5G NTN PHY/SDR Engineer

5G-NTN PHY/SDR Engineer 

We are seeking to hire a 5G-NTN PHY/SDR Engineer at Amphinicy Technologies, and who is working on the physical layer (PHY) of a 5G ground segment for Non-Terrestrial Networks (NTN).

You will modify and develop PHY blocks in an OpenAirInterface-based 5G NR stack so that it works over satellite links. You will also integrate and test the end-to-end system, from the UE through the gNB to the core network, on software-defined radio hardware.

You will work closely with our DSP architect and a team covering 5G, satellite communications, and system validation. Your focus will be on the impairments a satellite link adds, such as long delay and large Doppler shifts, and the blocks that must handle them, in all layers such as PHY, MAC, RLC, PDCP, and RRC. The goal is a working demonstrator that serves standard 5G NR devices over satellite.

You will enjoy hands-on work with a real 5G stack and SDR hardware on a 5G-NTN demonstrator, not only simulations, while walking a path to grow from implementation toward PHY design and architecture. At the meeting point of 5G, satellite communications, and real-time signal processing, you will enjoy the close mentoring from experienced DSP and satellite communications engineers. 

The position is based in Luxembourg, with a hybrid working model. 

What we are looking for

• You hold a BSc or MSc in Telecommunications, Electrical Engineering, or a related field. A PhD is a plus. 
• You have at least 2-5 years of hands-on PHY-layer or DSP development for wireless systems.
• You have solid knowledge of digital communications and DSP for OFDM-based systems, such as 5G NR or LTE, including filtering, synchronization, and channel estimation. 
• You also have a good understanding of frequency and timing offset estimation and compensation, including Doppler. 
• You are versed with C/C++ on Linux, and comfortable working in a large existing codebase. The daily use of Git, including branching, merging, and code review comes natural to you. 
• While you have hands-on experience with USRP or similar SDR platforms, you also know about basic networking: IP, UDP/TCP, Ethernet configuration, and Wireshark. 
• A working knowledge of MATLAB or Python for prototyping and analysis is expected. 
• You work independently, debug problems in a structured way, but also integrate well into a small team. 
• You produce clear, well-structured project documentation and reports in excellent English.

What is good to know

• 3GPP NTN features (Release 17 and later), such as timing advance, K_offset, and satellite ephemeris. 
• The OpenAirInterface (OAI) or srsRAN codebase, or GNU Radio. 
• Running real-time workloads in containers or VMs, such as Docker, CPU pinning, and real-time Linux tuning. 
• DVB-S2/S2X

What we offer

• An attractive salary and relocation package.
• A comprehensive training plan, starting with onboarding, which caters to your development needs and helps you achieve your career goals.
• A supportive environment where people come first.
• Flexible work options, with a certain remote possibility.
• An opportunity to work in a challenging, fast-paced environment with the latest technologies which affect the lives of billions of people around the globe.
• Work-life balance which includes an exciting lifestyle in the heart of Europe, in the multicultural city of Luxembourg.

Who we are

Amphinicy Technologies is a leading provider of complex software solutions for the space industry. We have been delivering solutions to the top players and organizations in the satellite and space industry for over 20 years, from our two offices in both Croatia and Luxembourg. Our engineers are leading experts in the domains of Satellite Communication and Earth Observation, and our unending focus is the perpetual improvement of the quality and efficiency of our state-of-the-art solutions in a creative, enjoyable, and supportive work environment.

Luxembourg

Luxembourg is situated at the crossroads of Europe, between Germany, Belgium, and France. Despite its small size, it sports a powerful economy with several well paid and diverse job opportunities, and with long-term career prospects. World-class infrastructure, one of the best healthcare systems in Europe and a vibrant and multicultural nightlife complete the puzzle of one of the best countries to live and work in.

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