Technical Support Engineer

LuxQuanta as a Technical Support Engineer

At LuxQuanta, we are pioneering the Quantum Communications industry by delivering solutions that use the properties of quantum physics to secure communications. As we spearhead our international expansion after our first three years of solid growth, we invite passionate individuals to join us on our journey — helping us lead the fast-paced Quantum Communications market in Europe and beyond.

About the Role

As a Technical Support Engineer, you'll be the direct technical backbone for our global customer base. Taking full ownership of support operations, you will bridge customer needs with our internal engineering excellence—troubleshooting complex hardware/software system environments, driving incident resolutions, and ensuring our groundbreaking quantum systems deliver flawless reliability in the field.

Main Tasks & Responsibilities

• Customer Technical Ownership: Act as the primary technical point of contact, managing support cases end-to-end while maintaining trust and proactive communication.
• Troubleshooting & Diagnostics: Diagnose, troubleshoot, and resolve technical issues across products, environments, and systems by analyzing logs and system behaviors.
• Incident & Escalation Management: Manage case prioritization under SLAs, handling complex incidents and coordinating with senior engineers for high-impact escalations.
• Cross-Functional Collaboration: Partner closely with Account Managers, Product, and R&D teams to share customer feedback and resolve deep product issues.
• Continuous Improvement: Maintain precise documentation, build troubleshooting procedures, perform root-cause analysis, and recommend preventive measures.
• Degree in Computer Science, Information Technology, Engineering, Physics, or related practical experience.
• 3-4+ years of experience in Technical Support, Application Support, Customer Support, or a similar role.
• Proven track record in managing complex customer-facing technical cases and escalations.
• Strong hands-on experience in log analysis, system diagnostics, and ticketing/case management workflows.
• Exceptional communication, critical thinking, and structured problem-solving skills.
• Proactive mindset with a strong sense of ownership, independence, and accountability.
• Full professional proficiency in English and Spanish.
• Lunch at the office for less than 2€.
• Flexible working hours and hybrid work model.
• Short Fridays during the summer.
• Real opportunities for professional growth in a vibrant, multicultural team in Barcelona.

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

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