ph3Aim high, go beyond! /h3 pAt Open Cosmos we are solving the world’s biggest challenges from space, providing businesses, governments and researchers access to more readily available information than ever before - ready for the challenge? Then read on… /p pThe Satcom team is responsible for the design, delivery and performance of Open Cosmos’ satellite communications services, spanning the space segment, ground infrastructure and general connectivity. /p pAs our Satcom capability continues to grow, we’re now looking for an Air Interface Architect to define and govern the end-to-end PHY and MAC layer architecture underpinning our LEO communication system, shaping how high-performance, scalable connectivity is delivered across the constellation. /p h3What will you be doing? /h3 ul liDefining the end-to-end L1/L2 architecture for satellite communication systems aligned to 3GPP NR-NTN and DVB-S2X standards /li liTranslating LEO dynamics including Doppler effects, latency, beam movement, and visibility constraints into air interface requirements /li liDriving waveform, numerology, frame structure, and resource allocation design for high spectral efficiency and throughput /li liDefining coding, modulation, and link adaptation strategies across varying link and environmental conditions /li liArchitecting MAC layer protocols including scheduling, HARQ/ARQ, multiplexing, and resource management mechanisms /li liDefining mobility and handover frameworks across satellites, gateways, and user terminals /li liSpecifying synchronisation mechanisms including timing advance and frequency pre-compensation strategies /li liSupporting integration between the air interface and core network functions for NTN connectivity and mobility management /li liLeading system-level and link-level modelling and simulation activities to validate performance and optimise design decisions /li liDefining modem architecture and functional partitioning across FPGA/ASIC and software layers to support multi-waveform operation /li liContributing to future roadmap activities aligned with evolving 3GPP NTN and satellite communication standards /li /ul h3What You’ll bring /h3 ul liDeep understanding of wireless communication systems and PHY/MAC layer architecture principles /li liStrong knowledge of 3GPP New Radio NTN standards and familiarity with DVB-S2X /li liUnderstanding of waveform design, numerology, frame structures, and resource allocation mechanisms /li liKnowledge of channel coding and modulation techniques including LDPC, Polar, BCH, and Adaptive Coding and Modulation (ACM) /li liStrong understanding of link adaptation, CSI-driven optimisation, and power control strategies /li liKnowledge of MAC layer protocols including scheduling, HARQ/ARQ, and resource multiplexing in high-latency environments /li liUnderstanding of mobility management and synchronisation within highly dynamic communication systems /li liCapability to translate orbital dynamics and LEO constraints into robust air interface specifications /li liProficiency in system-level and link-level modelling and simulation for performance validation and optimisation /li liUnderstanding of modem architecture and partitioning between FPGA/ASIC and software-based implementations /li liA systems-thinking mindset with the ability to balance performance, scalability, compliance, and real-world implementation considerations /li /ul pThis role will be based in any of our locations. /p pTo apply, you must have the legal right to work in your chosen location. /p pWhen applying, please submit your CV in English. /p h3Why Open Cosmos? /h3 ul liWork at the cutting edge of space technology with customers around the globe /li liA mission-driven company making space accessible to help solve real-world challenges /li liA diverse, ambitious, and supportive team /li /ul /p #J-18808-Ljbffr

📌 Air Interface Architect (Barcelona)
🏢 PassFort
📍 Barcelona