- I have expertise in the following program languages and systems: Golang, Python, Cosmos Sdk, Starport, Solidty, Hyperledger Fabric, Rasa, Kafka, docker, grpc, AWS - My experience includes

Blockchain / Backend Engineer | Wildfireart (Freelance)

Jul 2025 - Dec 2025 · Remote (US)

Restored a failed blockchain service and fixed critical backend issues in Node.js/Ethereum system
Rebuilt architecture and stabilized production deployment
Backend Engineer | Gettr (Freelance)

May 2025 - Jun 2025 · Remote (China)

Built real-time chat system using Go and Redis Pub/Sub
Implemented SSE streaming for live message delivery
Backend Engineer | Neural Internet (Freelance)

Dec 2024 - Mar 2025 · Remote (US)

Built REST API for user system in Python
Integrated decentralized AI (Bittensor) and deployed on GCP
Backend Engineer | Bnei Baruch (Freelance)

Aug 2022 - Jul 2024 · Remote (Israel)

Developed backend for education platform
Built course, enrollment, and video streaming integrations (Zoom, YouTube)
Backend / Blockchain Engineer | INOVBE INC

May 2024 - Jun 2024 · Remote (Canada)

Built token trading backend system
Implemented wallet and transaction services
Backend Engineer | FullThrottle (Freelance)

Feb 2023 - Nov 2023 · Remote (Sweden)

Built YouTube management backend using Go and gRPC
Implemented video processing and streaming workflows
Backend Engineer | Park Loyalty Inc (Freelance)

Sep 2022 - Nov 2022 · Remote (US)

Built payment backend system
Integrated Authorize.net and Heartland APIs
Backend / Blockchain Engineer | VegaX Holdings

Mar 2021 - Aug 2022 · Remote (South Korea)

Built blockchain network and token swap system
Maintained backend infrastructure
Backend Engineer | Clean.Tech

Aug 2020 - Mar 2021 · Remote (US)

Maintained backend services and GCP infrastructure
Built Telegram bot for automation
Backend / Blockchain Developer | MyCreditChain

Aug 2017 - Aug 2020 · South Korea

Built blockchain-based credit system
Developed token and AWS infrastructure systems
Backend Engineer | Yonego

Jan 2017 - Jun 2017 · Netherlands

Migrated PHP backend to Golang
Backend Engineer | ANX International

Jul 2016 - Sep 2016 · Hong Kong

Maintained backend systems
Backend Engineer | Chaatz

Feb 2015 - Feb 2016 · Hong Kong

Built messaging backend and ERP system
Full-stack Developer | Lionbridge

Mar 2014 - Dec 2014 · South Korea

Built CMS and workflow automation tools
Full-stack Developer | Computer Architechs Intl

Jul 2012 - Dec 2013 · USA

Developed web and mobile applications
Full-stack Developer | KT Capital

Dec 2010 - Sep 2011 · South Korea

Built internal ERP system

Work Terms

Freelancer 30-40 hr / week