Masahiro Sakamoto
Manager, Division III at Total Communications System Inc.
Chiyoda, Japan
Summary
🤩
RockstarMasahiro Sakamoto is a seasoned PR leader with 30 years in communications and 25 years focused on the IT sector, currently managing Division III at Total Communications System Inc. He has led high-profile technology and healthcare campaigns for clients including Apple, Adobe, Intel, Microsoft, and major pharmaceutical firms, consistently helping smaller teams punch above their weight against larger agencies. Masahiro’s career blends agency and in-house experience—moving from creative collateral work to embedded PR roles that shaped long-term client relationships and market entries in Japan. Since joining TOCS in 2010 he has strengthened its IT practice, winning B2B and B2C mandates through strategic positioning and media mastery. Surprisingly for a PR veteran, he also contributes to open-source distributed systems projects such as Apache BookKeeper and Pulsar, applying a problem-solving, detail-oriented mindset to backend bug fixes and stability improvements. Based in Chiyoda, Tokyo, he combines deep industry networks with hands-on technical awareness that helps translate complex technology into clear, persuasive narratives.
9 years of coding experience
Github Skills (21)
debugging10
debug10
back-end-development10
distributed-log10
distributed-systems10
websocket10
java10
apache-bookkeeper10
javas10
websockets-client10
websocket-client10
apache-pulsar10
client-websocket10
testing9
authentication9
Programming languages (6)
Github contributions (5)
apache/pulsar
Mar 2017 - Sep 2022
Apache Pulsar - distributed pub-sub messaging system
Role in this project:
Back-end Developer
Back-end DeveloperContributions:62 reviews, 257 commits, 201 PRs in 5 years 6 months
Contributions summary:Masahiro primarily worked on improving the Apache Pulsar message streaming system. They addressed a typo in `ConsumerHandler`, fixed authorization and memory leak issues in the WebSocket proxy, and implemented fixes in the authentication logic. Their contributions also included enabling trusted certificates and implementing several other bug fixes and improvements related to topic stats and key shared subscriptions.
event-streamingpulsarmessaging-systemstreamingapache
apache/bookkeeper
Jul 2019 - Sep 2022
Apache BookKeeper - a scalable, fault tolerant and low latency storage service optimized for append-only workloads
Role in this project:Backend Developer
Backend DeveloperContributions:7 reviews, 8 commits, 9 PRs in 3 years 3 months
Contributions summary:Masahiro primarily contributed to bug fixes and enhancements within the Apache BookKeeper project, which focuses on append-only storage. Their work involved resolving issues related to entry log compaction, specifically preventing its premature stoppage due to exceptions. Additionally, the user addressed issues with the `recover` command in the Bookie shell and added a configuration flag to enable/disable the BookieAddressResolver, thus optimizing the system. They also resolved a critical issue where `checkAllLedgers` could get stuck when read throttling was enabled, enhancing the project's overall stability.
fault-tolerantapache-bookkeeperbookkeeperfaultstorage
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.