Hire the Best Kubernetes Developers
in Japan

👋 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.

Hi, I’m Yoshiyuki - a full‑stack and front‑end web developer with 25+ years in IT and 13 years building modern web applications. I love creating clean, user‑friendly, and scalable software, and I enjoy working closely with clients to turn ideas into something real and useful. My main tools are Angular, Java, TypeScript, Node.js, AWS, and Google Cloud, and I’ve recently added AI‑accelerated development to my workflow. Using tools like Copilot and Claude helps me move faster, explore more ideas, and deliver MVPs and prototypes quickly - while still keeping the code clean and maintainable. What I can help you build - Fast MVPs and prototypes - Internal tools and dashboards - CRUD applications - Front‑end architecture (Angular specialist) - Cloud‑ready applications (AWS / GCP) - AI‑assisted development for rapid delivery A bit about my background I’ve led teams, built internal Angular libraries used across 10+ teams, redesigned front‑end architectures for long‑term sustainability, and delivered MVPs for government and enterprise clients. I’m comfortable taking a rough idea and turning it into a working product. How I work - Friendly and easy to communicate with - Clear explanations and regular updates - Clean, maintainable code - Fast iteration using AI‑assisted workflows - Flexible with time zones and schedules If you’re looking for someone who can move quickly, collaborate openly, and deliver solid, future‑ready software, I’d be happy to help bring your project to life.

Hi, I’m Ollie. I’m a full-stack developer based in Japan with over 5 years experience specialising in modern React and Svelte applications. Whilst working at a leading London digital agency, I delivered full-stack solutions for Dell, Lenovo, Hitachi, Juniper, and AWS, ranging from custom web apps to high-converting landing pages. What you get working with me: ✔ Clean and readable code over abstraction ✔ Mobile first, accessibility built-in ✔ Pragmatic TDD approach where it adds value ✔ Clear and honest communication ✔ Fast iteration - 2 years experience with Cursor ✔ Affordable hourly rate On AI: I use Cursor, Codex and CC but never blindly. I work from refined context docs to maintain standards across projects and always review any generated code. Core frontend: - Either React (Vite), Next.js or SvelteKit - TypeScript or JavaScript - Tailwind or Sass Other frontend experience: Astro, Framer Motion, Jest + RTL, Vitest, React Query, Zod, Zustand Core backend: - Express - Django or FastAPI - Supabase (preferred BaaS) or Firebase Other backend experience: Symfony, Laravel, Phoenix Infra and other tools: - AWS (S3 + CloudFront) - Docker - Figma - Github Actions - Electron - Kubernetes - Sanity For mobile: - Capacitor - Android Studio I'm looking forward to working with you.

I help companies run reliable, scalable Kubernetes infrastructure on AWS and Azure — so their teams can ship faster without breaking production. With 5+ years of hands-on experience, I have worked on enterprise platforms at MetLife Insurance and Tata Consultancy Services in Tokyo, handling everything from Kubernetes cluster management to production incident response. What I can do for you: ▸ Set up and manage production EKS / AKS clusters on AWS & Azure ▸ Implement Istio service mesh with blue-green & canary deployments ▸ Build CI/CD pipelines using ArgoCD, Azure DevOps, GitLab, or Harness ▸ Write Terraform IaC for cloud infrastructure from scratch ▸ Set up monitoring with Prometheus, Grafana & Azure Monitor ▸ Harden your cluster security — RBAC, IAM, Key Vault, network policies Certifications: ✔ Certified Kubernetes Administrator (CKA) ✔ AWS Certified SysOps Administrator – Associate ✔ JLPT N2 Japanese Based in Tokyo, Japan — available for async work with US, EU, and Japanese teams. If you have a DevOps challenge, I'll get it done right.

I’m a Backend, AI, and Automation Engineer who helps businesses streamline operations, reduce complexity, and launch reliable products quickly. With experience spanning backend systems, workflow automation, and cloud DevOps, I specialize in transforming ideas into production-ready solutions and guiding projects from concept to MVP. Core Expertise: -AI & LLMs: Built intelligent assistants using GPT, Claude, and Gemini with RAG pipelines, JSON outputs, and evaluation frameworks—supporting industries like healthcare, finance, and e-commerce. -Workflow Automation: Designed and deployed automation with Zapier and n8n to connect tools such as Gmail, Google Sheets, Slack, CRMs, and payment systems, improving efficiency and eliminating repetitive tasks. -Backend Systems: Developed RESTful APIs in Node.js/Express and Python/FastAPI, integrating with PostgreSQL and Redis to support high-demand applications with clean, scalable architecture. -DevOps & Cloud: Set up CI/CD pipelines with GitHub Actions, Docker, and Kubernetes. Deployed solutions on AWS, GCP, and Azure with secrets management, monitoring, and rollback strategies for reliable delivery. -MVP Development: Worked with founders to shape ideas into functional MVPs, covering architecture design, backend services, AI integration, and cloud deployment—delivering ready-to-demo products from scratch. -Bot Development: Built and maintained Discord bots, Telegram bots, and crypto trading bots, integrating real-time APIs, event handling, and automation logic to deliver interactive and revenue-focused tools. I bring a mix of hands-on coding, architectural design, and automation expertise, so you get solutions that are functional, scalable, and secure. Clients value my ability to deliver quickly, adapt to evolving needs, and provide clear documentation for long-term maintainability. If you’re looking for someone who can blend AI innovation with backend reliability, DevOps best practices, MVP development, and bot automation, let’s connect and start building.

Hello there. 🙇‍♂️ I am an AI & Full Stack Developer with professional experience at a leading Japanese AI company, specializing in medical AI solutions. My expertise lies in designing and deploying advanced machine learning systems, building scalable web applications, and bridging the gap between AI research and real-world product development. 🔹 AI & Machine Learning Expertise ・ Specialized in medical AI applications, including diagnostic support tools and predictive analytics. ・ Experienced in deep learning, NLP, and computer vision with a strong focus on healthcare data compliance and accuracy. ・ Built and deployed AI models in Flask and FastAPI, ensuring seamless integration with modern web platforms. 🔹 Full Stack Development ・Frontend: Next.js, React, Vue.js, TailwindCSS – delivering fast, modern, and responsive UIs. ・Backend: Go, Flask, C++, C#/.NET, Rust, Django, FastAPI – developing secure and scalable APIs, Laravel. ・Databases: PostgreSQL, MySQL, MongoDB, Redis. ・DevOps: Docker, CI/CD pipelines, cloud deployment on AWS & GCP. 🔹 Key Achievements ・Developed a system that automates the annotation of medical radiology images and clinical data using AI. ・Developed an AI-powered medical imaging system that improved diagnostic accuracy for early-stage conditions. ・Led the design of a predictive healthcare analytics dashboard for doctors, enabling real-time insights. ・Built and scaled end-to-end SaaS platforms, from backend APIs to interactive frontends, used by healthcare professionals. ・Successfully collaborated in cross-cultural teams in Japan, working closely with medical experts and researchers. 💪Skills ・AI/ML: Deep Learning, NLP, Computer Vision, TensorFlow, PyTorch ・Languages: Go, Python, C++, C#, Rust, TypeScript, JavaScript, Haskell. PHP ・Frameworks: React/Next.js, Vue.js/Nuxt, Flask, FastAPI, Django, .NET, Laravel ・Databases: PostgreSQL, MongoDB, MySQL, Redis ・DevOps: Docker, Kubernetes, AWS, GCP, Azure, CI/CD (GitHub Actions, GitLab CI) ・Specialization: Medical AI, Healthcare Data Systems, AI Model Deployment 🌍 Why I Am Here I’m here on Upwork because I want to bring my experience from building advanced AI systems in Japan’s medical technology field to clients around the world. Having worked on projects that directly impacted doctors and patients, I’ve seen how the right mix of AI innovation and practical engineering can solve complex problems and create real value. Now, I want to collaborate with startups, businesses, and researchers who are looking for: ・AI-powered solutions (from prototypes to production-ready systems) ・Full-stack web applications that integrate seamlessly with AI models ・Scalable platforms that are reliable, secure, and ready to grow I joined Upwork because I believe the future of innovation lies in global collaboration. Whether it’s healthcare, SaaS platforms, or new AI-driven products, I’m excited to apply my skills to projects that make a difference. Work Style & Collaboration I value clear communication, timely delivery, and deep technical problem-solving. My background in medical AI ensures I bring both technical excellence and domain knowledge to projects where accuracy and reliability are critical. If you are looking for a developer who combines AI expertise, full-stack engineering, and proven medical AI experience, I’d be excited to help bring your ideas to life. Let’s create something meaningful.🚀 Best regards.