We are hiring
Join LuxQuanta as a Field Service Engineer
At LuxQuanta, we are pioneering the Quantum Communications industry with quantum physics-based security solutions.
As we expand internationally, we're looking for a passionate
Field Service Engineer
to act as the face of LuxQuanta at customer premises, owning the end-to-end deployment and onboarding journey.
About the Role
As Field Service Engineer, you'll bridge post-sale customer onboarding, site readiness, installation, and hands-on commissioning.
You combine technical depth, strong ownership, and a customer-oriented mindset to ensure flawless deployments, resolve unexpected field issues autonomously, and turn every customer into a reference story.
With your true Startup DNA, you bring a pragmatic, highly versátil mindset, ready to step into adjacent operational areas to ensure complete project success.
Main Tasks & Responsibilities
End-to-End Onboarding & Deployment:
Lead pre-installation planning, site surveys, and readiness requirements (rack space, power, optical infrastructure, and access procedures).
System Installation & SAT:
Install, configure, and test LuxQuanta QKD systems at customer sites in Spain and abroad, validating optical link quality (OTDR, loss budgets) and executing Site Acceptance Tests (SAT).
Autonomous Troubleshooting:
Lead on-site and remote troubleshooting, escalating structured technical feedback to R&D; and Support teams to drive issues to closure.
Customer Advisory & Training:
Conduct on-site knowledge transfer for customer operators and serve as a trusted technical voice across technical and management levels.




Field Feedback & Hand-over:
Document all interactions in CRM/ticketing systems, maintain installed-base records, and help improve deployment playbooks and manuals with R&D.;
Degree in Telecommunications, Electrical/Electronic Engineering, Computer Science, Physics (photonics), or IT.
5–7+ years in customer-facing technical roles, including hands-on experience installing and commissioning telecom, networking, or optical equipment.
Fluency (spoken & written) is mandatory, as you will interact daily with international technical teams and management at their facilities.
Spanish is also required.
Travel Availability:
High availability to travel frequently to customer premises in Spain and internationally (up to 75% of total working time) and valid driving licence.
Solid foundation in networking (TCP/IP, routing, switching, VLANs), Linux environments (SSH, CLI, scripting with Bash/Python), and fiber-optic handling (connectors, OTDR, power meters).
Familiarity with network security concepts (PKI, TLS, IPsec, firewalls) and monitoring protocols (SNMP, REST APIs) is highly valued.
Highly autonomous, cool-tempered under pressure, with a valid driving licence and willingness to travel frequently (up to 75% internationally/nationally).
Flexible working hours & Barcelona-based location
Short Fridays in summer & real growth opportunities in a vibrant team
We are committed to building a diverse and inclusive workplace where every voice contributes to solving genuinely hard problems.
Ready to secure the future of communications?
#J-*-Ljbffr

📌 Field Service Engineer (Barcelona)
🏢 LuxQuanta
📍 Barcelona