sepanyol - Overview

Hi, I’m Daniel Ceballos πŸ‘‹

Full Stack Engineer

πŸ”— Website


🧱 About Me

I'm a passionate software engineer with 15+ years of experience – and since 2022, fully immersed in the world of Web3.

In recent years, I've focused on smart contract development, decentralized architectures, and cross-chain ecosystems. I thrive at the intersection of code quality, security, and innovation.


⚑ What I’m Doing in Web3

πŸš€ Solidity Development

I design and implement secure and optimized smart contracts with:

  • Solidity, Foundry, Hardhat
  • OpenZeppelin & Solidstate
  • Static code analysis (Slither)

πŸ”’ Smart Contract Security

Security first! My contracts are:

  • Covered with 100% test coverage
  • Audited with Slither & external audits
  • Monitored using Tenderly

πŸŒ‰ Cross-Chain & Interoperability

Working on projects using:

  • Chainlink CCIP
  • Celer cBridge & Interchain Messaging

πŸ› οΈ Core Web3 Tech Stack

  • Solidity, Foundry, Hardhat, Tenderly
  • OpenZeppelin, Slither, Chainlink CCIP, Celer IM
  • TypeScript, React, Next.js, Node.js
  • Docker, CI/CD, GitHub Workflows

πŸ’‘ Next Goals in Web3

  • Dive deeper into Zero-Knowledge Proofs (ZKPs)
  • Explore, utilize and leverage Account Abstraction (ERC-4337)
  • Improve Web3 UX and onboarding experiences

πŸš€ Project: yieldz.cc – A Platform for Single-Sided Staking

I'm a main contributor to yieldz.cc. It's a decentralized platform that allows users to earn yield with just a single token. No LPs, no impermanent loss, no unnecessary complexity – just clean, simple staking. Designed for everyone from DeFi beginners to seasoned crypto users.

πŸ”§ Responsibilities

  • Product Design
    Developed the concept for a secure and easy-to-use staking platform focused on single-sided staking – no LP tokens, no impermanent loss.

  • Smart Contract Development
    Developed and deployed all smart contracts using Solidity, with a focus on security and extensibility.

  • Frontend Development
    Built a user-friendly interface with React, Next.js, and Connectkit (viem), including seamless Web3 wallet integrations.

  • Backend & Infrastructure
    Designed and implemented backend architecture using Node.js, Express and subgraphs, with on-chain data handling and performance monitoring.

  • Security & Audits
    Led the smart contract audit process and collaborated with external auditors to ensure contract safety and protocol robustness.

  • Go-to-Market Strategy
    Launched the platform, defined the brand identity, and built the early adopter community from the ground up.


πŸ“« Let’s Connect

I'm always open to chat about smart contract security, Web3 architecture, and the future of decentralized systems.

Feel free to connect or reach out!