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I'm a senior full-stack web & AI engineer with five years of experience, leading design and development of projects like StudioBots, VIPTalkers, BitWizard, and Peracel. I bridge frontend and backend work using JavaScript, TypeScript, Python, Rust, and modern frameworks to deliver scalable, user-centric products. I’m passionate about UI/UX design, accessibility, and AI-powered workflows. I collaborate closely with product and design teams to translate wireframes into polished interfaces, implement robust backends, and refine AI interactions using OpenAI APIs and retrieval-augmented generation to keep responses accurate and grounded in real documentation.…I'm a senior full-stack web & AI engineer with five years of experience, leading design and development of projects like StudioBots, VIPTalkers, BitWizard, and Peracel. I bridge frontend and backend work using JavaScript, TypeScript, Python, Rust, and modern frameworks to deliver scalable, user-centric products. I’m passionate about UI/UX design, accessibility, and AI-powered workflows. I collaborate closely with product and design teams to translate wireframes into polished interfaces, implement robust backends, and refine AI interactions using OpenAI APIs and retrieval-augmented generation to keep responses accurate and grounded in real documentation.

Tanaka Haruto

Full Stack Developer, AI Developer, UI Designer, +1

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I'm a senior full-stack web & AI engineer with five years of experience, leading design and development of projects like StudioBots, VIPTalkers, BitWizard, and Peracel. I bridge frontend and backend work using JavaScript, TypeScript, Python, Rust, and modern frameworks to deliver scalable, user-centric products. I’m passionate about UI/UX design, accessibility, and AI-powered workflows. I collaborate closely with product and design teams to translate wireframes into polished interfaces, implement robust backends, and refine AI interactions using OpenAI APIs and retrieval-augmented generation to keep responses accurate and grounded in real documentation.…I'm a senior full-stack web & AI engineer with five years of experience, leading design and development of projects like StudioBots, VIPTalkers, BitWizard, and Peracel. I bridge frontend and backend work using JavaScript, TypeScript, Python, Rust, and modern frameworks to deliver scalable, user-centric products. I’m passionate about UI/UX design, accessibility, and AI-powered workflows. I collaborate closely with product and design teams to translate wireframes into polished interfaces, implement robust backends, and refine AI interactions using OpenAI APIs and retrieval-augmented generation to keep responses accurate and grounded in real documentation.

Available to hire

I’m a senior full-stack web & AI engineer with five years of experience, leading design and development of projects like StudioBots, VIPTalkers, BitWizard, and Peracel. I bridge frontend and backend work using JavaScript, TypeScript, Python, Rust, and modern frameworks to deliver scalable, user-centric products.

I’m passionate about UI/UX design, accessibility, and AI-powered workflows. I collaborate closely with product and design teams to translate wireframes into polished interfaces, implement robust backends, and refine AI interactions using OpenAI APIs and retrieval-augmented generation to keep responses accurate and grounded in real documentation.

Skills

Experience Level

Expert

Expert

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Language

English

Advanced

Japanese

Fluent

Work Experience

Full stack | AI Developer at Kapa.ai

March 1, 2025 - March 1, 2025

Joined Kapa.ai mid-development phase as a full-stack and AI developer contractor, delivering impactful contributions. Implemented new functionalities and refined AI workflows, significantly improving the accuracy and relevance of response generation. Developed and maintained core components using Python for backend AI processing and React for frontend interfaces, leveraging OpenAI API for language model integration. Improved retrieval-augmented generation (RAG) workflows to ensure contextually accurate AI responses, and integrated multi-channel support (Slack, Discord, Zendesk). Implemented secure coding practices to align with SOC 2 Type II standards and automated data masking. Streamlined AI interaction flows to reduce ticket volume and accelerate resolution times.

Full stack | AI Developer at VIPTalker Online Teaching LLC

March 1, 2025 - March 1, 2025

Developed and launched VIPTalkers and KidzRup, innovative online language education platforms leveraging MERN stack and Next.js. Architected scalable backend services and dynamic frontend components to support real-time language lessons, adaptive practice modules, and integrated payments. Implemented responsive design and accessibility-first practices to maximize performance across devices. Collaborated with design and product teams to translate UI/UX wireframes into production features, and conducted rigorous testing within Agile workflows.

UI/UX Designer (Part-time) at VIPTalker Online Teaching LLC

August 1, 2022 - August 1, 2022

Created intuitive, high-fidelity prototypes in Figma, led user testing sessions, and iteratively refined key flows. Achieved a 28% reduction in course drop-off rates and improved learner retention. Focused on clear navigation, visual hierarchy, and accessibility to deliver a more interactive and inclusive learning experience. Collaborated with cross-functional teams to ensure design objectives were reflected in production features and backend integration.

Frontend developer at Remote Staff

October 1, 2020 - February 11, 2021

Contributed to the development of web applications using the MERN stack and TypeScript, enhancing user experience through responsive design and seamless API integration. Worked within an Agile remote team to align frontend and backend efforts with project goals, mentored junior developers, and supported ongoing professional growth.

Education

Bachelor’s Degree in Computer Science at Hokkaido University

August 1, 2014 - April 1, 2019

I graduated from the Hokkaido University with a Bachelor's degree in Computer Science. During my studies, I gained a solid foundation in programming, algorithms, and software development, equipping me with the skills necessary for a successful career in technology.