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A senior Full-Stack Developer who has been doing over 10 years - architecting and delivering high-quality, scalable applications using AI, Node.js, Python, .NET and Javascript/Typescript. Dedicated to best practices, performance optimization, and integrating latest AI throughputs with a great passion and research grounded by vast experience. Recently actions performed in leveraging Prompt Engineering, RAG, Fine-tuning over those LLMs - Huggingface LLMs, tools(llama.cpp, vllama), Chatgpt gpt4-o to bring businesses and customers AI-powered tech solutions – like customized chatbot and AI-integrated products like AI voice assistant.…A senior Full-Stack Developer who has been doing over 10 years - architecting and delivering high-quality, scalable applications using AI, Node.js, Python, .NET and Javascript/Typescript. Dedicated to best practices, performance optimization, and integrating latest AI throughputs with a great passion and research grounded by vast experience. Recently actions performed in leveraging Prompt Engineering, RAG, Fine-tuning over those LLMs - Huggingface LLMs, tools(llama.cpp, vllama), Chatgpt gpt4-o to bring businesses and customers AI-powered tech solutions – like customized chatbot and AI-integrated products like AI voice assistant.

Fujisawa Tadoru

AI Engineer, AI Developer, App Developer, +6

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A senior Full-Stack Developer who has been doing over 10 years - architecting and delivering high-quality, scalable applications using AI, Node.js, Python, .NET and Javascript/Typescript. Dedicated to best practices, performance optimization, and integrating latest AI throughputs with a great passion and research grounded by vast experience. Recently actions performed in leveraging Prompt Engineering, RAG, Fine-tuning over those LLMs - Huggingface LLMs, tools(llama.cpp, vllama), Chatgpt gpt4-o to bring businesses and customers AI-powered tech solutions – like customized chatbot and AI-integrated products like AI voice assistant.…A senior Full-Stack Developer who has been doing over 10 years - architecting and delivering high-quality, scalable applications using AI, Node.js, Python, .NET and Javascript/Typescript. Dedicated to best practices, performance optimization, and integrating latest AI throughputs with a great passion and research grounded by vast experience. Recently actions performed in leveraging Prompt Engineering, RAG, Fine-tuning over those LLMs - Huggingface LLMs, tools(llama.cpp, vllama), Chatgpt gpt4-o to bring businesses and customers AI-powered tech solutions – like customized chatbot and AI-integrated products like AI voice assistant.

Available to hire

A senior Full-Stack Developer who has been doing over 10 years - architecting and delivering high-quality, scalable applications using AI, Node.js, Python, .NET and Javascript/Typescript.

Dedicated to best practices, performance optimization, and integrating latest AI throughputs with a great passion and research grounded by vast experience.

Recently actions performed in leveraging Prompt Engineering, RAG, Fine-tuning over those LLMs - Huggingface LLMs, tools(llama.cpp, vllama), Chatgpt gpt4-o to bring businesses and customers AI-powered tech solutions – like customized chatbot and AI-integrated products like AI voice assistant.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Work Experience

Technical Architect at West Coast Realty

August 1, 2020 - December 1, 2025

Architected microservice-based solutions leveraging AI-powered technologies (OpenAI Realtime API, Twilio Media Streams, WebSocket); designed low-latency streaming, natural barge-in, silence detection, sentiment analysis, memory orchestration (short-term/long-term), session management per call; built RAG pipelines (ingest, chunking, embeddings, vector DB, retrieval) grounded on company-specific knowledge; guided architecture for LLM/RAG infra; performed performance tuning and refactoring to reduce latency and improve throughput; produced design docs and roadmaps; evaluated new technologies and tools.

Senior Software Developer at Rikkeisoft

August 1, 2017 - September 1, 2020

Built scalable, secure web solutions using C#, ASP.NET Core, React; leveraged Entity Framework Core; collaborated with design team to translate wireframes; managed SQL Server and CouchDB; integrated Google Maps SDK for real-time location tracking; implemented unit/integration tests; set up CI/CD with GitHub Actions, Docker, AWS Fargate, S3/CloudFront; developed AI processing pipeline using AWS Lambda for transcription, data analysis, and content generation; created and refined prompts for LLM automation; built a ChatGPT-like web frontend for intelligent insights and automation.

Software Developer at Mizuho Bank

October 1, 2015 - July 1, 2017

Collaborated across teams to build scalable web apps using React/Node.js; translated Figma designs into accessible UI; designed GraphQL schemas for user profiles, payments, and policy search; implemented GraphQL for state synchronization; optimized PostgreSQL with indexing and caching; built HIPAA-compliant APIs ensuring data integrity and privacy; improved team efficiency through standardized workflows.

Software Engineer at Canon Marketing Japan Inc.

April 1, 2013 - September 1, 2015

Led full-stack development of cross-platform mobile apps (iOS/Android) using Swift, Objective-C, and Java; integrated Firebase for real-time storage and push notifications; engineered a photo gallery with iCloud sync and advanced caching; architected PHP apps with Laravel, Zend, CodeIgniter; frontend with React/TypeScript; built dynamic visualizations (heatmaps, KPIs) with Recharts/Chart.js; developed backend APIs (PHP/Laravel); implemented Live video conferencing with WebRTC; deployed on AWS; practiced Agile SDLC.