Sponsors

Money Forward is a fintech startup, delivering PFM (personal financial management) service "Money Forward ME" and SaaS accounting software "Money Forward Cloud".
Since its launch in 2012, we aim to solve financial issues of all individuals and businesses through building an open and fair financial platform and providing essential services. Money Forward thrives to be a player that brings innovative ideas and practices to users and financial industry. Money Forward was listed on Tokyo Stock Exchange, Mothers in September 2017.
In return to the power of open source we have benefited since launch of our product, we would like to give back to the environment surrounding Ruby.

Starting with Find Job! in 1997, mixi Group expands the possibilities of communication under a mission of creating new culture with services including Japan's first social network mixi, and the multiplayer smartphone app Monster Strike. The group continues to challenge and develop new markets while enriching the lifestyles of people around the world.

ESM is one of Japan's premier companies building Ruby/Rails applications in an agile way. We believe in Ruby and Agile because we believe in people. We build applications which work well and make customers happy.

We are Ruby specialists developing mainly in-house products (e.g. "Lychee Redmine" plug-ins for OSS “Redmine”, and the original meeting minutes software "GIJI") in a stress-free and flexible environment.
【We Are Hiring Rubyists!】
▶You can focus on programming, no need to do things you don’t want to.
▶Work whenever and wherever you want with outstanding benefits.
(Remote work, full-flex, various benefits including extra ones during COVID-19)
▶Free choice of editor,library and framework.
▶Boss-free, a flat organizational structure. We have a culture of openness and trust.

Ateam is a comprehensive IT company that develops businesses in a variety of technological and business domains based on the internet. We are developing our business in three core segments: "Lifestyle Support Business" which provides comparison sites and information sites closely related to life events and daily life, "Entertainment Business" which provides game and tool applications, and "E-Commerce Business" which operates a specialized online bicycle store.

Speee's mission is "Think and analyze to realize the future quicker". Based on our mission, we solve various issues in the society with technology. We develop our businesses widely in areas such as Marketing Intelligence, Digital Transformation and Healthcare, etc.
While we have been developing our business by combining data and technology, we also have been actively supporting Ruby's development. For example, Ruby committer Kenta Murata is committed to "Red Data Tools", a project for utilizing data in Ruby. He further contributes to activating Open-Source Development with support of Kohei Suto from Clear Code, Inc.
Speee will continue to realize the future quicker by chain of thriving technology and developing businesses.

MedPeer, Inc. is a "HealthTech" company founded by a doctor. We operate MedPeer, one of the largest online community for doctors where 40% doctors in Japan participate. We also provide other healthcare services. Our development language is Ruby, and we actively adopt useful tools. We aim to reinvent healthcare with "collective intelligence" of 125,000 doctors accumulated on our platform and technology.

Studyplus is an EdTech startup company, providing Educational SNS named Studyplus, learning management system SaaS for educational institutions named Studyplus for School, and learning textbook subscription service Porto.
We focus on innovating the educational system to accomplish our mission "Bring the joy of learning to everyone".
Over 6 million users have learned toward each goal through our service.

We are hiring ruby engineers for more service growth.
Feel free to contact us for more info via the recruit page or any way!

◆About the Rakuma development team
With the mission of "Re:valuation - Redefining the value of things", we are working on development as a team of producers, designers and engineers.
Engineers at Rakuma are not just writing codes according to the specifications, but we are dedicated to improve our service always questioning "What are the issues that we should solve for our users?" "What should we do to make more users happier?".
Each member of the development team makes use of his or her own expertise and strives every day to create a better service.

◆Why We Hire
In order for Rakuma to continue to grow, we have been adding a lot of features and systemizing fraud detection, but in parallel, we have been maintaining and improving the existing features, but there are still a lot of things we want to expand and improve.

Fastly helps people stay better connected with the things they love. Fastly’s edge cloud platform enables customers to create great digital experiences quickly, securely, and reliably by processing, serving, and securing applications as close to their end-users as possible at the edge of the internet. Fastly’s platform is designed to take advantage of the modern internet, to be programmable, and to support agile software development with unmatched visibility and minimal latency. Fastly’s customers include Nikkei, Mercari, Cyber Agent, Pinterest, The New York Times, GitHub. Learn more at Fastly.com and follow us on Twitter @FastlyJapan and @fastly.

Supporting creators around the world, pixiv Inc. provides various services which are visited by more than 40 million creators and their fans.

Our mission is "Making your local life smarter and more fun". Tokubai has been grown up since we started the service in 2013 and became one of the largest digital flyer and bargain information services in Japan. More than about 50000 retailers from all over Japan deliver valuable information to the customer through our platform. We support the development of the Ruby community as it continues to enable us to deliver our value to users quickly and safely.

Tabelog is the best way to find restaurants and review them in Japan.
From 2005, we have accumulated over 39 Million Reviews and data for about 800k restaurants. We help "Over 100 Million People" find their best restaurant with scores based on the reviews. Along with our Search Service, we also provide a Booking Service, Credit Card Payment Service and so on. Since 2007, we have been developing Tabelog with Ruby. We're hiring Rubyists! Help us build further splendid service.

Turning encounters into innovation.
Our world is built on encounters; they are the very basis of society. We want to change the way people do business by revealing the potential of every encounter. We aim to foster encounters that will bring about innovation in all areas, and in doing so develop innovative functionality in our products. We will change the way people think about their business encounters, and even change the way those encounters take place.

“Distributors of Wisdom” – We provide online learning service “StudySapuri” in Japan, and “Quipper” in Indonesia and the Philippines.

hey, inc. aim for an economy driven by craftsmanship, passion, and fun with our mission - "Just for Fun".
We enable the merchants to express their passions freely through "STORES Platform" which supports a merchants digital transformation with various solutions; E-commerce, Point-of-Sales, Payments, and Bookings.

We have been developing systems using Ruby on Rails for more than 10 years. We provide a wide range of systems, from financial and public systems to the latest web services and mobile apps for startups.
We are also good at maintaining and operating Rails systems on AWS, and we support the growth of services with DevOps.

We believe entertainment can move people’s hearts.
It expands the world you see and deepens connections between family, friends, and those you have yet to meet.
Entertainment creates experiences that are unforgettable in life.

By being true to our creative and expressive selves and by resonating with artists and creators from around the world,
Akatsuki aims to continue to deliver entertainment that moves people’s hearts.

"mybest" is a service that helps create the best possible selection experience.
We help to match users with goods and services, striving to improve the process of making choices in order to enrich people's lives.
In further pursuit of optimizing users' selection process, we aim to extend our service beyond helping users choose tangible goods and services by assisting users in making various selections that they encounter in their lives, such as experiences and travel destinations.

“coconala” is a skill market for selling and buying knowledge, skills, and experience.
Coconala is a skills matching platform that aims to create a system that allows everyone to pursue their passion.
Buy and sell various services, from “production categories” such as design, website creation, video and music creation and writing, to “business support categories” such as business marketing, as well as “consultation categories” such as career counseling and fashion advices, all for business or in private and in any context. Use “coconala” to exhibit and purchase services, request and provide work proposals, and fulfill a wide range of needs.

Grooves operate a couple of human resource services, representing "Crowd Agent" - a platform that connects recruiting companies and recruitment agencies, and "Forkwell" - a service that empowers software developers' careers.
We aim to evolve working places, and deliver the best human resources to create opportunities to build a better future.

"WOVN.io" is SaaS service that realizes multilingualization of online services like websites, apps, etc. Our mission is to make it possible for people around the world to access all data in their native language.

SMS is a global company whose mission is to create values and contribute to society by providing an "information infrastructure for an aging society." We have developed over 40 services based on infromation technology which are targeting those who are associated with aging society in Japan and Asia Oceania since our founding in 2003.

CrowdWorks provides a freelancing website to people who want to work thorough the internet. We have been developing our service with Ruby on Rails since 2011. We continue to challenge providing works which suit one's lifestyle so that accomplishing our mission "Bring a smile to everyone through work".

Shopify is a global commerce company powering over 1.7 million businesses worldwide, and we love Ruby. It's the foundational technology behind our success. Shopify is built on RoR, and with over 2.8 million lines of Ruby code, we have the oldest and largest Rails codebase in the world powering our core monolith.

Our Ruby Infrastructure Team’s core purpose is to make Ruby fast, scalable, safe, and more enjoyable for Ruby developers globally, while providing the best development platform for Shopify developers. We're committed to the future of Ruby as a language. Learn more about Ruby at scale with Shopify.

Our philosophy is “Pursue the future of consumption”. WED, Inc. is developing businesses related to consumption such as "ONE", a mobile app that enables users to sell their receipts instantly. In 2020, we also released “Zero” with MARUI GROUP. It is an application for shopping malls, and they can manage their tenants’ sales easily. We will optimize consumption with the data from “ONE” and “Zero”.