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Malt Strategy
Taegyu JeongTJ

Taegyu Jeong

AI Product builder | Fractional Co-Founder

€600/day
Paris, FR
3-7 years
AI
MVP
Vibe Coding
Firebase
Blockchain

Average response time: 1 hour

About Taegyu

Fractional Tech Co-founder & AI/Blockchain Product Builder

I help founders/companies turn ideas into validated AI/Blockchain products and market-ready MVPs fast.

Unlike traditional agencies that only build what you ask for, I work as a fractional technical co-founder. My focus is not just coding, but making sure what we build actually survives in the market.

I’ve built multiple AI/Blockchain products from scratch and launched them with real traction. My work combines product strategy, rapid MVP development, and go-to-market execution.

What I can help you with:

  • MVP development (LLM apps, AI SaaS, automation tools)
  • Startup idea validation and product strategy
  • Full-stack development (Next.js, Firebase, APIs, AI pipelines)
  • Rapid prototypes shipped in weeks, not months
  • Go-to-market systems (landing pages, automation, growth loops)

Previously I:
  • Founded a startup and raised $350K pre-seed + government grant
  • Built multiple AI/Blockchain products (LLM pipelines, marketplaces, automation tools)
  • Achieved 1M+ impressions and 30K landing page onboarding within 1st month
  • Delivered $1.3M annual cost reduction at Samsung Electronics
  • Selected as a Perplexity AI Business Fellow

My approach is simple:
Validate fast → build lean → launch early → iterate with real users.

If you’re a founder, domain expert, or company looking to launch an AI/Blockchain product quickly, I’d be happy to collaborate.

Let’s build something that actually works in the real world. 🚀
Digital and IT Services
Digital Business Models
Consulting and Audits
Software Publishing

  • Korean

    Native or bilingual

  • French

    Fluent

  • English

    Fluent

Remote only
Primarily works remotely

Experience

  • JTG.ai
    Product Builder & Studio Founder
    DIGITAL AND IT
    July 2024 - Today (2 years)
    Paris, France
    A boutique product studio providing fractional co-founder and full-cycle execution services (PM + Design + Dev + GTM) to startups and enterprises. Simultaneously built and launched 4 products across AI and blockchain from 0→1.
    ● Vibounder — AI-native PM tool · Agentic workflow generating Lean Canvas, PRDs, and roadmaps via iterative AI dialogue. Built custom MCP server for real-time strategy↔IDE sync.
    ● TSF — Tokenized seller-financing marketplace · Solidity smart contracts (pro-rata yield, Merkle verification) on Mantle + 40-page full-stack marketplace with hybrid on/off-chain compliance architecture.
    ● Genkle — English speaking diary app · Shipped AI features (STT, grammar, summarization, image gen) + automated Reddit acquisition pipeline.
    ● Trachemy — Co-founder matching platform · 0→250 users and 40+ pilot projects in first month via Bubble.io.
    Cursor Firebase Figma intelligence artificielle Vercel
  • Perplexity
    Perplexity AI Business Fellowship
    DIGITAL AND IT
    March 2025 - August 2025 (5 months)
    San Francisco, United States
    Explored enterprise GenAI adoption, building scalable prototypes and running fast learning cycles.
    ● Identified inefficiencies in job-matching funnels (95% irrelevant listings).
    ● Built Fine-Tune Job Agent (FTJA): LLM + vector search with 95%+ accuracy at $0.01/query.
    ● Designed evaluation framework, feedback loop, and metrics for continuous iteration.
    intelligence artificielle AI Product Management Replit Cursor chrome extension
  • Samsung Electronics France
    Chef de Projet
    TECH
    April 2023 - June 2024 (1 year and 2 months)
    Paris, France
    Worked cross-functionally with engineering, service, and HQ teams to improve product quality and reduce service cost across EU markets.
    ● Collaborated with engineering, service, and HQ teams across EU/Asia on quality initiatives.
    ● Analyzed ERP and field data to identify root causes of service cost escalation.
    ● Improved parts management processes, achieving $1.3M YoY service cost reduction.
    Data analysis ERP Cross-border team management Cross-functional Collaboration hardware
Check out Taegyu's experience

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Education

  • Master Entrepreneuriat & Gestion de Projet(VAE partielle)
    Université Paris-Panthéon-Assas
    2024
    Master Entrepreneuriat & Gestion de Projet
  • Licence Géographie & Aménagement
    Sorbonne Université
    2019
    Licence Géographie & Aménagement

Certifications

  • Digital Product Management: Modern Fundamentals
    University of Virginia
    2024
  • Blockchain Revolution
    INSEAD
    2022

Skill set

Figma
Google Analytics
API
LLM
Prototype
Cursor
Web3
Stitch
Stripe
GitHub
Google Cloud Plateform
GenAI
antigravity

Categories