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Air Interface Architect

The Air Interface Architect will define and govern the physical and MAC layer architecture for Open Cosmos' LEO satellite communication system, ensuring high performance and scalability. The role involves designing waveforms, resource allocation, coding, modulation, and handover frameworks, while aligning with 3GPP NR-NTN and DVB-S2X standards. Responsibilities include system-level simulation, modem architecture definition, and integration with core network functions for non-terrestrial networks.

Open Cosmos Ltd Didcot, OX11 0RL, United Kingdom
On-site Permanent

Senior Digital Comms Payload Engineer

This role involves defining digital subsystem architectures for satellite communication payloads, translating system requirements into scalable processing solutions, and leading digital-in-the-loop prototyping. The engineer will assess advanced silicon technologies for space applications, define high-speed interfaces, and support secure hardware integration across space and ground systems. Collaboration spans payload, network, and security domains to deliver resilient, high-performance satellite comms solutions.

Open Cosmos Ltd Didcot, OX11 0RL, United Kingdom
On-site Permanent

Architecte Accès pour constellation - Projet Iris² H/F

Concevoir et garantir l'architecture de la couche accès pour une constellation satellitaire avancée dans le cadre du projet européen IRIS². Travailler sur les systèmes 5G NTN, les communications radio dynamiques et les standards 3GPP, en coordination avec des équipes pluridisciplinaires et des revues client. Participer aux phases de modélisation, spécification et validation en environnement industriel spatial.

Thales Alenia Space France

Délégué RAN4 F/H

This role involves representing Thales in international standardization bodies such as 3GPP, ETSI, and ITU-R, focusing on satellite-based 5G and 6G technologies. The candidate will lead technical contributions, negotiate consensus on Non-Terrestrial Networks (NTN), and align standardization strategy with industrial programmes like IRIS² and LEO-PNT. Responsibilities include preparing technical contributions, analysing industry proposals, patent drafting, and supporting R&D projects such as Horizon Europe 6G-NTN NEXUS.

Thales Alenia Space France
On-site Permanent

Satellite Payload Processing Engineer

Design and build end-to-end processing pipelines to transform raw satellite data into calibrated, orthorectified, and analysis-ready Earth Observation (EO) products. Collaborate with mission engineers, sales, and customers to define product specifications and ensure data usability across multiple payloads. Integrate workflows into scalable, automated systems while supporting payload calibration, validation, and multi-sensor operations.

Open Cosmos Ltd Didcot, OX11 0RL, United Kingdom
On-site Permanent

Senior Spectrum Systems Engineer

This role involves leading spectrum compliance for satellite systems, translating regulations like EPFD and PFD into technical design requirements. The engineer will develop end-to-end simulation models for interference and coexistence, support ITU filings, and guide frequency usage strategies across LEO constellations. Work includes both ground and in-orbit verification, with strong emphasis on regulatory alignment and system-level performance.

Open Cosmos Ltd Didcot, OX11 0RL, United Kingdom
On-site Permanent

Head of Spectrum & Regulatory Affairs

Leads the strategic management and protection of Open Cosmos' global spectrum assets, ensuring compliance with international regulations and coordinating frequency rights across jurisdictions. Translates complex regulatory requirements into technical constraints for satellite operations and represents the company before regulators and industry bodies. Focuses on long-term spectrum planning, ITU filings, and cross-functional collaboration with engineering and mission operations teams.

Open Cosmos Ltd Didcot, OX11 0RL, United Kingdom
On-site Permanent

Sales Lead, Earth Observation Data (Europe)

Lead sales strategy and close strategic deals for Earth Observation data across Europe, targeting government, defence, and commercial sectors. Drive end-to-end sales cycles for satellite data and imagery licensing, working closely with technical and product teams to tailor solutions. Position Open Cosmos’ space-based data capabilities in high-impact customer applications and industry forums.

Open Cosmos Ltd Didcot, OX11 0RL, United Kingdom
On-site Permanent

Data Processing Technical Project Manager

This role involves managing data processing deliverables and products within a satellite data team, coordinating between technical teams and project managers. The focus is on ensuring timely, high-quality delivery using robust software engineering practices. It plays a central role in transforming satellite data into actionable insights for customers and internal platforms.

Open Cosmos Ltd Didcot, OX11 0RL, United Kingdom
On-site Permanent

Verification & Validation Engineer

This role involves ensuring satellite communication systems meet mission-critical requirements through automated testing integrated into agile workflows. The engineer will develop and maintain test frameworks, execute validation in Software- and Hardware-in-the-Loop environments, and collaborate closely with development teams to debug issues and improve system reliability. Focus is on continuous verification of complex, distributed systems using Python and CI/CD pipelines.

Open Cosmos Ltd Didcot, OX11 0RL, United Kingdom
On-site Permanent

Earth Observation Presales Engineer

The Earth Observation Presales Engineer supports customer discovery and solution design by combining satellite imagery, geospatial analytics, and Open Cosmos's platforms. The role involves technical feasibility studies, mission simulations, and customer demonstrations, working closely with business development and engineering teams. It requires strong technical and communication skills to translate customer needs into viable Earth Observation solutions.

Open Cosmos Ltd Didcot, OX11 0RL, United Kingdom
On-site Permanent

Backend Engineer (DataCosmos)

This role involves designing and maintaining scalable backend services and APIs for DataCosmos, a geospatial data platform that processes and delivers satellite data. The engineer will work extensively with Go and Python, cloud-native technologies like Docker and Kubernetes, and contribute to CI/CD and infrastructure improvements. Collaboration with cross-functional teams is key to delivering solutions for real-world space missions.

Open Cosmos Ltd Didcot, OX11 0RL, United Kingdom
Hybrid Permanent

Test Engineer (Data)

A Test Engineer in the Data team ensures the quality and reliability of the DataCosmos geospatial data platform by designing automated and manual tests, validating data flows, and supporting CI/CD pipelines. The role involves testing frontend, API, and data layers while collaborating with engineering and product teams to define test coverage and improve testing practices.

Open Cosmos Ltd Didcot, OX11 0RL, United Kingdom
On-site Permanent

Embedded Systems Engineer

Design and develop real-time embedded software and firmware for satellite communications systems, spanning both space and ground infrastructure. Work on FPGA-based solutions, low-level hardware control, and high-reliability communication protocols in a multidisciplinary engineering environment. Focus on fault tolerance, performance optimisation, and integration across RF, DSP, and embedded systems.

Open Cosmos Ltd Didcot, OX11 0RL, United Kingdom
On-site Permanent

Senior Access Layer Engineer

This role involves designing and optimizing physical and MAC layer functionality for satellite communication systems in low Earth orbit environments. The engineer will develop waveforms, protocols, and link adaptation strategies, build simulation environments using MATLAB or Python, and lead prototyping on SDR platforms. Work includes addressing LEO-specific challenges like Doppler effects, latency, and mobility within 3GPP NTN and DVB-S2X standards.

Open Cosmos Ltd Didcot, OX11 0RL, United Kingdom
On-site Permanent

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