Think. Build. Deliver. With AI.

From goal alignment and spec planning to UI/UX design and AI-assisted development.
We put AI and engineering at the center of every delivery.

ISO 27001:2022Information security certified
Taiwan × JapanDelivery team
AI-assisted developmentFaster delivery
Post-launch maintenanceStable & reliable
80+
Professionals
230+
Clients
520+
Projects
99.8%
Launch rate
Taipei, Taichung Kaohsiung, JapanTeam Locations
WHAT WE DO

Three Core Capabilities Entrust it all, or partner on a single piece

How many partners does it take to go from 0 to launch? JoinX is all you need.

01
Build the product right

Custom Design & Development

  • APP, Web, Systems, Software, Visual Design
  • System Integration, API Connection & Maintenance
  • Legacy Project Takeover & Refactoring
02
Make the workflow smarter

AI Integration

  • GenAI, LLM, RAG, AI Agent
  • AI Workflow Automation & Internal Tools
  • Connecting AI Capabilities to Existing Systems
03
Get CTO-level judgment

Technical Consulting

  • Tech Stack Selection, Architecture Planning & Assessment
  • Code Review & Performance Optimization
  • Team Mentoring & CTO-level Decisions

APP DEVELOPMENT

Choosing an app development partner?

Compare selection criteria, understand the development process, and discuss your requirements.

Discuss your app project
SELECTED WORK

Selected Work

Starting from the problem, we show clients how we understand the industry, design solutions, and bring products stably to market.

CLIENTS' FEEDBACK

Over 230 enterprise partners choose JoinX to realize their product vision

Trust built on reputation — our clients' feedback is the best report card.

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Praised and recommended by 200+ enterprise partners

JoinX helped us optimize our website, develop products, and strengthen our cybersecurity, enabling Fundhot to firmly hold its position as the largest mutual fund investment community. Choosing JoinX as our key partner is the wisest decision I've made since starting my business.

Wang, Da ZhongFundhot・Co-founder