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Bernd Artmüller


All-in or die trying.


Hey there! My name is Bernd (@berndartmueller), and I've been in tech as both a startup founder and software developer for ~15 years.

2 years ago, I completely transitioned into blockchain and, specifically, security research.

My ability to quickly grasp new concepts, attention to detail, and my natural curiosity and perseverance, have helped me score top leaderboard rankings in Code4rena, Sherlock, and CodeHawks, with roughly 25 top-5 placements in competitive audits. To date, I have conducted 50+ audits and have identified numerous vulnerabilities across a wide range of DeFi protocols, wallets, bridges, VMs, and Cosmos SDK based chains.

Currently, I'm

  • Lead security auditor at Oak Security (and Solidified)
  • Senior auditor at
  • Security Researcher at Spearbit
  • Top warden (Ranking ~35 all-time) & judge at Code4rena

    My complete audit portfolio is available at

    If you want to get in touch, feel free to reach out to me.

My Expertise

Languages, Frameworks, Chains

  • Solidity & EVM ⚡⚡⚡⚡⚡
  • CosmWasm (Rust) ⚡⚡⚡⚡
  • Cosmos SDK (Go) ⚡⚡⚡⚡
  • NEAR Contracts (Rust) ⚡⚡⚡

    Protocol Categories
  • Collateralized Debt Positions (CDP)
  • Lending & Borrowing
  • Wallets
  • Bridges
  • Options
  • Order Books
  • DeFi in general


Excerpt of clients I've worked with on private engagements:

  • Filecoin
  • Badger
  • Nym
  • Evmos
  • Wormhole
  • Noble
  • Router

Audit Contest Achievements


Security portfolio


Fraxlend (Frax Finance) - C4 Contest

Ranked 🥉 #3. A permissionless lending platform and the final piece of the Frax Finance Defi Trinity.

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eBTC Review

eBTC is a collateralized crypto asset soft pegged to the price of Bitcoin and built on the Ethereum network. It is backed exclusively by Lido's stETH and powered by immutable smart contracts with minimized counterparty reliance.

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Drips Protocol - C4 Contest

Placed 🥉 #3.An Ethereum protocol for streaming and splitting funds.

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Calculated Finance (CosmWasm)

The Calculated Finance protocol allows users to utilize dollar cost averaging (DCA) strategies by creating vaults that automatically swap tokens at a specified frequency on the Osmosis DEX.

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Filecoin EVM (FEVM) Review

The Filecoin EVM (FEVM) is an Ethereum Virtual Machine (EVM) compatible, virtualized runtime on top of the Filecoin Virtual Machine (FVM).

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Ajna - Sherlock Contest

Placed 🥉 #3. Ajna is a peer to peer, oracleless, permissionless lending protocol with no governance, accepting both fungible and non fungible tokens as collateral.

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MilkyWay TIA Liquid Staking (CosmWasm)

MilkyWay offers a liquid staking solution for the Celestia ecosystem, initially deployed and operated on Osmosis.

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Bond Options - Sherlock Contest

Placed 🥈 #2. Acquire assets, own liquidity, and diversify treasuries on the permissionless Bond Marketplace.

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Evmos EVM Extensions Review

EVM extensions allow for the creation of custom precompiled smart contracts in the Evmos EVM.

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Astaria - Sherlock Contest

Placed 🥇 #1 together with Rajeev. Astaria’s mission is to build a highly functional on-chain lending protocol, with instant highly liquid NFT lending.

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Available for hire

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