Hirotaka Yamamoto

As a Software Engineer with over 10 years of experience, I have rich experience in AI & Fullstack development.

1. Programming Language:
Python, Go, Typescript, JavaScript, HTML5, CSS, TailwindCSS.

2. Backend Frameworks & Services:
• Python: FastAPI, Django/DRF, Flask, Starlette, aiohttp, Celery, Pydantic, SQLAlchemy, Poetry
• NodeJSTS/JS: Express, Fastify, NestJS, GraphQL&tRPC, WebSockets, Passport/jose, Jest/Vitest, pino/OpenTelemetry/Sentry
• Go: net/http, chi, Echo, Fiber, Gin, gRPC, grpc gateway, go kit, go zero, Kratos, Wire DI, Cobra CLI, GORM, ent, sqlc
• API styles: REST, GraphQL, gRPC, WebSocket/SSE; pagination, rate limiting Rack::Attack, idempotency keys, retries/backoff, and circuit breakers for reliability

3. AI/ML & Data Science:
• Generative AI; LLMs GPT 4/5, LLaMA, Claude, Gemini, Mistral; RAG / Graph RAG; Transformer architectures; agentic & multi agent systems
• NLP, OCR/KIE, text detection; Computer Vision YOLOv7, CRNN, CNNs, image