Quantum Hardware Packaging

Qilimanjaro Quantum Tech is a leading European quantum computing company. We deliver cutting-edge analog and digital-analog quantum computing platforms to top-tier research institutions and industrial partners. Our mission is to bring practical quantum advantage to the world through high-performance systems and expert services.

We are now expanding our Deployment Team to support ambitious initiatives like EuroQCS, and we are looking for motivated hands-on professionals to help us build and install our next-generation quantum computers.

Why we’re hiring

As our hardware scales (flip-chip, PCBs, dense wiring, resonators, shields), simulation quality becomes a bottleneck. We need someone who can run reliable RF/EM simulations, build verification discipline, and produce studies the team can trust to set direction.

The Role

We are looking for an RF/EM Simulation Engineer to own electromagnetic and circuit simulations for quantum hardware packaging and interconnects. You will work at the intersection of:

• Resonators / coupling networks
• Flip-chip / bump interfaces and clearances
• Superconducting PCBs and wiring
• Crosstalk / parasitics / impedance matching
• Sensitivity to misalignment & manufacturing tolerances

This role is a mix of simulation + engineering judgement + methodology.

🫡 Key Responsibilities:

Build and run EM simulations in Keysight ADS (Momentum/RFpro/Quantumpro) and/or Ansys HFSS (or CST) for structures such as resonators, couplers, transitions, shields, and interconnects.

Define simulation best practices for the team:

• Mesh and convergence criteria
• Boundary conditions
• Port definitions and calibration
• Material models (including superconducting approximations)
• Geometry clearance rules

Produce trustworthy studies:

• Frequency placement / dispersion
• Coupling and inductance extraction
• Crosstalk and mode analysis
• Sensitivity vs clearance, misalignment, tolerances

Create validation loops:

• Compare EM results with measurements when available
• Generate simple test structures for correlation
• Maintain “simulation vs measurement” dashboards / reports

Deliver design recommendations and “sign-off” notes for tapeout readiness.

Collaborate with chip designers, packaging engineers, and experimental teams to translate simulation outcomes into practical design rules.

📝 Minimum requirements:

• BSc/MSc in Electrical Engineering, Physics, Telecommunications, or similar
• Strong hands-on experience with ADS and/or HFSS (academic or industrial)
• Ability to run simulations with discipline: ports, boundaries, convergence, verification
• Understanding of RF fundamentals: resonators, impedance, S-parameters, parasitics
• Strong attention to detail and willingness to challenge results until they are defensible

🤹 Preferred Skills:

• Experience with superconducting circuits / cryogenic RF (not mandatory)
• Familiarity with EM/circuit co-simulation (ADS + EM extraction, HFSS + circuit)
• Experience with tolerance analysis / Monte Carlo / robust design
• Python/MATLAB for post-processing and automation
• Prior work on PCBs, interconnects, packaging, or microwave structures

You don’t need prior “quantum” experience. We will teach the domain; we need the simulation rigor.

What success looks like (first 3–6 months)

• Establish a repeatable simulation workflow with clear checklists (ports, mesh, convergence, geometry rules).
• Produce a validated resonator study and a coupling/inductance extraction report that the team uses for design decisions.
• Deliver a “design rule” document for clearances and tolerances to avoid frequency shifts and unrealistic sensitivity.
• Reduce design iteration surprises by correlating at least one key structure to measurement.

Why don’t you join us? 🥇

You will:

🚀 Get the opportunity to build something amazing and unique, something that hasn't been done before

🌍 Work on ground-breaking projects and possibly solve massive challenges on a global scale

💻 Be at the intersection of research and industry, where biggest innovations happen

🎯 Make an enormous impact in a dynamic scale-up rather than being a small cog in a big machine

💫 Work with super smart, knowledgeable and yet, very friendly people in Barcelona, one of the best cities in the world (picture a lot of sun, amazing food and friendly locals)

😊 Get to be part of a start-up where growth on a company and individual level is the default

DATA CONTROLLER: QILIMANJARO QUANTUM TECH S.L., B67429670, Carrer de Veneçuela, 74, 08019 Barcelona (BARCELONA), Data Protection Officer: qilimanjaro@delegado- datos.com.PURPOSES: Participation in recruitment processes and reference verification.LEGAL BASIS: Implementation of pre-contractual measures.DISCLOSURES: None are an ticipated.DATA RETENTION: For the duration of the selection process.RIGHTS: You may exercise your rights of access, rectification, erasure, restriction, and data portability with the data controller. In case of any disputes, you may contact the AEPD (www.aepd.es).