Job Overview

why should you choose us?

rakuten symphony is reimagining telecom, changing supply chain norms and disrupting outmoded thinking that threatens the industry's pursuit of rapid innovation and growth. based on proven modern infrastructure practices, its open interface platforms make it possible to launch and operate advanced mobile services in a fraction of the time and cost of conventional approaches, with no compromise to network quality or security. rakuten symphony has operations in japan, the united states, singapore, india, south korea, europe, and the middle east africa region. for more information, visit:

building on the technology rakuten used to launch japan's newest mobile network, we are taking our mobile offering global.

to support our ambitions to provide an innovative cloud-native telco platform for our customers, rakuten symphony is looking to recruit and develop top talent from around the globe. we are looking for individuals to join our team across all functional areas of our business - from sales to engineering, support functions to product development.

let's build the future of mobile telecommunications together!

about rakuten rakuten group, inc. (tse: 4755) is a global leader in internet services that empower individuals, communities, businesses and society. founded in tokyo in 1997 as an online marketplace, rakuten has expanded to offer services in e-commerce, fintech, digital content and communications to approximately 1.5 billion members around the world. the rakuten group has over 27,000 employees, and operations in 30 countries and regions. for more information visit

principle responsibilities:

• conduct in-depth security research on various aspects of o-ran and 3gpp networks, including but not limited to:
• quantum computing / post quantum cryptography
• qkd (quantum key distribution)
• ai/ml model security
• agentic ai
• blockchain for telco
• key management and cryptographic protocols
• air interface security
• security of virtualized network functions
• proven track record of research and publications in reputable security journals
• preferably experience in security standards research
• collaborate with other researchers and engineers to integrate security solutions into existing and emerging o-ran/3gpp architectures.
• publish research findings in peer-reviewed journals, conferences, and technical reports.
• present research results at industry conferences and workshops.
• stay up-to-date with the latest security threats, vulnerabilities, and mitigation techniques in the mobile network domain.
• contribute to the development of security standards and best practices for o-ran and 3gpp systems.
• produce clear and concise technical documentation of research findings and implemented solutions.