{"id":3241070,"url":"https://alion.io/job/reorbit-senior-leo-satellite-payload-engineer","title":"Senior LEO Satellite Payload Engineer","company":{"id":56772,"name":"ReOrbit","domain":"reorbit.space","url":"https://alion.io/company/reorbit","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Teamtailor","truth_index":{"grade":"A","score":88,"open_postings":25,"ghost_share":0,"stale_share":0.48,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-11-01T06:10:25Z"}},"role":"Aerospace","role_family":"Aerospace","seniority":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Helsinki, Finland","Bengaluru, India"],"countries":["FI","IN"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":64000,"max_usd":131000,"period":"year","method":"global_role_cell_scaled_by_country","sample_n":298},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"MATLAB","optional":false},{"name":"Python","optional":false},{"name":"Simulink","optional":false}],"status":"live","first_seen_at":"2026-10-08T10:05:41Z","employer_posted_date":"2026-10-08","last_verified_at":"2026-11-01T21:36:59Z","board_verified":true,"closed_at":null,"days_open":24,"trust":{"level":"ok","repost_count":0,"flags":[],"days_open":23},"description":"ReOrbit is looking for a 5G NTN LEO Satellite Payload Engineer to join our team and contribute to the development of next-generation satellite communication payloads supporting 5G New Radio (NR) Non-Terrestrial Network (NTN) services. This is an exciting opportunity to work on innovative satellite communication systems that enable seamless integration between satellite and terrestrial mobile networks, pushing forward the boundaries of space-based connectivity.\nAs our 5G NTN LEO Satellite Payload Engineer, you will contribute to the end-to-end architecture, design, analysis, and validation of communication payloads for Low Earth Orbit (LEO) satellite systems. You will work across 3GPP NTN standards, RF and digital payload design, link budget analysis, waveform and signal processing, system-level performance analysis, and payload verification. We are looking for someone who combines a strong understanding of 5G NR physical-layer technologies with practical satellite communications engineering experience and a system-level perspective. The ideal candidate is analytical, hands-on, and comfortable collaborating across multidisciplinary teams to solve complex engineering challenges.\nIt's an exciting chance to join a dynamic start-up, with the opportunity to make a real impact, to reach our goal of pushing the boundaries of space data transfer. \nThis job can be based in our headquarter in Helsinki, Finland or Bengaluru, India.\nResponsibilities\nDefine and develop communication payload architectures for 5G NR NTN-enabled LEO satellite systems, translating mission and service requirements into payload specifications, performance budgets, and subsystem requirements.\n\nEvaluate transparent (bent-pipe) and regenerative payload architectures, considering their impact on protocol processing, latency, system complexity, and overall performance.\n\nDevelop payload functional architectures covering RF front-ends, frequency conversion, digital processing, channelisation, switching, routing, and antenna subsystems, as applicable.\n\nDefine and analyse payload interfaces with satellite antennas, spacecraft subsystems, ground gateways, and terrestrial 5G network infrastructure.\n\nPerform architecture trade-off studies addressing capacity, coverage, spectral efficiency, power consumption, payload mass, thermal dissipation, and implementation complexity.\n\nApply relevant 3GPP 5G NR NTN specifications, particularly Releases 17 and 18, to payload design and system implementation.\n\nAnalyse NTN-specific requirements and enhancements related to timing advance, frequency compensation, synchronisation, random access, mobility, and radio resource management.\n\nAssess the impact of LEO satellite dynamics, propagation delay, Doppler shifts, and differential Doppler across satellite beams on waveform and protocol performance.\n\nEvaluate NTN operating scenarios across relevant frequency bands, including L-band, S-band, and Ku/Ka-band, depending on the system architecture.\n\nDevelop and analyse RF payload performance requirements, including transmit power, receiver sensitivity, noise figure, gain, linearity, dynamic range, and intermodulation performance.\n\nPerform link budget analysis and assess uplink and downlink performance under realistic LEO operating conditions, taking into account RF impairments, phase noise, frequency errors, power amplifier nonlinearities, interference, and antenna-related losses.\n\nAnalyse digital payload functions such as digital channelisation, beamforming, frequency translation, filtering, switching, and onboard signal processing.\n\nCollaborate with antenna, RF, FPGA, ASIC, digital signal processing, and payload hardware teams to optimise end-to-end performance, multi-beam configurations, frequency reuse, interference management, and system capacity.\n\nDevelop and maintain analytical models and simulation environments for 5G NTN payload and end-to-end system performance, evaluating throughput, spectral efficiency, link availability, latency, coverage, capacity, and link margin.\n\nModel orbital geometry, satellite motion, propagation conditions, Doppler dynamics, and beam footprints to characterise system performance and identify opportunities for optimisation.\n\nConduct system-level trade-off studies to optimise waveform parameters, carrier bandwidth, modulation and coding schemes, beam configurations, and resource allocation.\n\nDefine payload verification plans, test cases, and acceptance criteria based on system and subsystem requirements.\n\nSupport the integration and testing of RF and digital payload hardware, including laboratory testing, hardware-in-the-loop simulation, and end-to-end demonstrations.\n\nValidate payload performance using 5G NR test equipment, channel emulators, software-defined radio (SDR) platforms, and protocol or waveform analysers, as appropriate.\n\nAnalyse test results, identify performance gaps, conduct root-cause analysis, and drive corrective actions to support payload qualification, system integration, and in-orbit performance validation.\n\nWork closely with satellite platform, antenna, RF, modem, ground segment, 5G radio access network (RAN), core network, and systems engineering teams.\n\nPrepare and maintain interface control documents, technical specifications, design reports, and verification documentation, contributing to design reviews, technical risk assessments, and engineering decisions.\n\nCollaborate with external vendors, technology partners, and standards organisations to assess emerging technologies and approaches that can improve payload performance, scalability, reliability, and cost.\n\nSkills and Requirements\nBachelor's or master's degree in Electrical Engineering, Communications Engineering, Telecommunications, Aerospace Engineering, or a related discipline.\n\nRelevant professional experience in satellite communications, wireless systems, RF engineering, digital communications, or communication payload development.\n\nStrong understanding of 5G NR physical-layer concepts, including OFDM, modulation and coding, synchronisation, channel estimation, MIMO, and radio resource allocation.\n\nKnowledge of satellite communication link budgets, RF performance parameters, propagation effects, and end-to-end communication system design.\n\nUnderstanding of LEO satellite operating characteristics, including orbital dynamics, Doppler shifts, propagation delays, and satellite-to-ground geometry.\n\nExperience with system modelling, simulation, and quantitative performance analysis using tools such as MATLAB, Simulink, Python, or equivalent.\n\nAbility to translate high-level service and system requirements into engineering specifications, performance budgets, and verification criteria.\n\nExperience analysing complex technical systems, evaluating design alternatives, and making data-driven engineering decisions.\n\nStrong analytical, problem-solving, communication, and cross-functional collaboration skills.\n\nExperience with 3GPP 5G NR NTN specifications, particularly Release 17 and/or Release 18, is a strong advantage.\n\nHands-on experience designing, analysing, or validating satellite communication payloads for LEO or other non-geostationary satellite systems is an advantage.\n\nExperience with RF payload design, RF front-end characterisation, phased-array antennas, beamforming, or multi-beam satellite architectures is an advantage.\n\nKnowledge of regenerative payloads, onboard digital processing, digital transparent processors, channelisers, or software-defined payloads is beneficial.\n\nExperience with 5G NR protocol stacks, modem implementation, SDR platforms, FPGA-based signal processing, or waveform validation is beneficial.\n\nFamiliarity with NTN channel models, Doppler compensation, timing synchronisation, random access, mobility management, and satellite handover is beneficial.\n\nExperience with RF test equipment, channel emulators, hardware-in-the-loop testing, and end-to-end system validation is beneficial.\n\nFamiliarity with relevant 3GPP, ETSI, ITU, and satellite communication standards and regulatory frameworks is an advantage.\n\nExperience with link-level and system-level simulation, including interference analysis and capacity optimisation, is beneficial.\n\nWhat does ReOrbit do?\nReOrbit builds the foundation for the next generation of space applications by transforming satellites into truly intelligent, interconnected platforms, defined by software. Our satellite design philosophy revolves around the idea that satellites must network, communicate with each other and thus improve mission efficiency. How can this be achieved? Thanks to a flexible software-first architecture, where all these aspects are dealt with upfront in the mission concept, as integrated functionalities.\nReOrbit’s top-notch team of software engineers and system architects develop in-house software, procure hardware from the best-in-class suppliers, and seamlessly integrate the components to create flexible and secure satellites. Today, we are a rapidly growing company building a very strong multidisciplinary team to support our activities. We are headquartered in Helsinki, Finland with a subsidiaries in Bristol, UK, Bariloche, Argentina and Bengaluru, India.\nWorking at ReOrbit\nAt ReOrbit, we are focused on building a strong team as we believe nothing can be accomplished without innovative, humble and curious minds working together on a common goal. We’re all about fostering an inclusive, dynamic environment where equality and diversity are our strength.\nWe offer\nChallenging but rewarding environment - you will thrive if you are always reflecting on how to make things better. Your ideas will be heard.\n\nAmbitious and supportive network of people, who are motivated to change the space industry, bringing expertise from both classic and new space .\n\nBenefits such as lunch vouchers, events, parties, occupational health care and additional health insurance - but most importantly a possibility to be a part of a unique and diverse team, connected by similar mindset and sense of humor.\n\nWe like to spend time together! You can choose activities whichever is to your liking - runOrbit, climbOrbit; become ping pong or board games champion.\n\nWe support relocation and integration into Finnish society.\n\nJoin us in our journey of building software enabled satellites for secure communications\nand, thus, creating the most compelling in space data flow company of the new space era.\nThe Company may require a security clearance for certain positions. Any such security clearance will be conducted in accordance with applicable law and the Company's relevant policies\nFor agencies: We do not accept unsolicited CVs for our open vacancies. Any CV sent to our team unsolicited will reserve us the right to pursue a candidate without obligation to the sender. 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