株式会社 UPSIDER
Open positions
B310. Legal - 法務
新たな事業創造を法務面から支援！堅牢な事業、組織を創造する法務メンバーを募集！！ 仕事概要 ## 募集背景 2025年7月、みずほFGへの戦略的グループインを発表して以降、事業成長はさらに加速しており、今後も複数の新規事業を立ち上げる構想がございます。 レギュレーションが複雑に絡み合う金融業界で次々と新規事業を立ち上げるためには、従来の延長線上の論点ではなく、全く新たな法律の論点を検討する場面が珍しくありません。…
B254. Backend Engineer - 請求基盤(Hermes)
Backend engineer on UPSIDER's 'Hermes' team, building the billing platform at the heart of its fintech products: designing invoice-to-payment-to-collections workflows in Go and Temporal, with high-precision financial calculations. Full remote / full flex (Tokyo office listed); stack includes gRPC, Kubernetes/GKE, MySQL, Prometheus, Terraform. Salary ¥8.1M–¥12M.
B257. FullStack Engineer - 法人審査基盤(Hestia / CfC)
Full-stack TypeScript engineer at UPSIDER (Tokyo-based fintech) building its corporate credit-review/underwriting platform: customer onboarding/eKYC screens, internal review-operator admin tools, and shared backend APIs/event integrations. Stack: React 19, Node.js/Hono, Prisma/PostgreSQL, gRPC/Pub/Sub, GCP; full remote, full flex.
B301. Systems Engineer（Corporate DX/AX）
Systems engineer at UPSIDER (fintech) to redesign corporate functions — Legal, Compliance, Risk Management, HR, Accounting — around AI: building LLM-based business systems, data platforms with audit trails/access control, and evaluation frameworks. Stack: Python/Go/TypeScript, Google Cloud, BigQuery, Terraform, dbt, Claude/Gemini. Full remote, full flex.
B302. Corporate IT (Corporate IT Architect / Engineer)
Corporate IT Architect/Engineer at UPSIDER, a Japanese fintech, who designs, deploys, and runs company-wide IT infrastructure — identity (Okta), endpoint management (Intune MDM), SaaS management, and office/remote networking — while automating IT operations via APIs, scripts, and workflows. Full-remote, full-flex role based in Tokyo.
B303. Corporate Security (Security Risk & Governance Manager)
"ISMS・PCI DSSから経営レポーティングまで"全社ガバナンスを推進するセキュリティメンバーを募集<フルリモート・フルフレックス> 仕事概要 ## 募集背景 UPSIDERは累計導入企業数120,000社を超える金融プラットフォームを展開し、事業・組織ともに急速に成長しています。…
B304. Corporate Security (Security Architect / Security Engineer)
Design and manage corporate security architecture, SecOps, and incident response for a growing fintech platform. You will handle security solution implementation (Okta, CrowdStrike, Cloudflare), automate operations using IaC/Python, and lead detection engineering and threat hunting efforts to support the company's expansion and financial compliance requirements.
B243. Backend Engineer - 基盤開発(Solaris)
Backend engineer (Tokyo office, full-remote/full-flex) to lead design, development, testing, and operations of a new corporate-card platform foundation for alliance partners at UPSIDER, integrating with the existing payments stack. Stack: Go, gRPC/REST, PostgreSQL, GCP, Kubernetes, Terraform.
Y108. Inside Sales - インターン
フルリモートOK！急成長中のスタートアップ企業でインサイドセールスのインターン募集！ 仕事概要 ##### 【UPSIDERについて】 UPSIDERは2018年に創業し、「挑戦者を支える世界的な金融プラットフォームを創る」をミッションに、法人向けの革新的な金融サービスを展開しています。現在に至るまで、*累計導入企業数は12万社を超え、*累計決済額は1.5兆円を突破しました。 *1…