Masashi Umezawa

Interest

Computer Skills

• Programming Language: Smalltalk, Java, JavaScript, TypeScript, Swift, Objective-C, C++, C#, C, Groovy, Lua
• Web Application Development: Seaside, OpenResty, Caddy, SvelteKit, VueJS, jQuery, LESS, SCSS, webpack
• Database: PostgreSQL, Oracle, Objectivity (OODB), GemStone/S, Firebase Cloud Firestore, Neo4j, MongoDB
• Distributed Computing: REST, CORBA, SOAP
• Middleware: Redis, Kafka, Tarantool, Vert.x
• Authentication: JWT, Firebase Authentication, Keycloak
• Search Engine: Solr, Elasticsearch
• Cloud Platform: AWS, Google Cloud, Firebase
• Infrastructure: Docker, Kubernetes
• Modeling: UML, Booch
• Development Process: XP, RUP, Kanban, Scrum

Work Experience

Owner, CTO, SoftUmeYa, LLC, April 2008 - current

• Customizable Wiki system (Scallion)
• Web-based rental equipment maintenance scheduling system
• Web-based global auction system for used machines
• Web-based global marketplace for used machines (Allstocker)
• Scrach clone for iPad (Pyonkee)
• Croquet-based 3D collaboration platform
• Web-based learning tool (connected with ontology)
• OSPF/CSPF routing simulator
• LSP discovery tool
• Demo platform of car cockpit interface

Executive, Consultant, Chief developer, Blue Plane (Freelance), August 2005 - April 2008

• Rule-engine based task scheduling tool
• Ontology modeling tool
• Sharable desktop prototyping
• Event persistence framework
• Collaborative Web UI and browser plugin
• Home computing OS prototyping
• Blog system consultation and prototyping

Software architect, Development process consultant, Mamezou Inc., July 2005 - July 2004

• Agile development process consultation

Coach, Cheif developer, IPA exploratory software project., July 2002 - July 2004

• SeeThroughTalk
• NetMorph

Coach, Cheif developer, Mamezou Inc., July 2001 - February 2002

• Embedded OS prototyping
• Review of Design and Documentation of an embedded ORB

Software architect, Development process consultant, Osaka Gas Information System Research Institute (OGIS), July 1997 - June 2001

• Dynamic UI for a car navigation systems
• Case tool and code generator development for an embedded ORB
• Design and Implementation of embedded ORB
• Design and process consultation of life insurance web services
• Design and process consultation of product order web services
• System architecture design of java based distributed control systems
• Developing a portable benchmark suite for CORBA

Product support, Product developer, Trainer, Courseware-developer, Osaka Gas Information System Research Institute, April 1994 - June 1997

• Courseware development of Java and distributed computing
• Courseware development of Smalltalk and object-oriented programming
• Product support of VisiBroker ORB (CORBA)
• Product support of VisualWorks (Smalltalk)
• Development of Rose/Smalltalk (OO-CASE) Japanese edition
• I18N of Objectivity/Smalltalk database (OODB)
• I18N of Distributed Smalltalk (CORBA)

Education

• Kyoto University, American Literature, 1994

Publications

• Interacting with Neo4j from Pharo Smalltalk, 2021
• Evolving ALLSTOCKER, ESUG, 2019
• Jiyuu Jizai Squeak Programming (in Japanese) The first comprehensive Squeak programming book in Japanese, Soft Research Center, 2004
• NetMorph - an intuitive mobile object system Design and implementation of NetMorph, C5 conference, 2003
• Happy Squeaking!! (in Japanese) Webzine of Squeak and object-oriented programming, OGIS-RI ObjectSquare, 1998-1999
• Articles on Qiita

Honors

• IPA Explaratory Software Project FY2003 Super Creator

Free software (selected)

• RediStick (Fault-torelant Redis client for Pharo)
• SCypher (An extensible, dynamic Cypher query builder)
• SCypherGraph (High-level object wrapper of Neo4j graph database)
• Pyonkee (Scratch clone for iPad)
• Tarantalk (Tarantool client for Pharo)
• Mustaside (An extension of Seaside rendering engine for supporting Mustache template)
• MessagePack for Smalltalk (MessagePack serialization library for various Smalltalk dialects)
• StOMP (High-level serialization library based on MessagePack for Smalltalk)
• FileMan (Simpler file API for various Smalltalk dialects)
• Dandelion (Smalltalk analysis/output framework)
• SmallInterfaces Squeak Port (Interface support for Smalltalk)
• SoapOpera (SOAP 1.1 implementation and lightweight ORB wrapper for SOAP)
• SIXX (Portable Smalltalk XML serializer/deserializer)
• NetMorph (an intuitive mobile object system - 2002 IPA Exploratory Software Project)
• SeeThroughTalk (a multi-layeded highly interactive programming environment - 2003 IPA Exploratory Software Project)
• SqSquare (Broad, virtual sharable desktop for internet)
• SuperSwiki2 (SuperSwiki clone on Seaside)
• squeak-ja (Japanese localized/patched version of Squeak)
• GitHub repositories
• Others

Other achievements

Presentations

• Slideshre presentations
• ObjectDay panel discussions

Translations

• Refactoring: 2nd Edition (Co-translation), 2019
• Pharo by Example (Co-translation), 2013
• Refactoring Databases (Co-translation), 2007
• Squeak: Open Personal Computing and Multimedia (Co-translation), 2003
• Smalltalk Best Practice Patterns (Co-translation), 2003
• Refactoring: Improving the Design of Existing Code(Co-translation), 2000
• The Art and Science of Smalltalk (Co-translation), 1996

Meetup

• Smalltalk-users.jp (2008 - current)

Foreign language Skills

• English: TOEIC score 910 (2001)