Senior Engineer, RF/Performance RAN Simulation, IRIS2 (5G-NTN)

Location: Betzdorf, Luxembourg; 60% onsite from the office. Travel is required as needed for project realization.

Company

hirify.global is working with consortium partners to build and operate IRIS², a European Union secure multi-orbit satellite communications constellation.

What you will do

• Define and develop RAN/RF performance models and simulations for 5G and 5G-NTN, covering coverage, capacity, link budget, throughput, latency, interference, mobility, and service availability.
• Analyze 5G call flows and radio procedures, including synchronization, random access, RRC connection establishment, registration, PDU hirify.globalsions, mobility, and beam management.
• Model FR2 RF performance involving propagation, beamforming, antenna gain, EIRP, G/T, path loss, atmospheric loshirify.global, interference, Doppler, timing advance, and link adaptation.
• Study beam hopping and coverage enhancement, including beam planning, resource allocation, dwell time, service continuity, and user experience.
• Support technical studies, testing, validation, system design trade-offs, and RFP/RFQ preparation by translating simulation results into requirements, acceptance criteria, and supplier evaluation inputs.
• Document assumptions, models, results, sensitivity analyhirify.global, risks, and design recommendations while collaborating with RAN, RF, satellite, software, IVV, procurement, and supplier teams.

Requirements

• Master’s degree in engineering or science, preferably Telecommunications, Radio Communications, RF Engineering, Signal Processing, or a related discipline.
• Telecom, satellite communications, or radio engineering industry experience; 7+ to 10+ years of relevant industry experience is preferred for the Senior Engineer level.
• Strong knowledge of 3GPP 5G RAN and 5G-NTN standards, radio access procedures, physical-layer assumptions, RRC behaviour, SSB scheduling, MIB/SIB broadcasting, and radio resource management.
• Hands-on RAN/RF performance modelling covering call-flow impacts, radio resource allocation, coverage, capacity, throughput, latency, link budget, interference, and mobility.
• Good understanding of PHY/MAC interaction, RLC, PDCP, RRC, SSB scheduling, MIB/SIB broadcasting, random access, HARQ, link adaptation, and scheduling principles.
• Experience using MATLAB or equivalent tools to build simulations, run parameter studies, analyze results, generate plots, and support RAN/RF design decisions; Python, link-level simulators, system-level simulators, or radio planning tools are relevant environments.
• Knowledge of 5G-NTN constraints and enhancements, including satellite delay, Doppler, feeder and user links, beam management, beam hopping, coverage enhancement, and service continuity.
• Ability to define and apply testing and validation principles covering requirements traceability, simulation assumptions, test coverage, performance KPIs, acceptance thresholds, and comparisons with lab or field results.
• Eligibility for “SECRET” security clearance under national regulations and EU/ESA/NATO equivalents is required.

Nice to have

• FR2 RF performance analysis, including mmWave propagation, beamforming, antenna patterns, blockage, atmospheric attenuation, high-gain antennas, and RF link-budget trade-offs.
• Beam hopping, dynamic coverage management, energy-saving techniques, or AI/ML-based optimization for 5G RAN or 5G-NTN systems.
• 3GPP-based performance studies, including specification interpretation, system assumptions, KPIs, simulation campaigns, and technical contributions to design or supplier discussions.
• Experience contributing to RFP/RFQ packages, including technical requirements, performance-model assumptions, simulation evidence, acceptance KPIs, and vendor-response evaluation.

Culture & Benefits

• Permanent employment contract.
• Cross-disciplinary collaboration with engineering, software, IVV, procurement, and supplier teams.
• Work is performed 60% onsite from the office, with travel required for project realization.
• Support for demanding study, simulation, integration, and validation schedules.