Kazuaki S.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

I've helped take two companies public on the Tokyo Stock Exchange. Not as a banker or consultant — as the person who built the revenue engine that made it possible. These days I apply the same thinking to AI systems — build the right infrastructure, automate the right processes, and make the numbers work. 𝗥𝗲𝗰𝗲𝗻𝘁 𝗽𝗿𝗼𝗱𝘂𝗰𝘁𝗶𝗼𝗻 𝘄𝗼𝗿𝗸 𝗜'𝘃𝗲 𝘀𝗵𝗶𝗽𝗽𝗲𝗱: ▸ Thai EdTech platform — users submit a profile, Claude analyzes it, a personalized branded report lands in their LINE account within 1 hour. Fully automated. 500+ submissions/month without me touching it. ▸ AI CV builder — interviews users conversationally, pulls from 471 reference documents, outputs a tailored Word doc. No human in the loop. ▸ 5-trigger LINE engagement system — post-test follow-ups, inactivity nudges, plateau interception, broadcasts. Every stage of the pipeline automated with anti-spam logic. ▸ Full-stack platform underneath all of it: Next.js, Payload CMS, FastAPI, PostgreSQL, Redis, Celery, S3. Flexible deployment — cloud or self-hosted. Automation, automation, automation. That's still the name of the game. The tools changed. The principle didn't. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 𝗪𝗵𝗮𝘁 𝗜 𝗯𝘂𝗶𝗹𝗱 𝗳𝗼𝗿 𝗰𝗹𝗶𝗲𝗻𝘁𝘀: ▸ AI chatbots and customer service automation (LINE, WhatsApp, web) ▸ RAG systems — knowledge bases, document Q&A, personalized content generation ▸ AI-powered internal tools and dashboards ▸ Workflow automation with Claude or GPT-4 — lead qualification, report generation, email triage, content pipelines ▸ Custom integrations: Claude API, OpenAI API, LINE Messaging API, WhatsApp Business API, Twilio, n8n 𝗧𝗲𝗰𝗵 𝘀𝘁𝗮𝗰𝗸: Python (FastAPI, Celery), TypeScript (Next.js, React), PostgreSQL, Redis, Anthropic Claude API, OpenAI API, RAG, Wasabi/S3, Docker. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ I'm Japanese-American. Grew up between the US and Japan, spent 10+ years in Japanese corporate environments, currently running operations in Thailand. Conversational Japanese, comfortable reading hiragana and katakana, and I know how Japanese business actually works — the communication style, the decision-making pace, what LINE means in a customer context. If you're a Western brand expanding into Japan, or a Japanese operation working with Western teams, I'm the gap you're looking for. Most freelancers can do one side. I do both. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 𝗙𝗿𝗼𝗺 𝗮 𝗿𝗲𝗰𝗲𝗻𝘁 𝗰𝗹𝗶𝗲𝗻𝘁 (5-year contract, 1,394+ hours, ongoing): ❝ Kazu quickly became not simply a freelancer but a core team member. He is in charge of multiple projects and is integrated with our organization. He researches and analyzes, proposes... ❞ ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 𝗛𝗼𝘄 𝗜 𝘄𝗼𝗿𝗸: ▸ I scope before I build. If the spec isn't clear, I'll tell you before quoting, not after. ▸ I push back when something is a bad idea. You're paying me to think, not just to execute. ▸ Async-friendly. I'll send a Loom before I schedule a call. ▸ I write tests for anything that touches money, user data, or external APIs. Send me a message. I'll get back to you within a few hours during Asia business hours. Happy to do a free 20-minute call to scope things out before either of us commits.