WhereBoldVisionsMeetCode

Welcome! I'm Yohanes Willy Agusta

I'm a FullStack Developer and Performance Marketing Specialist with a deep passion for Web3 and the decentralized future. I transform bold, forward-thinking ideas into secure, transparent digital experiences—whether it's building complete web applications, architecting smart contract ecosystems, or driving growth through data-driven marketing strategies.

Discover My Projects

The Core of My Codebase

Where I Deliver Value

Development Services

Developer working on code with multiple monitors

FullStack Developer

I build complete web applications from the ground up with React, TypeScript, and JavaScript, to setting up the engine behind it all with Node.js and Express.js. I handle the whole package, making sure it's solid and easy to use.

Blockchain and cryptocurrency visualization

Smart Contract / Web3 Developer

When it comes to blockchain and building decentralized applications, I write the core smart contracts in Solidity that is integrated to the user interface. I aim to ease people to use them, whether it's for something new in DeFi, DAO, or NFT.

Performance Marketing Services

Performance Marketing

With 5+ years of experience, I specialize in data-driven performance marketing that delivers measurable ROI. I optimize campaigns across paid channels, build conversion funnels, and use analytics to continuously improve results. My technical background allows me to set up advanced tracking, attribution models, and marketing automation systems.

Data Analytics & Growth

I combine technical expertise with marketing analytics to turn data into actionable insights. From setting up comprehensive tracking systems to analyzing user behavior and conversion patterns, I help businesses understand what's working and optimize for growth. My full-stack knowledge enables me to implement custom analytics solutions that go beyond standard tools.

Why Hire Me?

Expertise Across Technologies

With experience across frontend, backend, and Web3 technologies, I'm equipped to handle the full stack of modern web and blockchain development. I build scalable applications that are not only high-performing and user-centric but also follow security best practices, from smart contract auditing patterns to secure authentication and data handling.

Focus on User Experience

I design websites that not only look great and function intuitively but are also Web3-ready-integrating wallet connections, on-chain interactions, and decentralized features. Every interface is crafted with both usability and security in mind, ensuring a smooth and trustworthy experience for your users.

On-Time Delivery

I ensure Web2 and Web3 projects are delivered on schedule without compromising on quality or security, so whether you're launching a traditional website, a dApp, or a smart contract platform, you can move forward confidently and on time.