Takatoshi Kondo - Software Engineer at OGIS-RI

Takatoshi Kondo

Software Engineer at OGIS-RI

Tokyo, Japan

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Summary

🤩

Rockstar

🎓

Top School

Takatoshi Kondo is a seasoned software engineer based in Tokyo with over 30 years of programming experience and 15+ years of professional development focused on high-performance systems. A long-time ISO C++ committee expert and Boost contributor, he authored and fixed core pieces of Boost.Serialization and Boost.MSM and maintains msgpack-c, demonstrating deep expertise in C++ language design and libraries. In recent years he has become a recognized authority on IoT and MQTT, authoring popular C++ and Rust MQTT implementations (mqtt_cpp, async_mqtt, mqtt-protocol-core, mqtt-endpoint-tokio) that are featured on mqtt.org and widely used in the community. His work blends rigorous multi-paradigm design with practical Sans-I/O and async patterns, bridging low-level protocol correctness with production-ready networking stacks. Beyond code, he contributes to ecosystem tooling (vcpkg, MQTT.js) and supports developers via Stack Overflow, reflecting a commitment to open-source collaboration and long-term maintainability.

15 years of coding experience

10 years of employment as a software developer

Bachelor, Electronics, Bachelor, Electronics at Hiroshima Institute of Technology

Japanese

Stackoverflow

Stats

3,361reputation

120kreached

65answers

46questions

Badges

boost

top-5%

Github Skills (28)

javascript10

c-language10

lib10

mqtt10

cmake10

mqttnet10

state-machine10

vcpkg10

nodejs10

package-manager10

cprogramming-language10

debug9

broker9

debugging9

metaprogramming9

Programming languages (12)

TypeScriptPowerShellJavaC++ShellRustCCMake

Github contributions (5)

mqttjs/MQTT.js

Jul 2017 - Jan 2022

The MQTT client for Node.js and the browser

Role in this project:

Back-end Developer

Contributions:15 reviews, 45 commits, 34 PRs in 4 years 6 months

Contributions summary:Takatoshi's contributions primarily focus on enhancing the functionality of the MQTT client library. They implemented a new function, `removeOutgoingMessage`, and refactored existing code related to message store management, including adding and removing messages from the outgoing store, and changing the logic regarding how callbacks are handled. The user also addressed bug fixes and improvements related to resubscribing to topics upon reconnection, along with adding the ability to control the resubscribe functionality.

browsernode-jsjavascriptmqttnodejs-library

boost-ext/sml

Feb 2017 - Oct 2019

C++14 State Machine library

Role in this project:

Back-end Developer

Contributions:6 commits, 5 PRs, 70 comments in 2 years 8 months

Contributions summary:Takatoshi focused on fixing bugs and improving the `boost-ext/sml` C++14 State Machine library. They addressed issues related to move construction, destructor calls, and deferred event handling. The contributions involved modifying core logic within the state machine implementation, including changes to the `defer_event` structure and event processing mechanisms. They also updated documentation.

smlcppfsm-libraryfsmmetaprogramming

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