Full Stack Developer

Senior Full Stack Engineer

Experienced and highly skilled Senior Full Stack Developer with strong proficiency in Node.js and Python for building scalable, end-to-end web and fintech applications. Expertise in microservices architecture, API development, and cloud-native solutions. Skilled in blockchain technology, including developing decentralized applications (dApps), smart contracts, and secure trading bot systems for algorithmic trading. Hands-on experience in Artificial Intelligence and Machine Learning, with a focus on Retrieval-Augmented Generation (RAG) applications, natural language processing, and deep learning models. Proven ability to design efficient, reusable systems and collaborate across teams to deliver innovative, high-quality solutions in fast-paced fintech and emerging technology domains.

Experience: 11 years

Yearly salary: $50,000

Hourly rate: $25

Nationality: 🇯🇵 Japan

Residency: 🇯🇵 Japan

Experience

Senior Full Stack Engineer

1KinLabs

2021 - 2023

● Led full-stack development for Web3 gaming infrastructure, building decentralized user dashboards and NFT-enabled ecosystems. ● Designed smart contract integrations using Solidity, Web3.js, and Ethers.js, enabling secure player transactions and in-game asset ownership. ● Architected API and microservices connecting multiple blockchain networks (Polygon, Solana, Avalanche) to the GR1D platform. ● Developed scalable backend systems in Node.js and Express, with GraphQL APIs to power Web3 user authentication and analytics. ● Collaborated with cross-functional teams on wallet integration and real-time player tracking, enhancing retention and engagement metrics.

Full Stack Engineer

InfoTrack

2020 - 2021

● Developed and maintained enterprise-level applications supporting property and legal data automation for large Australian clients. ● Built microservice architectures to handle high-volume search requests and document verification workflows using Python (FastAPI) and Node.js. ● Improved backend response times by 40% through query optimization, caching strategies, and asynchronous data pipelines. ● Integrated secure identity verification (VOI) and eConveyancing APIs into client-facing web portals. ● Contributed to internal tools that enhanced compliance and data quality across multiple business units.

Full Stack Engineer

ShowRoom

2015 - 2020

● Built and maintained scalable live-streaming and fan-engagement platforms used by millions of users. ● Implemented real-time features (chat, live comments, gifting systems) using WebSocket and Redis Pub/Sub for high-concurrency environments. ● Designed RESTful APIs and backend services to support video metadata, user management, and monetization workflows. ● Developed front-end components in React and Next.js for dashboards and content moderation tools. ● Collaborated with cross-functional teams on data visualization, performance optimization, and system scalability for live events.

Skills

aws

dart

docker

golang

kubernetes

metaverse

nestjs

nosql

openzeppelin

php

prompt

python

solidity

sql

tailwind

web3js

full-stack

english

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