payload antenna assemblies. /li liLead architecture decisions using physics‑based first principles reasoning, balancing mass, stiffness, thermal stability, and manufacturability. /li liDrive structural trade‑offs for LEO‑class spacecraft where volume and mass efficiency are critical. /li /ul h3Deployable Lightweight Space Structures /h3 ul liDesign and qualify deployable mechanisms and semi‑rigid lightweight structures (antenna deployment systems, panels, booms, hinges). /li liEnsure robust repeatability, stiffness, and dimensional stability after deployment. /li liAddress latch design, hold‑down release mechanisms, tolerances, and deployment dynamics in orbit. /li /ul h3LEO Orbital Mechanical Environment Expertise /h3 ul liDesign spacecraft structures for the unique challenges of LEO operation, including: ul liHigh‑frequency thermal cycling (eclipse transitions)



/li liThermo‑elastic distortion affecting payload pointing and RF performance /li liAtomic oxygen degradation of exposed materials /li liMicrogravity‑induced structural behaviour changes /li /ul /li /ul h3Launch Survivability Mechanical Qualification /h3 ul liEnsure all mechanical systems meet launcher and environmental requirements, including: ul liRandom vibration /li liAcoustic loading /li liShock events (separation, pyro‑shock) /li /ul /li liDefine qualification and acceptance approaches suitable for LEO constellation‑style deployment, balancing reliability and production cadence. /li /ul h3Full Engineering Lifecycle Ownership /h3 ul liLead mechanical development through the complete lifecycle: ul liConcept design and prototyping /li liDetailed CAD and manufacturing release /li liSupplier engagement and production readiness /li liAssembly, Integration Test (AIT) /li liQualification campaigns (vibration, thermal vacuum, deployment testing) /li /ul /li /ul h3Structural Analysis Verification /h3 ul liOversee structural analysis activities, including: ul liFEM development and correlation /li liModal analysis, static margins, buckling, dynamic response /li /ul /li liEstablish verification plans compliant with ECSS/NASA/launcher requirements. /li liSupport hardware test execution, anomaly resolution, and design iteration. /li /ul h3Cross‑Functional Technical Leadership /h3 ul liAct as mechanical technical authority interfacing with systems, RF, thermal, avionics, manufacturing, and mission teams. /li liMentor engineers and elevate structural/mechanical rigor across the organization. /li /ul h3REQUIREMENTS /h3 h3General /h3 ul liMSc or PhD in Mechanical Engineering, Aerospace Engineering, or related discipline. /li /ul h3Professional Experience /h3 ul li10+ years of experience delivering flight mechanical hardware for spacecraft or high‑reliability aerospace systems. /li liStrong first‑principles structural and thermal‑mechanical reasoning capability. /li liProven experience designing for: ul liLaunch vibration and shock environments /li liThermal‑vacuum operation in LEO /li liDeployable spacecraft structures and antenna systems /li /ul /li /ul h3Tools Technical Competencies /h3 ul liStructural simulation: ANSYS, Abaqus /li liUnderstanding of coupled thermal‑structural effects preferred /li liExperience with qualification documentation, test correlation,



and margin tracking /li /ul h3Personal Attributes /h3 ul liPhysics‑driven engineer with deep curiosity and rigor /li liEnd‑to‑end ownership mindset across design → test → flight /li liStrong balance of analytical depth and practical build/test execution /li liComfortable working in fast‑paced, high‑performance LEO development environments /li /ul h3NICE TO HAVE /h3 ul liMechanical ownership of deployable antenna reflectors, phased‑array panels, booms, or other lightweight space deployable. /li liDeep familiarity with spacecraft structural materials and processes: ul liCFRP composites /li liAluminium and titanium alloys /li liPrecision machining and additive manufacturing where appropriate /li /ul /li liWorking knowledge of atomic oxygen, outgassing, contamination, and material selection for LEO. /li liExperience supporting cleanroom integration and test campaigns. /li /ul h3WHAT YOU’LL FIND WHEN WORKING AT SATELIOT /h3 pYou will be part of one the fastest‑growing start‑ups in Spain with general reach along getting into the challenging world of New Space Telecommunication. /p pOur culture is based on embracing openness by welcoming multicultural talent, being respectful with everybody and being open to exchange ideas. We are also committed to a healthy lifestyle by helping our team balance their work and personal life and also by providing them facilities for healthy habits. /p pWe are a driven team with big goals, that seek for people who are genuinely passionate about their work and that also want to keep learning and getting better personally and professionally! /p h3WHAT DO WE OFFER? /h3 ul liFull time permanent Contract /li liHybrid Work Model /li liSchedule flexibility /li liFlat and transparent organizational structure /li liBuddy Program to help you with your integration during your first month ? /li liFlexible compensation package: Tax benefits with ticket restaurant, transportation and kindergarten, training programs. /li liWe promote good physical and mental health, with a Health insurance, Fresh fruit in the office and the possibility of sharing the cost of bicycle transport or gyms. /li liWork in a dynamic, multidisciplinary and multicultural environment that will allow you to boost your professional career /li liTo be part of a strong, international, friendly and motivated team, where you can progress both personal and professionally ? /li liThe chance to be part of one of the most exciting and disruptive space projects in Europe ? /li /ul /p #J-18808-Ljbffr

📌 Principal Mechanical Engineer (Barcelona)
🏢 Sateliot
📍 Barcelona