Business Area: Friisat

Freezz is a dynamic, young high-tech space company operating across three core European locations (Switzerland, Italy, Spain). We’re strongly committed to delivery and rapid growth in the commercial satellite and space connectivity sector. We’re developing next-generation solutions in two core markets: Direct-to-Device (D2D) Connectivity and Friilink. We combine aerospace expertise with startup speed and deliver-first discipline. FRIISAT is Freezz’s flagship constellation programme—a large-scale Very Low Earth Orbit (VLEO) constellation delivering D2D connectivity across Europe and globally. The programme encompasses a Spacecraft Platform, Ground Infrastructure, and Payload & Services. The FRIISAT programme is co-funded by ESA’s IRIS² initiative and represents a critical step toward European strategic autonomy in satellite communications. You’ll drive spacecraft system engineering across the full lifecycle: from architecture definition through manufacturing, integration, verification, testing and launch preparation.

What You Will Do

• Spacecraft system engineering, system analyses and architecture definition.
• Requirements management, Interface Control Documents (ICDs) and system budgets.
• Cross-platform interface control: platform, payload, and external systems.
• Mission and orbital analysis translation into spacecraft design requirements.
• Mass, power, data, RF, thermal and other system budgets.
• Thermal and structural design assessment; launch loads and environmental constraints.
• Engineering trade-offs, system performance assessments and design optimisation.
• COTS component selection, screening, testing and adaptation for space qualification.
• Radiation, thermal-vacuum, vibration and EMC constraint management.
• Design-to-cost, design-for-manufacturing and design-for-test principles.
• Early prototyping, iterative testing and rapid hardware improvements.
• Supplier coordination, technical documentation and design reviews.
• Direct participation in Assembly, Integration, Verification and Test (AIT/AIV).

What We Are Looking For

• 3–6 years in satellite/spacecraft development (platform and payload experience valued).
• Strong grasp of spacecraft system engineering: requirements, ICDs, budgets, trade-offs.
• Solid understanding of mission analysis and orbital mechanics.
• Hands-on experience with spacecraft thermal and mechanical design at system level.
• Experience in hardware development, integration, verification and testing.
• Full lifecycle spacecraft development knowledge from early design through manufacturing, AIT/AIV and launch.
• Comfortable working across multiple engineering disciplines and with manufacturing teams.
• Strong technical problem-solving and a hands-on, product-oriented mindset.
• Professional working proficiency in English.
• Degree in Aerospace, Electronics, Telecommunications, Mechanical Engineering or equivalent.
• You combine strong spacecraft-level engineering capability with a hands-on approach. You’re equally comfortable working with requirements, ICDs and system budgets as you are discussing subsystem design with specialists or working directly with hardware, suppliers and test teams. You think in terms of production scalability, cost and schedule—not just performance. You want to move fast and build something real.

Valuable Additional Experience

• New Space or commercial satellite background, COTS adaptation and space qualification experience.
• Mission analysis tools, spacecraft thermal or structural analysis, design-for-manufacturing.
• Rapid prototyping, design-to-cost experience, small-series or serial production.
• Telecommunications/RF payload knowledge, or launch campaign experience.

Why Join Us & Hiring Details

• Ship real hardware quarterly, not every three years.
• Influence mission architecture from day one—no committee overhead.
• Work with a lean, focused engineering team.
• Based in Tuscany with hybrid flexibility.
• Part of a European New Space success story backed by ESA and EU programmes.
• Hiring Timeline: We’re hiring now with a fast-track process. Target decision turnaround: 2–3 weeks from application to offer (subject to interview scheduling). We offer flexibility on work location during onboarding: Hybrid or remote start with transition to hybrid/regional HQ. Relocation support is available. After onboarding, hybrid work is standard.
• Compensation: Competitive salary in the high range for the region, commensurate with experience and proven track record. Benefits include flexible working arrangement, professional development support, and equity participation in Freezz’s growth. Stock options plan details are currently being finalized and will be shared during the offer stage.

How to Apply

• Please fill up the application form on this page.
• Where relevant, candidates are encouraged to include examples of technical projects, publications, portfolios, Git repositories, or descriptions of systems they have helped design.
• Freezz welcomes applicants from different backgrounds. Selection decisions are based on professional qualifications, experience, and the requirements of the position.
• We review applications on a rolling basis and respond within 5 business days. We’re actively hiring and moving fast. If you’re a strong fit, expect to hear from us quickly.

Shape the integration of satellite and terrestrial mobile networks. Freezz is developing Friisat, an integrated satellite-connectivity platform designed to complement terrestrial mobile networks. Using satellites in Very Low Earth Orbit, Friisat aims to provide reliable, low-latency connectivity directly to personal and vehicular devices. For our locations in Italy and Switzerland we are looking for a 5G/NTN Network Engineer to design, simulate, integrate, and validate the network architecture behind the Friisat service.

What You Will Do

• Define end-to-end 5G/NTN architectures covering space, ground, radio-access, transport, and core-network segments.
• Translate service and coverage objectives into network requirements, interfaces, configurations, and operational procedures.
• Analyse 3GPP specifications and identify the features, constraints, and implementation choices relevant to Friisat.
• Design network behaviour for registration, authentication, mobility, paging, handover, routing, and service continuity.
• Address NTN-specific effects including long and variable delays, Doppler, satellite movement, moving cells, timing relationships, and intermittent visibility.
• Support the development tasks in the area of gNB, payload compute, service and feeder link.
• Contribute to NTN-RAN, and 5G Core integration.
• Model network capacity, coverage, availability, latency, traffic demand, and quality of service.
• Define resource-management, beam-management, mobility-management, and network-selection strategies.
• Develop network simulations, prototypes, test plans, and system-level validation environments.
• Analyse protocol traces and troubleshoot issues across RRC, PDCP, RLC, MAC, PHY, transport, and core-network functions.
• Work with RF, DSP, embedded-software, cloud, security, and satellite-systems teams.
• Support demonstrations, partner integrations, field trials, and interoperability testing.
• Support spectrum coordination or telecommunications regulatory requirements related activities.
• Maintain technical documentation and contribute to standards and design reviews.

What We Are Looking For

• Master’s degree in telecommunications, networking, electrical engineering, computer engineering, or a related field; or equivalent practical experience.
• Strong knowledge of 4G/5G architecture and 5G New Radio.
• Understanding of RAN functions, protocol layers, mobility, radio-resource management, QoS, and 5G Core interactions.
• Practical knowledge of 3GPP NTN architecture and satellite-network constraints.
• Experience with network design, simulation, integration, optimisation, or protocol testing.
• Ability to interpret standards and convert them into implementable system requirements.
• Familiarity with IP networking, routing, transport protocols, security, and network observability.
• Strong troubleshooting and systems-thinking skills.
• Professional working proficiency in English.

Valuable Additional Experience

• 3GPP Release 17 or later NTN specifications.
• Direct-to-Device or Direct-to-Cell satellite services.
• Open-source or commercial 5G stacks and network simulators.
• Private 5G networks, virtualised RAN, or cloud-native 5G Core deployments.
• Network slicing, edge computing, service orchestration, or software-defined networking.
• Satellite gateways, regenerative payloads, transparent payloads, or inter-satellite links.
• Python, C++, packet analysis, network automation, or data-analysis tools.
• Telecommunications standards, spectrum regulation, and operator interoperability.

Why Join Us & Hiring Details

You will help define how a new satellite constellation behaves as part of the wider mobile ecosystem. The role offers the opportunity to influence architecture, standards implementation, system performance, and the real-world integration of terrestrial and non-terrestrial networks.

How to Apply

• Please fill up the application form on this page.
• Where relevant, candidates are encouraged to include examples of technical projects, publications, portfolios, Git repositories, or descriptions of systems they have helped design.
• Freezz welcomes applicants from different backgrounds. Selection decisions are based on professional qualifications, experience, and the requirements of the position.
• We review applications on a rolling basis and respond within 5 business days. We’re actively hiring and moving fast. If you’re a strong fit, expect to hear from us quickly.

Develop the signal-processing technology behind direct satellite connectivity. Freezz is developing Friisat, an integrated satellite-connectivity platform designed to complement terrestrial mobile networks. Using satellites in Very Low Earth Orbit, Friisat aims to provide reliable, low-latency connectivity directly to personal and vehicular devices. For our locations in Italy and Switzerland we are looking for a Telecommunications Engineer with strong expertise in Low-PHY implementation, digital signal processing, beamforming, and FPGA/SDR development.

What You Will Do

• Design and implement Low-PHY algorithms for satellite and terrestrial wireless communication systems.
• Develop solutions for synchronisation, modulation and demodulation, channel estimation, equalisation, coding, decoding, and link adaptation.
• Design and optimise precoding, beamforming, beam-management, and spatial signal-processing algorithms.
• Address satellite-specific challenges such as Doppler shift, propagation delay, time and frequency offsets, moving coverage areas, and rapidly changing channels.
• Create floating-point and fixed-point models using MATLAB, Simulink, Python, C, or C++.
• Convert algorithmic models into efficient FPGA implementations.
• Develop, integrate, and validate FPGA logic using VHDL, Verilog, SystemVerilog, HLS, or comparable technologies.
• Build SDR-based prototypes for rapid algorithm validation and over-the-air testing.
• Optimise designs for throughput, latency, FPGA resources, memory use, power consumption, and numerical accuracy.
• Integrate PHY components with RF front ends, embedded processors, higher protocol layers, and network-control systems.
• Define test vectors, automated verification procedures, and hardware-in-the-loop test environments.
• Investigate performance issues across algorithms, firmware, RF hardware, and network configuration.
• Contribute to Friisat’s technical roadmap and system-design reviews.

What We Are Looking For

• Degree in telecommunications, electrical engineering, signal processing, computer engineering, or a related discipline; or equivalent practical experience.
• Strong knowledge of digital communications and DSP fundamentals.
• Practical understanding of OFDM, MIMO, channel coding, channel estimation, synchronisation, equalisation, and digital beamforming.
• Experience implementing DSP algorithms on FPGA or SDR platforms.
• Proficiency with at least one HDL and one modelling or programming environment.
• Understanding of fixed-point design, clock-domain crossing, high-speed data paths, timing closure, and FPGA resource optimisation.
• Working knowledge of 5G NR radio technology, RAN architecture, and 3GPP NTN concepts.
• Ability to analyse a complete communication chain rather than treating PHY implementation in isolation.
• Professional working proficiency in English.

Valuable Additional Experience

• Master’s degree in telecommunications, electrical engineering, signal processing, computer engineering, or a related discipline; or equivalent practical experience.
• Experience with AMD/Xilinx, RFSoC, USRP.
• MATLAB/Simulink HDL workflows, GNU Radio, or custom SDR frameworks.
• Adaptive beamforming, phased arrays, precoding, or interference cancellation.
• 3GPP Release 17 or later NTN features.
• Satellite channel modelling and link-budget analysis.
• Fronthaul interfaces, Low-PHY/High-PHY partitioning, or accelerator architectures.
• Embedded Linux, device drivers, or FPGA – CPU integration.
• CI pipelines and automated verification for FPGA or DSP development.

Why Join Us & Hiring Details

This role sits at the centre of Friisat’s technology stack. You will take communication concepts from mathematical models to real-time hardware and help solve the unique signal-processing challenges of connecting fast-moving satellites directly to terrestrial devices.

How to Apply

• Please fill up the application form on this page.
• Where relevant, candidates are encouraged to include examples of technical projects, publications, portfolios, Git repositories, or descriptions of systems they have helped design.
• Freezz welcomes applicants from different backgrounds. Selection decisions are based on professional qualifications, experience, and the requirements of the position.
• We review applications on a rolling basis and respond within 5 business days. We’re actively hiring and moving fast. If you’re a strong fit, expect to hear from us quickly.