KDDI Research, Inc.
6 days ago
Fixed-Term Researcher/Postdoc in Wireless Communications, AI for RAN, and Communication Infrastructure KDDI Research, Inc. in Japan
Degree Level
Postdoc
Field of study
Computer Science
Funding
Contract employee 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 company regulations, experience, skills, and achievements). Salary increase and bonus systems are available, and commuting allowance is provided. This is a fixed-term role with annual renewal; maximum 5 years for postdocs and maximum 3 years for others, with a regular employee conversion system available 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 / postdoc-equivalent in wireless communications, with a focus on AI for RAN, mathematical optimization, and the development of communication infrastructure for physical AI (including robots and drones).
The role is based in the Wireless Division and involves end-to-end R&D: from research and demonstration to application in commercial networks, technical consulting, AI model implementation and tuning support, and analysis of standardization trends such as 3GPP and O-RAN Alliance.
Applicants should have a PhD or Master’s degree in science or engineering plus several years of R&D experience. Required background includes wireless communication, communication networks, communication protocols, or signal processing. Strong Japanese communication skills are required. Preferred experience includes English technical reading/writing, standardization, simulation, equipment evaluation, AI/LLM-based development, machine learning, reinforcement learning, and cloud infrastructure such as AWS.
This is a contract employee position with an annual salary of roughly 4.0–9.0 million yen (company-regulated, experience-dependent), plus bonus, salary increase, and commuting allowance. The contract is renewable annually, with a maximum of 5 years for postdoc-equivalent roles. Interviews may be conducted online for applicants living overseas or far away in Japan.
Work location: Fujimino City, Saitama Prefecture, Japan. Deadline: applications must arrive by 2027-03-31, and screening begins as soon as applications are received.
Funding details
Contract employee 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 company regulations, experience, skills, and achievements). Salary increase and bonus systems are available, and commuting allowance is provided. This is a fixed-term role with annual renewal; maximum 5 years for postdocs and maximum 3 years for others, with a regular employee conversion system available according to company regulations.
What's required
A PhD or Master's degree in a science or engineering field and several years of research and development experience are required. Applicants should have R&D experience in wireless communication, communication networks, communication protocols, signal processing, or related areas, and be interested in learning about physical AI communication infrastructure, 5G/6G wireless communication, and cloud-native mobile core networks. Fluent Japanese speaking, reading, and writing skills are required. Preferred qualifications include the ability to read and write technical documents in English, experience with standardization, simulation, and equipment evaluation, familiarity with 3GPP and IETF specifications, technical communication skills in English (TOEIC around 800 as a guideline), experience in open innovation and agile development, AI/LLM-based R&D, mathematical optimization and machine learning, reinforcement learning, and public cloud infrastructure such as AWS.
How to apply
Prepare an electronic resume with photo, education, awards, qualifications, and contact information, plus a publication list and materials showing major R&D achievements. Apply by email to [email protected]; JREC-IN portal web application is not available. Applications are reviewed on a rolling basis until the position is filled.
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