Looking for a job

Alex User

@alexuser103

Message

Full-stack developer at Circle who built a blockchain payment system and developed a social community app.

Vietnam

Message

What I'm looking for

I'm interested in applying LLMs, RAG, and agentic workflows to real-world problems while continuing to grow as a full-stack developer.

At Circle, I built a blockchain payment application using Rust and PostgreSQL, developing REST APIs for payments, deposits, withdrawals, wallets, transaction history, and authentication.

I also developed both frontend and backend features for a social community app using Next.js and Go, including post suggestions, UI improvements, and notifications.

At Sellde, I developed web and mobile applications for a cosmetics e-commerce platform and contributed to its Node.js APIs. I also led a team of four building and maintaining features for the e-commerce website and mobile application. My personal projects include hands-on work with LLMs, RAG, and agentic workflows.

Experience

Work history, roles, and key accomplishments

Full-Stack Developer — Rust / Go / Next.js

Circle

Aug 2025 - Aug 2026 (1 year)

Project: Blockchain Payment System
• Built a payment application using Rust and PostgreSQL, developing REST APIs for payment, deposit, withdrawal, wallet/balance, transaction history, and authentication, with blockchain-related functionality provided through internal APIs.
• Designed and implemented the PostgreSQL database structure for the payment system.

Project: Social Community App
• Deve

Full-Stack Developer — Vue.js / Node.js

Sellde

Mar 2022 - Aug 2024 (2 years 5 months)

Project: Cosmetics E-commerce Platform
• Developed web and mobile applications using Vue.js and Vue Native for a cosmetics e-commerce platform, including product listings, promotions, rankings, and order placement.
• Integrated frontend applications with backend APIs and contributed to API development using Node.js.
• Used SQL to generate reports for sales, merchandising, and operations teams.

Frontend Developer — React.js / React Native

Meete.co

May 2020 - Jun 2021 (1 year 1 month)

Project: Promotion & Coupon Sharing Platform
• Developing mobile/web UI using React Native and React.js
• Integrating with backend APIs
• Optimizing codebase using Custom Hooks, HOC, and React-Redux
• Developing APIs using Python and Node.js