PNT・測位_GNSS Receiver Evaluation Development Engineer

### ■ Company Overview ArkEdge Space Inc. is a space startup founded in 2018, specializing in the design, manufacturing, and operation of small satellites. We focus on the development of ultra-small satellites, particularly 6U and 50kg-class satellites, as well as the creation of satellite constellations—networks of multiple satellites. In addition, we offer a wide range of services, including the provision of related components and software, as well as the operation of ground stations for satellite control. With the mission of "Empowering people with satellites for a prosperous future," we strive to make space development and utilization accessible to everyone. We are developing ultra-small satellite constellations for various missions, such as Earth observation, maritime satellite communication (satellite VDES), optical communication, and LEO-PNT. Furthermore, we are also supporting humanity's next frontier with satellite infrastructure development for lunar activities and deep-space exploration. By pioneering these initiatives, we contribute to the creation of a new space industry ecosystem beyond Earth. ### ■ Job Overview Drawing on deep expertise in GNSS receiver signal processing and positioning computation, this position is responsible for the evaluation and verification of satellite-borne GNSS receivers. Beyond standalone receiver performance verification, the role places strong emphasis on integrated operation with the timekeeping control system and interface validation, ensuring that the payload system functions correctly as a whole. By leading the interface design and coordination between externally procured GNSS receivers and the system, you will contribute directly to satellite orbit and time determination — the core technology underpinning LEO-PNT (Low Earth Orbit Positioning, Navigation, and Timing) and LNSS (Lunar Navigation Satellite System). You will also take part in the in-house development of receivers for LEO-PNT and LNSS ground user terminals. ### ■ Specific Responsibilities - Define technical requirements and develop specifications for satellite-borne GNSS receivers; communicate requirements to and coordinate technically with external contractors - Evaluate receiver characteristics for multi-constellation and multi-frequency support (GPS, Galileo, QZSS, etc.) - Assess quality of receiver observables (pseudorange, carrier phase, Doppler) and analyze error characteristics (C/N0, multipath, cycle slip, etc.) - Design and conduct GNSS receiver performance evaluation and functional verification using GNSS simulators - Design and define interfaces between GNSS receivers and the timekeeping control system; conduct integration testing - Provide technical feedback to the orbit and time determination team based on receiver evaluation results - In-house development of receivers for LEO-PNT and LNSS ground user terminals, including signal processing algorithm design and software-defined receiver implementation ### ■ Role Opportunities - Play a key role at the intersection of GNSS receiver evaluation and system integration in LEO-PNT and LNSS — among the world's first in the private sector - Career breadth beyond standalone receiver evaluation, with upstream involvement in interface design with timekeeping control systems and orbit/time determination - The rare opportunity to develop ground user terminal receivers for LEO-PNT and LNSS in-house — an experience that exists almost nowhere else in the private sector worldwide - Sharpen GNSS receiver expertise in the harsh space environment - Opportunities to collaborate with government and international partners including JAXA, NASA, and ESA - Opportunities to participate in and present at international conferences and to publish research ### ■ Team & Culture We foster an open and collaborative culture in which team members are encouraged to ask questions, share ideas, and constructively challenge established approaches, regardless of seniority or title. Our engineers come from both the space-sector and other technical backgrounds. We value the specialist knowledge of experienced space professionals alongside the fresh perspectives and transferable skills brought by people entering the industry. This diversity helps us respect proven experience while continuing to question conventional wisdom. Approximately 10% of our employees are international, and some meetings and activities are conducted in English. We also use translation and communication tools to support collaboration across languages. As much of our technical work and wider company communication takes place in Japanese, international team members should be willing to learn Japanese and make an active effort to communicate across language barriers. At the same time, we continually work to include non-native speakers and encourage all employees to contribute to broader discussions about diversity, inclusion, and how we can improve our workplace culture. ### ■ Tools Used - OS: Windows, Linux - GNSS simulators - RF measurement instruments including spectrum analyzers and signal generators - Signal analysis and orbit computation using Python/MATLAB, etc. - Code management: GitHub - Task management: GitHub Projects V2 / GitHub Issues - Version control: Git - PC: Provided based on personal preference ### ■ Selection Process Document Screening ＞ First Interview ＞ Second Interview (Aptitude Test) ＞ Final Interview 必須スキル ### ■ Company Overview ArkEdge Space Inc. is a space startup founded in 2018, specializing in the design, manufacturing, and operation of small satellites. We focus on the development of ultra-small satellites, particularly 6U and 50kg-class satellites, as well as the creation of satellite constellations—networks of multiple satellites. In addition, we offer a wide range of services, including the provision of related components and software, as well as the operation of ground stations for satellite control. With the mission of "Empowering people with satellites for a prosperous future," we strive to make space development and utilization accessible to everyone. We are developing ultra-small satellite constellations for various missions, such as Earth observation, maritime satellite communication (satellite VDES), optical communication, and LEO-PNT. Furthermore, we are also supporting humanity's next frontier with satellite infrastructure development for lunar activities and deep-space exploration. By pioneering these initiatives, we contribute to the creation of a new space industry ecosystem beyond Earth. ### ■ Job Overview Drawing on deep expertise in GNSS receiver signal processing and positioning computation, this position is responsible for the evaluation and verification of satellite-borne GNSS receivers. Beyond standalone receiver performance verification, the role places strong emphasis on integrated operation with the timekeeping control system and interface validation, ensuring that the payload system functions correctly as a whole. By leading the interface design and coordination between externally procured GNSS receivers and the system, you will contribute directly to satellite orbit and time determination — the core technology underpinning LEO-PNT (Low Earth Orbit Positioning, Navigation, and Timing) and LNSS (Lunar Navigation Satellite System). You will also take part in the in-house development of receivers for LEO-PNT and LNSS ground user terminals. ### ■ Specific Responsibilities - Define technical requirements and develop specifications for satellite-borne GNSS receivers; communicate requirements to and coordinate technically with external contractors - Evaluate receiver characteristics for multi-constellation and multi-frequency support (GPS, Galileo, QZSS, etc.) - Assess quality of receiver observables (pseudorange, carrier phase, Doppler) and analyze error characteristics (C/N0, multipath, cycle slip, etc.) - Design and conduct GNSS receiver performance evaluation and functional verification using GNSS simulators - Design and define interfaces between GNSS receivers and the timekeeping control system; conduct integration testing - Provide technical feedback to the orbit and time determination team based on receiver evaluation results - In-house development of receivers for LEO-PNT and LNSS ground user terminals, including signal processing algorithm design and software-defined receiver implementation ### ■ Role Opportunities - Play a key role at the intersection of GNSS receiver evaluation and system integration in LEO-PNT and LNSS — among the world's first in the private sector - Career breadth beyond standalone receiver evaluation, with upstream involvement in interface design with timekeeping control systems and orbit/time determination - The rare opportunity to develop ground user terminal receivers for LEO-PNT and LNSS in-house — an experience that exists almost nowhere else in the private sector worldwide - Sharpen GNSS receiver expertise in the harsh space environment - Opportunities to collaborate with government and international partners including JAXA, NASA, and ESA - Opportunities to participate in and present at international conferences and to publish research ### ■ Team & Culture We foster an open and collaborative culture in which team members are encouraged to ask questions, share ideas, and constructively challenge established approaches, regardless of seniority or title. Our engineers come from both the space-sector and other technical backgrounds. We value the specialist knowledge of experienced space professionals alongside the fresh perspectives and transferable skills brought by people entering the industry. This diversity helps us respect proven experience while continuing to question conventional wisdom. Approximately 10% of our employees are international, and some meetings and activities are conducted in English. We also use translation and communication tools to support collaboration across languages. As much of our technical work and wider company communication takes place in Japanese, international team members should be willing to learn Japanese and make an active effort to communicate across language barriers. At the same time, we continually work to include non-native speakers and encourage all employees to contribute to broader discussions about diversity, inclusion, and how we can improve our workplace culture. ### ■ Tools Used - OS: Windows, Linux - GNSS simulators - RF measurement instruments including spectrum analyzers and signal generators - Signal analysis and orbit computation using Python/MATLAB, etc. - Code management: GitHub - Task management: GitHub Projects V2 / GitHub Issues - Version control: Git - PC: Provided based on personal preference ### ■ Selection Process Document Screening ＞ First Interview ＞ Second Interview (Aptitude Test) ＞ Final Interview 歓迎スキル - Experience implementing or evaluating high-accuracy positioning techniques (PPP, RTK, DGNSS, etc.) - Knowledge of orbit and time determination algorithms (state estimation theory such as Kalman filters) - Experience designing or developing time synchronization and timekeeping control applications using GNSS receivers - Experience evaluating receivers using GNSS simulators - Experience implementing receiver signal processing using software-defined radio (SDR) or FPGA - Experience developing or evaluating space-borne equipment (space environment compatibility) - Experience preparing technical documents in English or conducting technical negotiations with external contractors - Willingness to work in a Japanese-language environment for technical documentation and communication 求める人物像 - Integrated technical understanding from GNSS receiver signal processing through to positioning computation, with the ability to translate evaluation insights into system improvements - Ability to proactively drive technical coordination with external contractors and translate specifications into concrete deliverables - Ability to independently identify technical issues between the receiver and the system, and resolve them in collaboration with relevant teams 応募概要 給与 Annual salary: 6 million to 12 million JPY ※ Determined based on skills, experience, and depth of expertise (junior to architect). ※ Overtime pay will be provided separately. 勤務地 Ariake Office (Koto-ku, Tokyo) ※Primarily office-based, with partial remote work available. ※Smoking prohibited in all indoor areas (measures against passive smoking). 【Scope of change in place of work】 (Upon joining) The above location (Subject to change) The above location and locations determined by the company (including places where telework is performed) 雇用形態 Employment Type: Full-time Employee 勤務体系 Flexible Working Hours ※ Prescribed Working Hours: 8 hours/day (60-minute break) ※ Typical Working Hours: 9:00 AM – 6:00 PM ※ Primarily office-based, with partial remote work available. 試用期間 Probation Period: 3 months (No changes to employment conditions during this period) 福利厚生 【Holidays & Leave】 - Annual Days Off: 120 days - Full two-day weekends (Saturday & Sunday), public holidays - Summer leave: 3 days, Year-end/New Year leave: 5 days - Other leave (e.g., bereavement leave, paid leave as per company policy) 【Paid Leave】 - 10 days granted after 1 month of employment - Maximum accrual: 20 days 【Allowances】 - Housing allowance (support for those relocating alone or from overseas; up to 35,000 JPY/month) - Full coverage of transportation expenses 【Benefits】 - Full social insurance coverage (employment insurance, workers' compensation insurance, health insurance, employee pension) - Corporate defined-contribution pension plan - Employee stock ownership plan - Language-learning support (up to approximately 100,000 JPY) - Regular health check-ups - Influenza vaccination subsidy - Online medical consultation - Casual dress code - Lunch subsidies (Tamago-ya, OFFICE DE YASAI) - Vending machine subsidies - Free water and coffee dispensers - Team-building support program - Meal subsidy for recruitment meetings, etc.