I’m a full-stack engineer with nearly 10 years of commercial experience building end-to-end web systems, with a strong focus on real-time applications and modern AI tooling. I’m comfortable turning product requirements into maintainable architectures—handling synchronization, performance, load, failure modes, and designing for future extension. I’ve built multiplayer, browser-based experiences using technologies like React, Three.js, WebRTC, and real-time backend services, and I’ve also worked on LLM/agent workflows including evaluation and regression testing. I enjoy connecting reliable backend APIs with responsive front-end experiences, while keeping systems observable and production-ready.…

Leonid Golosovker

I’m a full-stack engineer with nearly 10 years of commercial experience building end-to-end web systems, with a strong focus on real-time applications and modern AI tooling. I’m comfortable turning product requirements into maintainable architectures—handling synchronization, performance, load, failure modes, and designing for future extension. I’ve built multiplayer, browser-based experiences using technologies like React, Three.js, WebRTC, and real-time backend services, and I’ve also worked on LLM/agent workflows including evaluation and regression testing. I enjoy connecting reliable backend APIs with responsive front-end experiences, while keeping systems observable and production-ready.…

Available to hire

I’m a full-stack engineer with nearly 10 years of commercial experience building end-to-end web systems, with a strong focus on real-time applications and modern AI tooling. I’m comfortable turning product requirements into maintainable architectures—handling synchronization, performance, load, failure modes, and designing for future extension.

I’ve built multiplayer, browser-based experiences using technologies like React, Three.js, WebRTC, and real-time backend services, and I’ve also worked on LLM/agent workflows including evaluation and regression testing. I enjoy connecting reliable backend APIs with responsive front-end experiences, while keeping systems observable and production-ready.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
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Language

Aragonese
Advanced

Work Experience

Full-Stack Developer at re-motivator.com
February 1, 2023 - September 1, 2026
Built a browser-based multiplayer game engine using React, Three.js, and cannon-es on the front end, with AWS on the back end. Implemented synchronized physics and media/voice features powered by media server technology, and designed server-side workload distribution for live multiplayer sessions. Supported team-building games and virtual meetings, including real-time operation with up to ~100 concurrent users on the production platform, while maintaining stability under real-time constraints.
Full-Stack Developer at remote team building.io
April 1, 2021 - September 1, 2023
Developed a browser-based multiplayer game to bring escape room experiences online. Created a game builder and admin dashboard for monitoring live sessions and delivering hints to players. Integrated WebRTC voice chat into gameplay, and supported live events with ~100–300 concurrent users in one world/game. Used a full-stack setup including React/Three.js and Next.js with PostgreSQL plus Kafka for event/data flow.
Full-Stack Developer at INITI, Moscow
October 1, 2016 - April 1, 2021
Designed and built a domain-specific language and engine for user-defined dashboards displaying frequently updated monitoring data. Implemented a Node.js reporting module that generated network device status reports directly from dashboard definitions without separate reporting configuration. Optimized rendering and data processing for large, frequently updated monitoring interfaces.
Full-Stack Developer at INITI
October 1, 2016 - April 1, 2021
Designed and built a domain-specific language and engine for user-defined dashboards displaying frequently updated monitoring data. Built a Node.js reporting module that generated network device status reports directly from dashboard definitions without separate report configuration. Optimized rendering and data processing for large, frequently updated monitoring interfaces, improving responsiveness for operational use.

Education

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Qualifications

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Industry Experience

Gaming, Software & Internet, Computers & Electronics, Media & Entertainment