At

LuxQuanta , we are pioneering the Quantum Communications industry with quantum physics-based security solutions for major telecom operators globally. As we accelerate our international expansion, we are looking for a high-energy

Senior Pre-Sales Engineer

to drive technical sales with Tier-1 carriers and wholesale operators.

About the Role As Senior Pre-Sales Engineer, you’ll bridge customer needs, business goals, and internal technical execution. You are a tech-commercial powerhouse who can spark interest, design complex optical network solutions, and close B2B deals while coordinating R&D;, Product, and Operations.

With your true Startup DNA, you bring a hands-on, highly flexible mindset, ready to step into adjacent areas whenever needed to ensure smooth project success.

Main Tasks & Responsibilities

International Presales Leadership:

Drive technical presales, solution architecture, and RFP/RFI responses for international carriers and wholesale operators.

Integral Client Engagement:

Lead technical pitch sessions, product demonstrations, and PoCs with C-level stakeholders and network directors worldwide.

Optical Network Architecture:

Design tailored quantum-encrypted optical proposals over existing fiber networks (DWDM, OTN, ROADM).





Cross-Functional Alignment:

Work hand-in-hand with internal R&D;, Product, and Sales teams to deliver winning technical proposals.

Field Support & Travel:

Act as our trusted technical advisor on-site with international clients and industry congresses.

Degree in Telecommunications, Electrical Engineering, or related discipline.

7–10+ years

of experience as a Pre-Sales Engineer, Solution Architect, or Technical Account Manager in B2B Telecoms.

Solid technical foundation in

Optical Transport, DWDM, OTN, ROADM, and Fiber Optics .

Strong track record working with

Carriers, Operators, Wholesale, or Hyperscalers .

Fluent in both English AND German

(C1/Negotiation level is required for both languages)

Willingness to travel internationally for key client engagements.

Flexibility:

100% Remote position

(with travel as required by clients/events).

Perks & Culture:

flexible working hours, and real growth opportunities in a pioneering DeepTech scale-up.

We are committed to building a diverse and inclusive workplace where every voice contributes to solving genuinely hard problems.

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📌 Senior Pre-sales engineer (Madrid)
🏢 LuxQuanta
📍 Madrid