01
Build small, grow in operation
We prioritize designs that maximize improvement velocity after launch over upfront scale. Ship a minimal version to production first, then refine based on actual usage data.
NYUMA LLC — Software · Operations · Cross-border Commerce
Run your business
as software.
NYUMA LLC is a small software house that builds web applications from scratch, runs cross-border e-commerce operations, and automates business processes — all in-house. We don't just ship products; we redesign the operations around them.
- Founded
- 2019
- HQ
- Tokyo, JP
- Markets
- JP · TW · Cross-border
Tech Stack
About
Software that changes how a business runs.
Headquartered in Tokyo, NYUMA LLC operates its own cross-border purchasing services for the Taiwanese market and SaaS products in the LINE / restaurant verticals. The know-how we build through real operations is also offered as contract development and partnerships.
02
Choose technology we can maintain ourselves
We standardize on a stack we can maintain long-term: Python (Flask / FastAPI), vanilla JS, Astro, PostgreSQL (Supabase), AWS Lambda — chosen for reproducibility and operational sanity.
03
Design the entire operation, not just the app
We redesign more than code: on-site workflows, documents, notifications, monitoring, and customer support. The app is part of the operation, not the goal.
Services
Build it, then keep it running.
We treat product development and business operations as a single design target. Whether full-scratch or extending an existing platform, we choose the shortest path to a working system.
Web Application
→
Full-scratch Web Development
Business SaaS, internal operations tools, admin dashboards, API gateways, webhook hubs and more. We deliver end-to-end on a Python (Flask / FastAPI) + Astro + vanilla JS + AWS Lambda (Mangum) stack — from requirements to ongoing operation.
- Business SaaS
- Admin dashboards
- In-house core systems
- API / Webhook backbones
Platform Integration
→
Platform Extension & Integration
We add features, customize, and integrate on top of existing platforms — CyberBiz, LINE Messaging API, LIFF, Instagram / Threads Graph API, Stripe, Google Workspace and more. No need to rebuild from scratch.
- CyberBiz extensions
- LINE Bot / LIFF
- IG / Threads integrations
- Stripe payments
Cross-border Commerce
→
Cross-border EC & Proxy Purchasing
As an operator of our own cross-border services for Taiwan, we design multi-store operations centered on CyberBiz. We can run alongside your team end-to-end: sourcing, photography, listing, logistics, shipping notifications, billing and invoicing.
- Multi-store operations
- Shipping & notifications
- Billing automation
Automation & AI
→
Business Automation & AI
Spreadsheet ⇄ DB two-way sync, AI secretaries, LINE / IG / Threads auto-reply, AWS Lambda workflows. We replace repetitive on-site work with code or AI, redesigning the operation itself.
- Sheets ⇄ Supabase sync
- AI secretary / Ops bot
- LLM integration (Claude / GPT / Gemini)
Works
Products in operation.
These are services we build while running them ourselves. We take both cross-border services and SaaS products from product planning through development to daily operations.
Cross-border Service
↗
HowsBuy
A proxy purchasing service for individual customers in Taiwan, buying Japanese e-commerce products on their behalf. Multi-channel ordering across Web, LINE, Instagram and Threads, with low-cost JPY payments via Stripe — optimized for low-margin, high-volume operation.
- FastAPI
- AWS Lambda
- LINE / IG / Threads
- Stripe
- Supabase
Cross-border Service
↗
17Couple
A proxy purchasing operation that bulk-procures Japanese e-commerce and retail goods and ships internationally to Taiwan. CyberBiz multi-store EC plus our in-house core system (orders, shipping, payments, notifications) keeps procurement through customer notifications fully in-house.
- CyberBiz
- Flask
- SQLAlchemy
- Supabase
- LINE Login
SaaS
↗
Ja1Go
A LINE / Instagram-integrated order-management SaaS for Taiwanese live commerce and proxy buying merchants. Customers complete an order simply by replying "+1" to a comment or DM. Multi-tenant by design, with completely isolated products / inventory / payments / notifications per client, encrypted storage, and a single-plan pricing model.
- Flask
- LINE Messaging API
- Instagram Graph API
- LIFF
- Stripe / LINE Pay / ECPay
- Multi-tenant
SaaS
↗
QOO
A mobile-ordering SaaS for restaurants. LINE login keeps the customer flow seamless, Flex messages confirm orders, and QR codes digitize in-store operations. Menus, carts, and order-status management are all handled in one app.
- Flask
- LINE Login
- LINE Flex Message
- QR Code
News
Latest updates.
Contact
Let's talk first.
Reach out about our services, contract development, recruiting, press inquiries — anything. We respond within three business days.
- info@nyuma.net
- LINE
- @487rposq
- Hours
- Weekdays 10:00 – 18:00 (JST)
- Location
- 4-5-1-401 Shimo, Kita-ku, Tokyo, Japan