Hire the Best TypeScript Developers
in Japan

“I reverse-engineer complex problems, ask the right questions, and deliver production-ready code that drives business growth.” Hey there! I’m a product-minded Full-Stack Developer who owns the entire product lifecycle—from database architecture to cloud deployment. With a background managing international sports teams across Asia, I thrive under pressure, communicate transparently, and excel at aligning with clients even when project specifications are unclear. I don't just write code; I treat your application as a business. Whether you need to modernize a legacy application or build a secure, scalable web app from scratch, I focus on clean architecture, high performance, and rapid shipping. 🚀 WHAT I BUILD FOR YOU: SaaS Platforms & MVPs Fast: Turn your product idea from a wireframe into a fully deployed, launch-ready application in weeks, not months. Legacy System Modernization: Migrate slow, outdated systems (e.g., C# to modern tech stacks) into clean, scalable architectures with zero downtime. API Integration & Complex Backends: Design and implement robust, high-throughput RESTful APIs using Python and FastAPI. ⚡ RECENT WINS: Led the full-stack modernization of a 100+ screen legacy C# application to Next.js and FastAPI, successfully solving complex AWS serverless bottlenecks. Single-handedly built and launched a B2B staff scheduling SaaS (Shift-Pilot) that reduced administrative workload by 80%. 🤖 AI-POWERED FAST SHIPPING: I leverage modern AI engineering tools to double development speed while maintaining enterprise-grade code quality and security: AI Tools: Cursor, GitHub Copilot, ChatGPT, v0.dev, Claude Code Note: I don't implement AI features just to look trendy—only when it directly automates workflows and cuts operational costs. 🛠 EXPERT SKILL STACK: Frontend: Next.js, React, TypeScript, JavaScript, Tailwind CSS Backend & APIs: Python, FastAPI, Node.js, RESTful API Design Cloud & Database: MongoDB, PostgreSQL, AWS (Lambda), Serverless, GitHub Actions (CI/CD) If you are looking for a reliable, technical partner who communicates in plain English (no tech-jargon) and delivers high-performance solutions, let's talk! 📩 Send me a message or invite me to your project. Let's hop on a quick call!

I build React + Three.js/WebGL interfaces for products that need more than standard forms and buttons: 3D product configurators, interactive dashboards, browser-based demos, WebAudio tools, and rapid MVP prototypes. My strongest fit is when you already have an idea, backend, design, or product flow and need a working frontend version fast. What I can help with: • 3D product configurators with real-time options, pricing logic, materials, lighting, and interactive previews • React / Next.js dashboards, admin panels, and frontend interfaces for existing backends • Three.js / React Three Fiber scenes, WebGL performance fixes, and browser-based 3D tools • WebAudio players, visualizers, and interactive audio interfaces • Fast MVP / proof-of-concept builds using React, TypeScript, Three.js, APIs, and AI integrations Recent relevant work: • Built an interactive 3D e-commerce configurator with dynamic pricing, UI tooltips, material options, WebAudio previews, and live quote sharing • Delivered browser-based interactive tools using React, Three.js, WebGL, WebAudio, and API integrations • Worked on touchscreen kiosk apps, educational simulations, and custom frontend prototypes I focus on practical delivery: clear scope, fast first working version, clean frontend structure, and small milestones that let you verify progress early. Best projects for me: • “I need a working prototype fast” • “I have a backend/design but need the frontend built” • “I need a 3D product viewer/configurator” • “My React/WebGL interface is unfinished, slow, or messy” • “I need an interactive demo before investing in a full product”

Hi, I’m Yugo. Designer and a full-stack developer with 6+ years of experience delivering scalable, high-impact web applications across industries. Frontend: 3 years with Vue 3, 2 years with Angular Backend: 3 years with Django, 2 years with .NET Core Cloud & Tools: Amazon CloudWatch, Shopify, API integrations 3D Development: Integrating 3D objects into websites, interactive experiences Some projects I’ve worked on: A work management system managing employees, salaries, vacations, and financial data A financial startup platform for lending services, handling frontend/backend bug fixes, reporting, and AWS CloudWatch Shopify sites for content updates and ecommerce management 3D projects integrating interactive 3D models into websites, enhancing user engagement and visual appeal I love blending technology and creativity. From SaaS solutions to 3D-enhanced websites, I bring a sharp eye for detail and a passion for innovation. I'm fluent in Japanese, English and Portuguese, I also provide voice over. I’m currently available for freelance projects, let’s build something amazing together!

I develop, debug, and convert TradingView Pine Script and MT5/MQL5 tools with clean documentation, testing steps, and human-review checkpoints. I also build AI-assisted workflow automation using n8n, Claude, APIs, and Python, with a focus on logging, maintainability, and risk-aware design. My past work includes indicator debugging, strategy conversion, backtesting support, automation workflows, and EdTech tools backed by 30 years of teaching experience. AI Workflow Automation Your AI employee who never sleeps. I design business workflows using Claude MCP, Cowork, and n8n that automate repetitive tasks. Submit work at night, wake up to results. Quarterly maintenance subscriptions keep your setup current as AI tools evolve. Recent: AI workflow consultation for a beauty salon. Trading Tool Development From 1,850 live trades to your custom algorithm. Pine Script indicators for TradingView (QQE v3.0 with strong community support), MT5/MT4 Expert Advisors with verified backtest results, NinjaScript strategies, and TradeStation EasyLanguage. Cross-platform deployments where the same logic runs consistently on every platform. Educational Technology Claude Code + MCP + 30yr STEM Expert = Your unfair advantage. AI-powered question generators, exam preparation apps (530+ question database for university entrance exams), and STEM curriculum development. I combine deep subject matter expertise with AI to produce educational content that works. I work through text-based asynchronous communication. This produces clearer specifications, better documentation, and a complete record of every decision. Portfolio links: See my GitHub, MQL5, and YouTube profiles in the Portfolio section below.

Hi I am Edmer, I live in Shibuya, Tokyo, with around 10 years of IT experience as a web app and mobile app Engineer, I specialize in Typescript, Kotlin, Swift, Dart, Objective-C and Java Throughout my career, I’ve developed a strong track record in product design, implementation, integration testing, and bug fixing for Web, Android, iOS applications. I've had the opportunity to work on a variety of web and mobile applications, particularly in the E-COMMERCE space, including shopping carts and IoT applications. I’m passionate about creating user-friendly and innovative app solutions, and I’m excited to bring my expertise to new challenges. I have a Project Leader experience with my first IT company in Kawasaki, Kanagawa. I had experience making an app from scratch. I can help you build your app that will be modern, visually appealing and can be user friendly.

👋 Hello and welcome! I’m a passionate Senior Full-Stack Developer with 9+ years of experience, specializing in modern frontend & backend frameworks, AI, Web Scraping, Web3, and Mobile App Development. I don’t just write code—I craft high-performance, scalable, and future-ready solutions tailored to your unique needs. Whether you're a startup looking to disrupt the market or an established business aiming for digital transformation, I'm here to bring your vision to life. What I Can Do for You: ✅ Frontend Excellence: React.js, Next.js, Vue.js, Svelte, Angular, TypeScript, Tailwind CSS, Material-UI ✅ Backend Mastery: Node.js (Express/Nest.js), Python (Django/Flask), Laravel, Java Spring, .NET ✅ AI & Web3 Solutions: ChatGPT/OpenAI, TensorFlow, Blockchain, Smart Contracts, Solidity, NFT Platforms ✅ Web Scraping & Automation: Puppeteer, Selenium, Scrapy, BeautifulSoup, Reverse Engineering, Captcha Bypass ✅ Mobile App Development: React Native, Flutter, Swift, Kotlin, Expo – delivering seamless cross-platform experiences ✅ Database & API Integration: MySQL, PostgreSQL, MongoDB, Redis, Firebase, REST, GraphQL, Stripe, Twilio, Google Maps ✅ DevOps & Cloud: AWS, GCP, Docker, Kubernetes, CI/CD Pipelines Why Clients Love Working With Me: - 100% Client Satisfaction – I treat every project as my own and strive for perfection. - Fast & Reliable – Clear communication, quick execution, and on-time delivery. - Scalable & Secure Code – Best practices for performance optimization & cybersecurity. - Innovative Problem-Solver – I don’t just build software; I create solutions that drive success. - Long-Term Collaboration – I aim to build lasting relationships with my clients. Let’s build something amazing together! Message me now and let’s discuss how I can help you achieve your goals.