Resume

Kesklinn, Tallinn, Estonia
phone: +372-5919-2420
email: [email protected]
skype: [email protected]
website: https://maaash.jp/

Interests 見出しへのリンク

I’m interested in:

  • Sustainability
  • Identity and strong authentication
  • Devices that connect to Internet and smartphones

Work Experience 見出しへのリンク

CTO, Okaeri, Inc. Nov 2020 - Current 見出しへのリンク

  • BambooRoll https://bambooroll.jp/

    BambooRoll is a toilet paper subscription service.
    Bamboo is the fastest growing plant and we currently source sustainably in China.

    We’re in the process of developing partners in Japan to source bamboo and manufacture toilet paper in Japan, to solve the bamboo pollution problem in Japan.

    I take care of communication with manufacturing partners and running the E-commerce shop built on top of Shopify.

CTO, Planetway OÜ, Dec 2017 - Current 見出しへのリンク

CTO and Co-Founder, Nature, Inc., Dec 2015 - Currently Technical Advisor 見出しへのリンク

  • Nature Remo https://www.kickstarter.com/projects/926103613/nature-remo-make-any-room-air-conditioner-smart/description

    Nature Remo is a Wi-Fi connected device that transforms any air conditioner into a smart air conditioner.
    Nature Remo utilizes infrared to control air conditioners and has many sensors to understand the room environment, integrates with IFTTT and voice assistants like Amazon Alexa, to provide features like: “Automatically turn off air conditioner when away”, “Pre-cool before arriving home”, “Control home appliances through voice” and so on.

    I lead a small team of electronics, mechanics and software engineers, communicating with contract manufacturers and we just finished shipping the 1st 2000 units to our kickstarter, indiegogo, makuake backers (2017-06).

    Skills: Go, Swift, C, JavaScript, circuit design, board design, 3D modeling.

Freelance Engineer, Oct 2013 - Current 見出しへのリンク

  • BOCCO http://bocco.me/index_en.html

    BOCCO is a Wi-Fi connected voice messenger device + BLE sensor hub for families.
    Kids in the house use BOCCO to hear and record voice messages, and (grand) parents record voice or send text messages with text-to-speech on their iPhone/Android phones to reply back.

    I designed the communication sequence between BOCCO/iPhone/Server, built the iPhone app (https://itunes.apple.com/app/bocco/id961851448?mt=8) in Swift and API server in Golang.
    Interesting part was to design the setup sequence. BOCCO needs to connect to home Wi-Fi network. We used BLE to pass Wi-Fi credentials from iPhone to BOCCO, and to monitor BOCCO’s Wi-Fi connection status.
    I enjoy being a member of a small team, talking with the firmware team, making complicated technical things appear simple by automatically making reasonable decisions and limiting customers options.

    Skills: Swift, Go, Heroku, MySQL, Redis, BLE.

  • IRKit http://getirkit.com/en/

    This is my personal project.
    IRKit is an opensource, Wi-Fi enabled infrared remote controller device (https://github.com/irkit/device) .
    IRKit connects to home Wi-Fi network and becomes a web server itself, and longpolls server on Internet.
    Any Wi-Fi or Internet connected device can send IR signals through IRKit.

    I designed the electronics on Eagle, firmware in C, 3D model of the case using Rhinocerous.
    I talked with contract manufacturers and started selling this on Amazon (http://www.amazon.co.jp/gp/product/B00H91KK26), sold 10k units.
    Also built it’s iOS app “IRKit Simple Remote” (https://itunes.apple.com/us/app/irkit-simple-remote/id778790928?l=ja&ls=1&mt=8),
    and iOS SDK (https://github.com/irkit/ios-sdk) to support developers easily build iOS applications to control home electronics using IRKit.
    Skills: C, Objective-C, JavaScript, circuit design, board design, 3D modeling.

Engineer, KAYAC Inc, Nov 2006 - Sep 2013 見出しへのリンク

Belonged to lab team to create new web services or smartphone applications.
Mostly worked in a team of 2,3 people and lead the project while developing both client (iOS app or browser JavaScript) and API server.

  • Lobi http://lobi.co/

    Lead, designed, implemented, maintained a realtime chat system’s API server, iOS client and SDK.
    +100,000 daily active users.

    Interesting sub projects:

    • Recommend engine using Redis Sets and Lua scripting
    • High performance image resizing server using Node.js and ImageMagick C++ API

    Skills: Node.JS, Objective-C, Perl, C++, Lua, MySQL, Redis, Chef, AWS, Linux, Fluentd

  • jsdo.it http://jsdo.it/ , wonderfl.net http://wonderfl.net/

    Lead, designed, implemented an online community for frontend engineers.
    jsdo.it is for JavaScript, HTML5 and CSS engineers,
    wonderfl.net is for ActionScript3 (Adobe Flash) engineers.
    You can write code in browser, see result content (compile ActionScript3 to Flash in wonderfl.net),
    see code popularity ranking, follow users, favorite code.

    Interesting sub projects:

    • Distributed ActionScript3 compiler servers

    Skills: JavaScript, Perl, ActionScript3, MySQL, Memcached, AWS, Linux

Engineer, Panasonic Corporation, Apr 2000 - Oct 2006 見出しへのリンク

  • Location systems in Car navigation system

    Designed, implemented features to improve location accuracy using gyroscope, 3-axis G-sensor, vehicle speed pulse, GPS and map matching.

    Interesting sub projects:

    • Presumption of the driver steering wheel action by gyroscope data, to calculate car location inside underground parking places, where GPS goes off and demanded accuracy levels high.

    Skills: C, C++

Education 見出しへのリンク

Bachelor of Engineering, Department of System Design, Faculty of Science and Technology, Keio Univerity, Japan 2000
Concentration: Image processing for environment recognition
Kazuo Nakazawa Lab.

Foreign Language Skills 見出しへのリンク

English: TOEIC score 900 (2005)

Open Source Contributions 見出しへのリンク

See https://github.com/mash

Computer Skills 見出しへのリンク

Languages: C, C++, Golang, Node.JS, JavaScript, Objective-C, Perl
Databases,Middlewares,Tools: MySQL, Redis, Memcached, Nginx, Fluentd, Chef
Platforms: iOS, Linux, AWS