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Full-stack developer

Han Yi

Full-stack engineer who builds scalable products with great user experience.

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Profile

About

I ship products that hold up under pressure. My work spans Web2 and Web3 serving thousands and millions of users.

Role

Full-Stack Developer

Location

Singapore

Focus

Scalability + User Experience

TypeScriptReactNext.jsNode.jsSolanaTailwind CSSPostgreSQLCloudflare

Experience

Past Work + Major Projects

2024 - Presentwork

Full-Stack Engineer · Jupiter Exchange

Building production-grade blockchain products focused on scale, safety, and launch execution.

  • • Built and launched Jupiter Studio for Solana community token launches with bonding curves, vesting schedules, anti-sniper protection, and dedicated token pages.
  • • Designed, architected and shipped Jupuary 2025, scaling claim infrastructure and safeguards for 500K+ peak concurrent users.
  • • Developed Jupiter Verify, a multi-layered token verification system combining algorithmic checks with community signals to help users assess token trust across 30K+ daily new Solana tokens.
  • • Collaborated across product, design, and infra to deliver reliable campaign and launch experiences under heavy traffic.
Next.jsTypeScriptTailwindSolana
2022 - 2024work

Full-Stack Engineer · SolanaFM

Built explorer interfaces to make blockchain data understandable and fast to navigate.

  • • Pioneered the development of the client-side for a blockchain explorer with 1M monthly users using NextJS. Leveraged innovative solutions to create a responsive and user-friendly interface, providing seamless exploration and interaction with blockchain data.
  • • Developed high-performance Rust indexers for the Solana Blockchain, significantly enhancing data retrieval and processing efficiency.
  • • Engineered robust API services using Axum to seamlessly deliver extensive data to clients, enhancing user experiences and data accessibility.
ReactNext.jsTypeScriptSolana
2020project

Freelance Developer · S L A T E . bakery

Designed and delivered an e-commerce site for a home bakery business.

  • • Set up a minimal storefront and core purchase journey.
  • • Configured CMS workflows for non-technical content updates.
WordPressWooCommerce
2020project

Mobile Developer · Onboard!

Built a gamified Android onboarding app during remote-first onboarding periods.

  • • Implemented app experience with Kotlin and Firebase.
  • • Integrated cloud services for media and data workflows.
KotlinFirebaseAndroid
2019 - 2020project

Full-Stack Developer · Living Lab Dashboard

Contributed to smart-building monitoring and control software in a large team setting.

  • • Built dashboard modules for monitoring and operations.
  • • Worked within a multi-team integration workflow.
ASP.NET CoreTailwindSystem Design
2019project

Co-Creator · SIT Confessions

Created a social confessions platform with moderation and automated publishing flows.

  • • Built web app and admin moderation pipeline.
  • • Automated scheduled publishing through integration scripts.
MERNFacebook APICron

Projects

Selected Builds

Jupiter Studio

2025

Open

Built and designed Jupiter Studio, Jupiter's creator suite for launching Solana community tokens with configurable bonding curves, vesting schedules, anti-sniper protection, and dedicated token pages integrated into the Jupiter ecosystem.

Next.jsTypeScriptSolanaTailwind

Jupuary 2025

2025

Open

My first major project at Jupiter Exchange. I helped architect, build and launch Jupuary 2025, Jupiter's annual community airdrop, scaling claim infrastructure and safeguards to support 500K+ peak concurrent users during one of Solana's largest token distribution events.

Next.jsTypeScriptSolanaTailwind

SolanaFM

2024

Open

Built and iterated on blockchain explorer UX for transactions, blocks, and accounts with performance-focused interfaces.

ReactNext.jsTypeScriptSolana

Food Canopy Bukit Canberra

2022

Built and designed digital payment system for Food Canopy Bukit Canberra hawker centre.

Next.jsTypeScriptTailwind

S L A T E . bakery

2020

Developed a minimal e-commerce site for a home bakery, focused on straightforward purchase flow and content updates.

WordPressWooCommerce

Onboard!

2020

Open

Created a gamified Android onboarding app with Firebase-backed workflows for remote-first onboarding.

KotlinFirebaseAndroid

Black Mamba

2019

Open

Built a multiplayer snake game in Java and later refactored into C++ with gameplay and performance improvements.

JavaC++

Contact

Feel free to reach out.