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Updated 2025-05-01
Activated 2025-05-01

Backend Engineer_Full Remote
Automatically translated job page

This posting is managed by: bloomtech.inc
Company Name Company is not publicly visible
Job Type
bloomtech.inc
IT (PC, Web, Unix) - Back-End Engineer
IT (PC, Web, Unix) - Fullstack Engineer
Industry Telecommunications/Information Services
Location Asia Japan Tokyo Minato

Job Description [Recruitment background]
There are still many things we want to do and have to do, such as developing new features, establishing an efficient development system, and making functions compatible with legal changes.
The number of users is increasing every year, and currently the average number of transactions is 60,000 per day. In order to pursue a safe and secure product that will not stop for even a second 24 hours a day, 365 days a year, the participation of top-class software engineers is essential.

[Technical challenges and challenges]

- Providing a new UX using AI technology

- Integration with third-party tools using various external APIs

- Converting monolithic services such as building an authentication and authorization infrastructure into microservices

- Establishing a development infrastructure and resolving technical issues to make the entire development team more productive and scalable

[Attractiveness of the position]

- You will be able to design and develop to solve user problems while dealing with the complex specifications of card payments

- High quality development is required, including stability, performance, and scalability

- You will be involved in analyzing various important data such as payment data and fraudulent use data

- You will be involved in new products from the early stages of development

- You will also be exposed to the field of Machine Learning, such as OCR and natural language processing

- You will be able to experience system development that is large-scale and will continue to scale in the future

[Job description]
You will be involved in the development of back-end systems such as the following examples related to corporate payments, accounting, billing, etc., which are the lifeline of user companies' management activities.
・Development and operation of the payment system that will be the core function of the UPSIDER card
・Fraud prevention, functional expansion, and non-functional improvement
・Realization of a highly functional and easy-to-use system through the development of new products and functional expansion
・Function development including chat function using AI
・Development of web applications and peripheral functions used by users
・Development of a common authentication platform for UPSIDER

[Reference information]
Engineer Deck
https://speakerdeck.com/upsider_official/upsider-engineering-deck

The future of scalability to meet business growth: UPSIDER's technology strategy
https://tech.up-sider.com/entry/20241122_technology_strategy

UPSIDER Official note
https://note.com/upsider_inc/
Company Info [About UPSIDER]

With the mission of "creating a global financial platform that supports challengers," UPSIDER is a company that develops and provides a corporate card "UPSIDER" that supports challengers, a bill card payment service "Saiwai.com," an AI chat-based business tool "UPSIDER Coworker," and a debt fund "UPSIDER BLUE DREAM Fund" specialized for growth-stage startups.

UPSIDER, the company's main business, is a corporate card with a maximum credit limit of 1 billion yen based on a unique AI credit model, real-time reflection of payment data, virtual card issuance, automatic integration with accounting software, and possible use restrictions for each card and employee... It has convenient functions that have not been available in corporate credit cards until now, and since the service was launched in September 2020, the cumulative payment amount has exceeded 450 billion yen (as of September 2024).

"Saiwai.com" is a service that was officially launched in April 2022 as a joint venture with Credit Saison, and the cumulative payment amount has exceeded 70 billion yen (as of August 2024).

Both services are used by many customers, with the total number of users exceeding 60,000 companies (as of September 2024).

UPSIDER Coworker also uses AI to automatically process over 20,000 receipts, significantly reducing users' work hours (as of August 2024).

UPSIDER BLUE DREAM Fund, which has a total of approximately 10 billion yen in capital, has already provided loans of 8 billion yen and achieved results such as the first borrower's stock listing (as of August 2024).

In November 2024, the company announced a Series D fundraising of 15.4 billion yen. The amount of funding since its founding has exceeded 60 billion yen.

We will continue to launch many category-leading businesses and aim to become an AI-based comprehensive financial institution that solves the pain points faced by challengers around the world.
Working Hours Flextime system
Job
Requirements		 Required skills
・Practical experience with Go or JVM-based languages (Kotlin/Java/Scala, etc.)
・Ability to consider what functions and designs are necessary for business requirements and implement them

Welcome skills
• Ability to design and implement with consideration for extensibility, robustness, scalability, testability, etc.
• Experience in operating web services and apps
• Experience leading or managing team, project, or technical decision-making
• Development experience in the field of finance and accounting systems
• Experience dealing with complex and difficult system requirements such as payment

Desired personality
・Someone who can empathize with UPSIDER's mission
・Someone who can propose specification changes and design improvements with a user-first mindset
・Someone who finds joy in "delivering value to users" rather than development that focuses on technology and means
・Someone who has a mind that can reach out to colleagues in need with respect
・Someone who can actively communicate with other members to share information
Japanese Level Business Level(JLPT Level 2 or N2)
Salary JPY - Japanese Yen JPY 5000K - JPY 14000K   
Other Salary
Description		 Social Insurance
Holidays Five-Day Workweek
Winter Holidays
Paid Holidays
Child-care Leave
Job Contract
Period		 Full-time employment
Nearest Station Minato-ku, Tokyo
*Full remote work
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