LuxQuanta, a pioneering quantum communications scale-up, seeks a Senior Pre-Sales Engineer to drive technical sales with Tier-1 carriers and wholesale operators worldwide. You will design complex optical network solutions, lead international presales, deliver product demonstrations and PoCs, and coordinate R&D;, Product, and Sales to win bids. A true startup DNA mindset means hands-on flexibility and readiness to travel, with 100% remote work and general client engagements.