Narita

Daiki

I worked at a small Tokyo-based blockchain startup, SakuraTech Labs, assisting in the design and deployment of proof-of-concept DApps and learning core blockchain patterns such as API integration and Solidity contract deployment. And I Improved development workflows by contributing to documentation and version control procedures, making handovers smoother and more consistent.

Developed and maintained full-stack blockchain applications with a focus on responsive UI/UX, smart contract integration, and performance optimization. Built and maintained RESTful APIs and backend services supporting decentralized applications, ensuring scalability, reliability, and low-latency data access. Collaborated with product teams to design user-friendly dashboards for token management, transaction tracking, and contract analytics. Improved DApp load times and responsiveness by optimizing API calls, caching strategies, and frontend rendering workflows. Wrote unit and integration tests for both backend services and smart contracts, achieving over 90% code coverage and reducing post-deployment bugs.

Designed and deployed a scalable microservice-based architecture for a multi-tenant blockchain analytics platform, featuring database sharding, containerized services, and API gateway optimization. Developed and audited production-grade smart contracts for token issuance, NFT minting, and DeFi integrations using Solidity, Hardhat, and OpenZeppelin standards. Integrated Stripe and cryptocurrency payment solutions into SaaS dashboards, ensuring PCI compliance, secure transaction flows, and seamless user experience. Led code reviews, pair programming, and technical mentorship to enhance security, maintainability, and onboarding efficiency across engineering teams.