Santiago Palladino
 Verified
  • @spalladino
  • Ethereum developer
  • Ciudad de Buenos Aires, Argentina
  • He/Him

Hey there! I'm Santiago, a developer in Buenos Aires, Argentina. I have been happily coding for a living for over 18 years.


I am a software engineer at Aztec, working on Aztec3. I have been focusing on Ethereum since 2017, when I joined OpenZeppelin to develop secure building blocks for blockchain applications, until end of 2022. At the moment I also work as a councilmember for The Graph, and a technical mentor at Zeitgest.


I wrote the book Ethereum for Web Developers in 2019, and keep generating content for onboarding devs to the web3 space.

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Resume

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Mar 2023 - Present

Software Engineer, Aztec Protocol

Oct 2022 - Feb 2023

Happily Unemployed, None

Jul 2017 - Sep 2022

Director of Development & Security Researcher, OpenZeppelin

Apr 2008 - Jun 2017

Lead Developer & Tech Project Manager, Manas.Tech

Timeline

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2023

  1. 02 Oct, 2023
    02 Oct, 2023
    Judge on Based Accounts

    Judged the projects submitted to Based Accounts, a retroactive funding contest for account abstraction projects built on or related to Base, Coinbase's L2.

    https://prop.house/base/based-accounts

    


    
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2022

  1. 06 Dec, 2022
    06 Dec, 2022
    Guest at DeFi Wonderland podcast
    Spoke at a podcast
    Guest at DeFi Wonderland's internal podcast, where we discussed operational security, open source development, smart contract engineering, and more.

    https://twitter.com/DeFi_Wonderland/status/1602271584836026369/
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  2. 12 Oct, 2022
    12 Oct, 2022
    So, what's next?
    Spoke at an event
    Spoke in a panel in Bogotá about security in Ethereum after the Merge, with Mudit Gupta, Gonçalo Sa, and Eskil.eth. Organized by GoPlus and Salus security.
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  3. 25 May, 2022
    25 May, 2022
    Intro to Smart Contracts at ORT University
    Spoke at an event
    Gave a remote talk Introduction to Smart Contracts and Token Standards at the Blockchain 2022 cycle in University ORT Uruguay.

    https://twitter.com/UniversidadORT/status/1529479478237229056
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Talks & Workshops

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2022

  1. 13 Oct, 2022
    13 Oct, 2022
    Verify, don't trust!
    Spoke at a conference
    I presented a lightning talk at Devcon VI titled "Verify, don't trust" on the tools available for being a responsible multisig signer.

    https://www.youtube.com/watch?v=YKGNcQXtMhg
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  2. 12 Aug, 2022
    12 Aug, 2022
    Building the infrastructure for secure web3 operations at EthLatam
    Spoke at a conference
    Gave a talk on Building the infrastructure for secure web3 operations at EthLatam in Buenos Aires, on the challenges to overcome specific to web3 devsecops, based on the learning from building OpenZeppelin Defender.

    https://www.youtube.com/watch?v=8LUWWuJriD4
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2021

  1. 27 Sep, 2021
    27 Sep, 2021
    Secure development and Operations with OpenZeppelin
    Spoke at an event
    Presented Secure development and Operations with OpenZeppelin, an overview of tools and libraries for secure smart contract development and operations we build at OpenZeppelin, at EthOnline.

    https://www.youtube.com/watch?v=xiomIoAMAeY
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  2. 16 Feb, 2021
    16 Feb, 2021
    Gasless meta-transactions using Defender
    Taught a workshop
    Ran a workshop on implementing Gasless Meta Transactions on Ethereum using OpenZeppelin Defender.
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Favorites

2023

  1. 20 Jan, 2023
    20 Jan, 2023
    AWS Certified Solutions Architect Associate
    Got Cloud certified
    I certified as an AWS Solutions Architect Associate!

    https://www.credly.com/badges/675eb0d3-1a43-4ff3-b491-9cc9d6a9406a/public_url
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2022

  1. 02 Dec, 2022
    02 Dec, 2022
    A look into formal verification of smart contracts
    Wrote an article
    Wrote a brief overview of what I learned on formal verification of smart contracts using Certora. It goes through rules, invariants, loops, ghosts, contract interactions, and more.

    Read More
  2. 03 Oct, 2022
    03 Oct, 2022
    Time off!
    Quit my job
    Stepped down from my job at OpenZeppelin after an amazing 5+ years. For the first time since I was 18 years old, I'm unemployed - I'm planning to enjoy some time off before looking for next opportunities!

    https://twitter.com/smpalladino/status/1577031810164224000
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  3. 09 Apr, 2022
    09 Apr, 2022
    Second place at Solidity Underhanded
    Won a contest
    Got second place on the Solidity Underhanded contest, with a malicious signature verification function that can be subject to replay attacks.

    https://blog.soliditylang.org/2022/04/09/announcing-the-underhanded-contest-winners-2022/

    Code here!
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2021

  1. 19 Mar, 2021
    19 Mar, 2021
    White-hat token rescue using Flashbots
    White Hat
    Token Rescue
    Rescued a bunch of Ethereum ERC20 tokens in a friends' compromised account by using the recently released Flashbots API. The rescue involved setting up a sweeper, so the hacker could not pay for the gas fees for extracting the tokens, and sending a bundle that would unlock and transfer the tokens to a secure address while simultaneously bribing the miner.
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2020

  1. 26 Oct, 2020
    26 Oct, 2020
    Released Defender
    Released a product
    Released OpenZeppelin Defender, a SaaS for automation of secure operations of smart contract systems in Ethereum and other EVM-based networks.
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  2. 06 Oct, 2020
    06 Oct, 2020
    State of Smart Contract upgrades
    Wrote an article
    Wrote an article on the state of Smart Contracts upgrades in Ethereum.

    https://blog.openzeppelin.com/the-state-of-smart-contract-upgrades/
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2019

  1. 23 Aug, 2019
    23 Aug, 2019
    Published a book on Ethereum development
    Published a book
    Published on Apress the book Ethereum for Web Developers, a book on building web apps on Ethereum. This is the book I would have liked to read when I started working on Ethereum. So, I wrote it.
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2018

  1. 05 Mar, 2018
    05 Mar, 2018
    El Gato y la Caja
    Wrote an article
    Wrote an article about how blockchains work in the science popularization site El Gato y la Caja. In Spanish.
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Podcasts

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Aztec 101 with Wonderland
Aha moment!
Over Abstraction
Devs Do Something

Experiments

2022

  1. 16 Dec, 2022
    16 Dec, 2022
    A Hardhat plugin for Noir
    Published an NPM Package
    Published a small Hardhat plugin for working with circuits written in Aztec's Noir. Integrates circuit compilation to Hardhat's compile tasks, and provides shorthands for generating and verifying proofs in tests and scripts.

    https://www.npmjs.com/package/hardhat-noir
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  2. 28 Nov, 2022
    28 Nov, 2022
    Smart contract deployment pipeline
    Built a proof of concept
    Shared a proof of concept for a smart contract deployment and upgrade pipeline, using Github Actions, Hardhat, and OpenZeppelin Upgrades & Defender.

    https://github.com/spalladino/sample-contract-deploy-pipeline
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  3. 04 Nov, 2022
    04 Nov, 2022
    Type-checking Lambda permissions with Typescript
    Built a proof of concept
    Built a proof of concept of using the Typescript type-checker to verify permissions at compile-time in Lambda functions on CDK serverless setups.

    https://dev.to/spalladino/type-checking-lambda-permissions-with-typescript-2de7
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2021

  1. 17 Aug, 2021
    17 Aug, 2021
    On-chain bouncing DVD logo
    Created an NFT
    Minted my first NFT: an SVG of the famous bouncing DVD logo. The animation resets every hour, and the logo starts at a new random position. Every block yields a new frame of the animation, so the animation updates every 15s. All assets are on-chain!

    https://twitter.com/smpalladino/status/1427460463298846720
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  2. 06 Jun, 2021
    06 Jun, 2021
    Mint POAPs to Github contributors
    Built a proof of concept
    Built a proof of concept for a Github App that allows maintainers to easily mint Etherum NFTs to reward collaborators for their contributions.
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2020

  1. 11 Oct, 2020
    11 Oct, 2020
    Smart contract upgrades without using storage
    Built a proof of concept
    Built a proof of concept for a storage-free upgrade pattern on Ethereum. This abuses CREATE2+SELFDESTRUCT for having a replaceable beacon that points to the current implementation, and draws inspiration from green-blue deployments to ensure zero downtime.

    https://github.com/spalladino/ethereum-upgrade-storage-free
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  2. 25 May, 2020
    25 May, 2020
    Test how a dapp behaves upon a reorg
    Built a proof of concept
    Built a proof of concept for forcing reorgs in a local Ethereum development network, to test how applications behave under these circumstances.

    https://github.com/spalladino/reorg-tester
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  3. 29 Mar, 2020
    29 Mar, 2020
    Rust-based CLI for Solidity compiler
    Built a proof of concept
    To teach myself a bit of Rust, built a CLI around solc-rust bindings for the solc compiler - before Foundry was a thing.

    https://github.com/spalladino/solc-rs/releases/tag/v0.1.0
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2019

  1. 26 Oct, 2019
    26 Oct, 2019
    Sign in with Google to your Identity Contract
    Built a proof of concept
    Built a proof of concept for recovering access to a smart wallet using Sign in with Google, by validating a JWT in Solidity.

    https://forum.openzeppelin.com/t/sign-in-with-google-to-your-identity-contract-for-fun-and-profit/1631
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2016

  1. 11 Nov, 2016
    11 Nov, 2016
    Solving the Cryptopals crypto challenges in Crystal
    Wrote solutions to developer challenges
    Picked up the Cryptopals crypto challenges again, this time to work through them in Crystal instead of Python.

    https://github.com/spalladino/cryptopals
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