LuxQuanta in Barcelona is seeking a Senior Pre-Sales Engineer to bridge customer needs with technical execution across Europe and beyond. You will lead presales, design complex solutions, and close B2B deals while coordinating R&D;, Product, and Operations.You bring 7–10 years in telecom presales, deep fiber optics expertise (DWDM, OTN), strong negotiating skills, willingness to travel, and fluency in English and Spanish. The role offers a hybrid setup with frequent client visits.