UPSIDER

Fintech · Corporate Payments · Business Lending · Tokyo, Japan

UPSIDER is a fintech group providing corporate payments and financing. Its products include the UPSIDER and PRESIDENT CARD corporate cards, Shiharai.com for card-based invoice payments, growth-debt funds, online lending and card infrastructure for financial institutions.

Its card software gives finance teams real-time transaction data, spending controls, receipt management and accounting integrations. The group earns money from card-related charges and fees on invoice-payment and financing products. Mizuho Financial Group’s FY2025 filing lists UPSIDER Holdings as a 76.9%-owned subsidiary; UPSIDER launched its AI-based Cash Boost lending service in June 2026.

Remote or hybrid
2 of 3
Most requested
Common areas
  • Frontend engineering 2
  • Backend engineering 1
  • Project management 1

Measured from the 3 listings Ranked has live for UPSIDER. Japanese level, visa signal and skills are AI-graded from each posting and can be wrong — confirm against the employer's original posting before applying.

3

1

Full-time

Japanese?

Project Mgr

Fintech

Payments

GenAI

Lead PMO operations for large partner projects in finance and payments. Coordinate schedules, risks, quality processes, stakeholder decisions, technical discussions, and AI-enabled improvements across multiple projects.

Full-time

Japanese?

Remote

GenAI

Python

GCP

Design and operate AI-first systems for Legal, Compliance, Risk, HR and Accounting, building data foundations, LLM workflows, evaluation, audit trails and access controls. Full remote and flex.

Full-time

Japanese?

Remote

Full-stack

TypeScript

React

Lead full-stack development and operation of Iris, a white-label corporate-card management platform, shaping requirements and APIs and building its TypeScript frontend and backend. Fully remote.