From major achievements
Information security
IC card mutual authentication software, issuing system (basic design, implementation, test)
Cryptocurrency system (Ethereum), PKC application (R&D, security LSI, NIST test)
Infrastructure
EC server (CentOS6, 7, On-Premise/AWS) tuning (kernel/DB/Web), construction, operation
Electronic money high-speed payment server
IoT
Linux kernel, device driver, Android system, data logger (software development, testing, delivery)
IC card control
Target board: Raspberry Pi Series, BeagleBone Black, Armadillo etc
Hardware development (all are accepted in successful commercialized big hit products)
Voice control microcomputer
IC card dedicated LSI
Computer Science
Cryptographic mathematics research
Neural network application
Digital information processing (noise canceller, near field communication technology, hardware), LSI development
Academic societies, communities, standardization activities
ISO standardization (next-generation communication technology)
Reviewer on International Journals, Research expert, International conference presentation attendant (IEEE, IEICE, IACR, ASA, Linux Foundation etc)
patent application
many