HQ: Singapore • Cryptocurrencies • Blockchain Infrastructure • 501-1000 employees • Est. 2015 • Hiring 1
Input Output Group is a blockchain research and engineering company behind the Cardano network. It shapes engineering direction and the developer ecosystem with an AI-first philosophy, and it hires a chief technology officer who works with the executive team. The company is headquartered in Singapore.
No named decision-maker yet.
No careers mailbox known
$250k – $300k per year • Head+ • In office (Longmont, United States) • Full-Time • Architect
HQ: Buenos Aires, Argentina • Blockchain Infrastructure • Smart Contracts & Security • Est. 2015 • Hiring 5
OpenZeppelin is a smart contract security company founded in 2015 with origins in Buenos Aires. Its open-source contract libraries are the de facto standard for token and access control implementations across Ethereum and compatible chains. The firm also performs audits and sells Defender, a platform for secure contract operations, upgrades and incident response.
No named decision-maker yet.
No careers mailbox known
≈ $145k – $229k per year (Estimated) • Senior • 3+ years exp • Remote (likely Argentina) • Senior • English
Move
Cairo
Solidity
Cairo
OpenZeppelin Cairo
AI/ML
Cursor
Claude Code
Tokenization
Web3
Stellar
Arbitrum
Aptos
Cardano
OpenZeppelin
Starknet
Smart Contracts
DeFi
Token Standards
Tokenomics
Aleo
Chainlink
Aave
Uniswap
Ethereum
LayerZero
Wormhole
Axelar
Chainlink CCIP
+18
HQ: Amsterdam, Netherlands • Crypto Exchanges • DeFi • 11-50 employees • Est. 2012 • Hiring 1
Cardax is a decentralized exchange platform for trading tokens on the Cardano blockchain without a central entity. Its exchange rules are written as smart contracts in Plutarch, a Haskell-based language, and the company hires backend blockchain developers. The company is based in Amsterdam, Netherlands.
David Watumull · Executive Officer · decision-maker
Nicholas Mitsakos · Executive Officer, Director · decision-maker
John Russell · Executive Officer · decision-maker
Michele Galen · Director
No careers mailbox known
Remote (likely Netherlands) • Full-Time
Haskell
Web3
Cardano
Smart Contracts