Flaky Test Rescue
Turn a flaky Appium suite into a reliable, green pipeline — from diagnosis to full stabilization.
Services — Fukuoka, Japan
Done-for-you engineering, from a company that ships its own products.
Fixed-price packages for the work we've productized — mobile test automation, sites, MVPs — and custom engagements for everything else. English, Japanese, and Chinese, direct with the engineer.
01 — Flagship
Test Automation
ACCEPTING PROJECTS
Deep specialization in Appium and mobile testing — the work most teams can't staff for.
Test Automation Setup
Stand up mobile test automation from scratch — single platform to full cross-platform coverage.
E2E Test Suite
End-to-end coverage for your critical user flows, built to run on every release.
02 — Catalog
Build, Automate, Advise
From sites and MVPs to AI integration and technical advisory — every engagement delivered remote-first, to the same standard.
01
Landing & Site
High-craft landing pages, corporate sites, and marketing pages — built to convert.
Landing · Corporate · Marketing
- StarterLanding page
- from $3,500
- StandardMarketing site
- from $11,000
- ProPro build
- from $20,000
02
App MVP
Ship a production MVP in a focused sprint — web, mobile, or mobile with Appium automation built in.
Web · Mobile · Sprint
- StarterWeb MVP
- from $12,000
- StandardWeb premium / Mobile
- from $22,000
- ProMobile + Appium
- from $40,000
03
Automation Script
Custom automation, data pipelines, and dashboards — from a single script to large-scale with monitoring.
Scripts · Pipelines · Dashboards
- StarterSingle-source
- from $1,800
- StandardMulti-source
- from $4,000
- ProLarge + monitoring
- from $10,000
04
AI & LLM Integration
Put LLMs to work inside your product or workflow — RAG pipelines, API integration, prompt design, and evaluation. Built by a company that ships its own AI products.
LLM · RAG · Evals
Custom quote
Get in touch →05
Business Automation & Internal Tools
Replace spreadsheet rituals and manual handoffs with internal tools that fit how your team actually works — admin panels, workflow systems, back-office automation.
Workflows · Admin · Back Office
Custom quote
Get in touch →06
Localization Engineering
i18n architecture, CJK typography, and native-quality Japanese, English, and Traditional Chinese — engineered and reviewed in-house.
i18n · EN · JA · ZH-TW
Custom quote
Get in touch →07
Legacy Modernization
Careful, test-guarded modernization of aging codebases — audit first, then incremental refactoring and migration without stopping the business.
Audit · Refactor · Migrate
Custom quote
Get in touch →08
Technical Advisory
A senior engineer on call — architecture reviews, code audits, build-vs-buy decisions, and spot consulting in English, Japanese, or Chinese.
Reviews · Audits · Spot Consulting
Custom quote
Get in touch →03 — How We Work
A company, not an agency.
RINSAI TECH is a solo-engineer company in Fukuoka: the person you email is the person who designs, builds, and ships your work. Remote-first, across Japan and abroad, working in English, Japanese, and Traditional Chinese. Scope is agreed in writing before anything is billed.
Remote-First · Fukuoka HQEN · JA · ZH-TWDirect With The Engineer
Prices in USD; checkout adapts to your local currency. ¥ invoicing with a qualified invoice (適格請求書) is available for Japan and compliance needs.
Ongoing maintenance retainers are available — typically 10–15% of build cost per year, or $300–1,000+/month for automation.