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

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.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
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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.

Education

Bachelor's degree at Waseda University
January 11, 2030 - January 1, 2016

Qualifications

Anthropic Prompt Engineering — Interactive Tutorial
January 11, 2030 - January 1, 2024
AWS Certified Solutions Architect – Associate
January 11, 2030 - January 1, 2021
Front-End Web Developer Nanodegree
January 11, 2030 - January 1, 2020

Industry Experience

Software & Internet, Media & Entertainment