Sponsors

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.

Helpfeel Inc. was founded in Silicon Valley in 2007. In 2019 released Helpfeel, an enterprise search SaaS that provides FAQ search and knowledge discovery for end users and internal teams. In November 2023, raised 20 billion yen to expand Helpfeel. Helpfeel has offices in Kyoto and Tokyo while also offering full remote work and flexible hours.

ANDPAD is Japan's largest cloud-based construction management platform that enables centralized management, from enhancing on-site efficiency to driving overall business improvement. With its intuitive and user-friendly UI, ANDPAD is relied upon by over 187,000 companies. Our platform serves more than 475,000 professionals in the construction and building industry. We are dedicated to using technology to achieve digital transformation in the construction industry, driving societal change along the way.

Leaner Technologies Inc. develops and provides "Leaner", a cloud service for procurement departments.
Our mission is raising the corporate value of all Japanese companies by digitalizing the corporate purchasing process.
Currently, "Leaner" services are being used by about 6,000 companies to accelerate the digitalization of their purchasing operations.

Supporting creators around the world, pixiv Inc. provides various services which are visited by more than 80 million creators and their fans.

SmartBank provides B/43, a Visa prepaid card designed for finance management. With our B/43 Pair Card, couples can share an account, making budget management effortless.

Our finance service extensively uses Ruby and Rails as its foundation, supporting transactions over several billion yen every month. We strive to prove Ruby is capable of building such a scalable and robust Fintech system.

Cookpad provides a global platform for recipe sharing and search, used in 70 countries and regions, in 28 languages. Our mission is to make everyday cooking fun, because we see a brighter future. And we believe that the power of cooking will get us there. Cooking isn’t just a matter of putting together ingredients. When you cook, you choose. You choose what to buy, what to eat, and how to nourish yourself, your family, and friends. You choose how to give back to communities. When you cook, you choose to become a maker of tomorrow’s world. Here at Cookpad, each day is about inspiring more people to make these choices.

SmartHR is the number one rated HR cloud based software optimized for labor management. Our software not only focuses on employee management and administration, but also growth and productivity. Customers can accelerate digital transformation of HR manual processes including year-end-tax adjustments, employment contracts, new employee registrations, issuing payslips, employee data management, and more. Furthermore, providing talent management functionalities contributes to improve employee productivity and engagement. For this reason, SmartHR is among the leading progressive cloud-based HR solutions enhancing the growth of companies in Japan.
As a big fan of the Ruby language, we're excited to be a sponsor of this Kaigi.

Findy helps engineering organizations and individuals improve their development experiences. Founded in 2016 and based in Tokyo, the Engineering Intelligence products, Findy, Findy Freelance, Findy Global, and Findy Team+ are trusted by over 120,000 software engineers users and over 1,000 companies from start-ups to enterprises.

Money Forward is a SaaS/fintech company, providing PFM (personal financial management) service “Money Forward ME” and back office SaaS “Money Forward Cloud”.
Since the company's establishment in 2012, our aim has been to solve financial issues of all individuals and businesses through building an open and fair financial platform, thriving to be a player that brings innovative ideas and practices to all users.

ZOZO, Inc. owns and operates ZOZOTOWN, Japan’s largest fashion e-commerce. Housed within ZOZOTOWN are category specialized malls such as ZOZOCOSME and ZOZOSHOES; ZOZOUSED, a second-hand clothing fashion mall; ZOZOVILLA, a section dedicated to luxury & designer brands; YOUR BRAND PROJECT; a D2C business that provides consumers an opportunity to share their sense of style and fashion by creating their own personal fashion brand; WEAR, a SNS for sharing stylings and outfits, and more - various services for fashion lovers. ZOZO has also developed technology devices for body measurement, such as the ZOZOSUIT, ZOZOMAT, and ZOZOGLASS.

Fastly is upgrading the internet experience to give people and organizations more control, faster content, and more dynamic applications. By combining the world’s fastest global edge cloud network with powerful software, Fastly helps customers develop, deliver, and secure modern distributed applications and compelling digital experiences. Fastly’s customers include many of the world’s most prominent companies, including Pinterest, The New York Times, and GitHub. For more information on our mission and products, visit https://www.fastly.com.

DeNA (pronounced "D-N-A") aims to entertain and to serve through our businesses, under our mission to delight people beyond their wildest dreams. DeNA's major business areas are in mobile games, sports, live streaming, healthcare, and automotive.

We have provided 100+ mobile apps for fans of famous Japanese musicians through our developed low-code app platform, enabling us to deliver these apps quickly.

“giftee” is a service that enables one to send an eGift via email or LINE, etc, along with the wishes of thank you, congratulation, good job, in a casual manner. A wide range of casual gifts are available for your selection, redeemable at the respective stores nationwide.

Vonage has everything you need to build connected applications with our APIs for SMS, Voice, Video, Verify and more. Whether you want to make and receive phone calls with code, reach users by the messaging platforms they prefer or ensure that users provide the correct contact details, we’ve got you covered. You can also easily integrate with social chat apps such as Facebook Messenger, WhatsApp and Viber, or build in-app voice and messaging experience on mobile and web. We also support open-source libraries for Ruby that enable you to build scalable communications features such as two-factor authentication, notifications, group messaging and calls.

The convenience store gym "chocoZAP" is a place where anyone can easily continue to exercise and feel its effects. It's "simple," "convenient," and "fun," all accessible with just one smartphone.

We have adopted Ruby as the core technology in the chocoZAP, and we are developing better service in-house.

Rubyists Wanted!

As we have basically adopted a telecommuting workstyle, applications are possible from anywhere in Japan.

The RIZAP Group is an organization where young employees can thrive!

Would you like to join us in improving the chocoZAP?

Tabelog is the best way to find restaurants and review them in Japan.
From 2005, we have accumulated over 59 Million Reviews and data for about 850k restaurants. We help "Over 90 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.

"mybest" is a service that helps create the best possible selection experience.
We help to match users with goods and services, improving the process of making choices to enrich people's lives.
Furthermore, we aim to expand the range of our services by supporting the various choices that users encounter in their daily lives.

Flatt Security is a company of product security professionals that has been supporting the product security efforts of a wide variety of companies across industries since the start of our security business in 2019.

The aim of our mission "Ruby × Pioneering the future with innovative technology" is to contribute to society by evolving Ruby language as well as utilizing it to integrate new technologies into our society.
In addition to expanding Ruby language, our mission also implies that we are commited to supporting, nurturing, and producing more Ruby Engineers (Rubyist).

- Our Mission -
To bring a new dimension to the wellness industry.

We aim to bring the wellness industry, which is behind in digitization, online, change the structure of the industry, and advance solutions to health issues in developed countries.
hacomono, we pursue our (the) business with this in mind.
hacomono uses Ruby on Rails for its backend.
We will continue to contribute to the future development of RubyKaigi.

"We create Healthtech Platforms. "
MedPeer Group is a company founded by an active physician. Our core business is MedPeer, a community platform for physicians, in which over 170,000 of Japan's physicians participate, and we provide services that support the value chain of healthcare.

We're committed to enriching communication and inspiring moments of joy for friends and families with services like mixi, MONSTER STRIKE, FamilyAlbum, and TIPSTAR. By placing User Surprise first and putting depth and meaning over quantity and frequency, we hope not only to connect minds but to touch hearts as well.

At Techouse our slogan is "We Develop".
With this guiding principle we commit ourselves to creating businesses that solve challenges across many facets of society. Currently our focuses are in HR and manufacturing with CloudHouse, an HR platform, and JobHouse Factory, Japan's recruitment platform boasting the most job offers for factory workers.

Because we are always looking to the next challenge we require tools that excel at rapid prototyping. Ruby and Ruby on Rails deliver on this need, which is why we adopt them across many of our products. Using these powerful tools we continue to take on the challenge of creating innovative solutions.

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 information technology which are targeting those who are associated with aging society in Japan and Asia Oceania since our founding in 2003.

JetBrains is a global software company that creates professional software development tools and advanced collaboration solutions trusted by more than 15 million users worldwide. RubyMine is an intelligent AI-powered cross-platform JetBrains IDE that provides all essential tools for Ruby and Ruby on Rails developers out of the box. It offers smart code completion and analysis, easy code navigation, safe automated refactorings, an interactive debugger, Git workflow support, database integration, and many other tools. All tools are integrated together in a highly customizable, productive, user-friendly environment.

freee's mission is to "Empower Small Businesses to Take Center Stage". freee develops and offers an "integrated management platform" to automate and streamline all back-office operations, enabling small businesses to run their businesses freely and independently.

Wantedly is a Tokyo-based technology company that focuses on mission-driven recruitment and employee engagement.
Wantedly aims to connect people with the right opportunities, creating a world where work drives passion.

TokyoDev’s job board is filled with software developer positions at Japanese companies whose engineering team’s primary language is English. From the big companies you’ve already heard of, to smaller up-and-coming startups, our positions offer you the chance to live in Japan but work in an international environment.

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 "Talent infrastructure".

TenshokuDRAFT is a recruitment service. Companies put out the job offer with annual income based on their skills and experiences to IT engineers, just like the professional baseball draft.

Both Being Co., Ltd (hereafter "Being") and Luxiar Co., Ltd (hereafter "Luxiar") belong to "Being Group".
"Being" is a software service vendor founded in 1984 and has been developing and selling many BtoB software services, including the software with the largest market share in Japanese construction industry.
"Luxiar" (https://www.luxiar.com) has been developing systems specializing in Ruby on Rails since 2007 and has many achievements.
"Being" and "Luxiar" as a "Being Group" develop and operate a web application so called "INSHARE" for the construction industry using Ruby on Rails jointly.

HireRoo is an online coding testing service that reduces mismatches in the engineering hiring process. We hope to contribute to the RubyKaigi 2024 as a sponsor and support Rubyist in achieving our mission of "Realizing a world in which all engineers are valued fairly and can demonstrate their full potential"

note is a media platform where creators can freely post and sell various contents such as texts, images, audio and video, and readers can enjoy the contents ,support creators and make purchases.

stmn, inc. aspires to become a company that unleashes the full potential of "individuals and organizations," fostering a succession of businesses aligned with our management philosophy: to deliver inspiration and spread happiness to a wider community. Our employee engagement platform, "TUNAG," empowers us to achieve this goal.

SimpleForm Inc. champions a vision of fair connectivity for all businesses through "SimpleCheck," innovative software automating corporate research. By simply inputting a company name, SimpleCheck rapidly aggregates and analyzes global data alongside our unique insights, delivering reports in just 30 seconds. Since its launch in June 2022, it has garnered trust from over 50 clients, including major financial institutions and platforms. We meld advanced technology with rigorous human research to streamline and refine financial and commercial transaction screenings, propelling operational efficiency and sophistication for our clients.