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Senior full-stack engineer with 9+ years across React, Node.js, and Python, lately focused on real-time AI video and voice systems built on WebRTC and modern LLM stacks. Comfortable owning the whole loop from low-latency media plumbing to chat UX with typing animations, streamed responses, and inline AI-generated imagery.…

Jakub Yamamoto

Full Stack Developer, Web Developer, Programmer, +2

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Senior full-stack engineer with 9+ years across React, Node.js, and Python, lately focused on real-time AI video and voice systems built on WebRTC and modern LLM stacks. Comfortable owning the whole loop from low-latency media plumbing to chat UX with typing animations, streamed responses, and inline AI-generated imagery.…

Available to hire

Senior full-stack engineer with 9+ years across React, Node.js, and Python, lately focused on real-time AI video and voice systems built on WebRTC and modern LLM stacks.

Comfortable owning the whole loop from low-latency media plumbing to chat UX with typing animations, streamed responses, and inline AI-generated imagery.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Polish

Advanced

Work Experience

Senior Software Engineer at Aptagon Tech, Dorset

January 1, 2024 - Present

Architected and shipped VeraTalk, a real-time AI video conversation platform built with React and Node.js. Implemented WebRTC signaling, adaptive bitrate, and a lip-sync avatar workflow, targeting sub-300ms end-to-end latency and stable performance on flaky mobile networks.

Senior Software Engineer at Fujitsu, Warsaw

December 1, 2018 - January 1, 2024

Led full-stack development on GlobeServiceDesk, a React and Node.js platform with WebRTC-based agent–customer video sessions. Built real-time messaging over WebSockets and Redis pub/sub, achieving responsive chat and session resumption with improved latency and CSAT.

Software Engineer at Rikkeisoft, Fukuoka

September 1, 2016 - October 1, 2018

Contributed to KaizenFlow, a Node.js and React platform for Japanese manufacturing clients. Implemented REST APIs and WebSocket services handling ~1.2M events per day, and developed operator dashboard components with significantly faster page loads.