danqha0 / CV
Nguyen Dang Hao
Full-stack Developer
Profile
Full-stack Software Engineer with proven expertise in building resilient production web systems, cloud infrastructure (AWS), and Blockchain engineering. Core blockchain background includes smart contract development (Solidity), ERC-4337 Account Abstraction architectures, multichain EVM event synchronization, and cross-chain execution flows. On the web and platform side: experienced in responsive interfaces, scalable REST/GraphQL APIs, asynchronous background workers, database optimization (PostgreSQL, MongoDB, Redis), and containerized deployments on AWS, Docker, and Linux. Additional expertise includes Linux endpoint Data Loss Prevention (DLP) and LLM evaluation workflows.
Experience
Full-stack Developer
Zinza Technology · Full-time · Hanoi, Vietnam
- Build and maintain scalable production web applications across responsive frontends and high-availability backend services.
- Design RESTful APIs and asynchronous background workers; optimize PostgreSQL/MongoDB queries and Redis caching, and deploy/operate services on AWS and Docker.
- Architect, deploy, and test smart contracts (Solidity) across EVM-compatible multichain networks with a focus on security and gas optimization.
- Implement ERC-4337 Account Abstraction workflows (gasless transactions, smart contract wallets) and build real-time on-chain event indexing pipelines.
- Engineer Linux endpoint Data Loss Prevention (DLP) solutions featuring policy enforcement, sensitive content inspection, and network traffic control.
- Evaluate AI models (LLM Evaluation) through systematic prompt engineering, rigorous testing, failure analysis, and structured feedback loops.
JavaScript Developer
Zinza Technology · Internship · Hanoi, Vietnam
- Built interactive frontend modules in React.js and RESTful API endpoints in Node.js, contributing to code reviews, testing, and feature delivery prior to full-time conversion.
Unity 2D Developer
HN Technology · Part-time & Internship · Hanoi, Vietnam
- Developed 2D gameplay systems and interactive features in Unity (C#), implementing character controllers, 2D physics, UI workflows, and scene state management in collaboration with game designers and the technical lead.
Software Developer
Sellclone · Part-time · Hanoi, Vietnam
- Designed and built Android and web automation tools to streamline device interaction workflows and automated data processing.
- Maintained internal web applications with a focus on operational stability and security, while providing direct technical support to end users.