KDDI Research, Inc.
6 days ago
Fixed-Term Researcher/Postdoc in Wireless Communications and Mobile Core for Physical AI KDDI Research, Inc. in Japan
Degree Level
Postdoc
Field of study
Computer Science
Funding
Fixed-term contract position with annual income of about 4 million to 9 million yen (listed as 4.2 million yen or more up to 8.5 million yen depending on experience, skills, and achievements). Salary increase and bonus systems are available, and commuting allowance is provided. Employment is contract-based, renewable annually, with a maximum of 5 years for postdocs and 3 years for others; conversion to permanent employment may be possible according to company regulations.
Deadline
Mar 31, 2027
Country
Japan
University
KDDI Research, Inc.

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About this position
KDDI Research, Inc. is recruiting a fixed-term contract researcher for work on wireless communications, mobile core networks, and communication infrastructure for physical AI (including robots and drones). The position is based in Saitama Prefecture, Japan, in the Wireless Division, and focuses on research and development for the 5G/6G era.
The role involves architectural study, design, prototyping, demonstration, and presentation of a next-generation cloud-native mobile core communication platform. The successful candidate will also help define communication requirements for physical AI services and analyze international standardization trends, including 3GPP and related technical specifications. The post is especially relevant to applicants with experience in information networks, wireless access, signal processing, RAN, MIMO, radio propagation, cloud infrastructure, and container technologies such as Kubernetes.
Degree requirement: a PhD or Master's degree in a science or engineering field, together with several years of R&D experience. Required background includes wireless communication, communication networks, communication protocols, signal processing, or related areas. Preferred strengths include standardization work, simulation, device evaluation, technical writing, reading English technical papers/specifications, and communication in English. Experience with AWS/public cloud, virtualization, open innovation, agile development, AI/LLM tools, and reinforcement learning for optimization is also valued.
Funding and employment: this is a fixed-term contract role with an annual salary of approximately 4.0–9.0 million yen (listed as 4.2 million yen or more up to 8.5 million yen depending on experience and achievements). Salary increase, bonus, commuting allowance, and social insurance are provided. The contract is renewable annually, with a maximum term of 5 years for postdocs and 3 years for other roles, and there may be a path to permanent employment under company rules.
Application window: applications are accepted from 2026-09-04 until 2027-03-31, but the search is rolling and may close early once a suitable candidate is selected. Interviews may be conducted online for applicants living overseas or far from Japan.
How to apply: submit an electronic resume with photo, a publication list, and supporting materials showing major research and development achievements. Apply by email to [email protected]. The JREC-IN portal web application is not available.
Funding details
Fixed-term contract position with annual income of about 4 million to 9 million yen (listed as 4.2 million yen or more up to 8.5 million yen depending on experience, skills, and achievements). Salary increase and bonus systems are available, and commuting allowance is provided. Employment is contract-based, renewable annually, with a maximum of 5 years for postdocs and 3 years for others; conversion to permanent employment may be possible according to company regulations.
What's required
Applicants should have a doctoral or master's degree in a science or engineering field and several years of research and development experience. Required experience includes wireless communication, communication networks, communication protocols, signal processing, or related areas, plus interest in physical AI communication infrastructure, 5G/6G wireless communication, and cloud-native mobile core networks. Preferred qualifications include experience in standardization, simulation, device evaluation, reading technical documents and academic papers in English, writing technical documents, understanding 3GPP/IETF specifications, technical English communication (TOEIC around 800 as a guideline), open innovation projects, agile development, AI/LLM tools, 5G/6G, RAN, MIMO, base stations, radio propagation, AWS/public cloud infrastructure, Kubernetes, virtualization platforms, and machine learning or reinforcement learning for RAN.
How to apply
Prepare an electronic resume with photo, education, awards, qualifications, and contact information, plus a list of publications and materials showing major R&D achievements. Apply by email to [email protected]; JREC-IN portal web application is not available. Screening is rolling and may close once a candidate is selected.
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