Hiroshi Yokoi - Senior Manager at NTT

Hiroshi Yokoi

Senior Manager at NTT

Yokohama, Japan

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Summary

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Rockstar

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Top School

Hiroshi Yokoi is a Senior Manager at NTT with 13 years of software engineering experience specializing in network systems and BGP implementations. He progressed through technical and leadership roles at NTT affiliates, moving from hands-on software engineering to project management and now senior leadership in Yokohama. Hiroshi has made notable open-source contributions to prominent SDN and BGP projects (Ryu and GoBGP), improving BGP capabilities, VPNv6/VRF support, YANG data generation, and protocol parsing. His background blends deep protocol-level back-end expertise with practical product delivery and team leadership across large telecom environments. Colleagues describe him as a pragmatic engineer-manager who surfaces subtle protocol edge cases into robust, production-ready solutions.

13 years of coding experience

20 years of employment as a software developer

Ritsumeikan University

English, Japanese

Github Skills (11)

bgp10

go10

yang10

python10

networking10

network-programming10

sdn10

ryu10

ipv69

vpn9

network-configuration9

Programming languages (4)

C++CGoPython

Github contributions (5)

osrg/gobgp

Nov 2014 - Dec 2016

BGP implemented in the Go Programming Language

Role in this project:

Back-end Developer

Contributions:147 commits, 87 PRs, 55 pushes in 2 years 1 month

Contributions summary:Hiroshi contributed to the development of the BGP implementation in the Go Programming Language. Their work included adding pyang plugins and YANG files to generate data structures for configuration. The user also enhanced the code to support typedef and identity, and they addressed PEP8 warnings in the code. Furthermore, they added a function to the AsPathParamInterface and its structs.

golangprogramming-languagebgpsdn

faucetsdn/ryu

May 2013 - Oct 2014

Ryu component-based software defined networking framework

Role in this project:

Back-end Developer

Contributions:22 commits in 1 year 4 months

Contributions summary:Hiroshi primarily contributed to the Ryu SDN framework, specifically focusing on the BGP (Border Gateway Protocol) implementation. Their work included adding an out-filter function to the Ryu BGPSpeaker, fixing the way of getting the RouteFamily object, and fixing the logic for checking BGP capabilities. The user also added MED (Multi-Exit Discriminator) parameter to neighbor_add, updated neighbor configurations, and added support for VPNv6 VRF and prefix management. These contributions enhanced the BGP functionalities within the SDN framework.

component-baseddefinednetworkingsoftware-defined-networkingnetwork

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