Smart Contract Engineer (Solidity) at Ostium
Company/Recruiter: Ostium
✦ AI Summary
Ostium is building the premier onchain platform for trading real-world assets. By bringing traditional financial markets such as Gold, the S&P 500, and Tesla onchain, Ostium is redefining how global markets are accessed through decentralized finance.
Ostium is building the premier onchain platform for trading real-world assets. By bringing traditional financial markets such as Gold, the S&P 500, and Tesla onchain, Ostium is redefining how global markets are accessed through decentralized finance.
Company: Ostium
Location: Remote (Worldwide)
Level: Mid-Level
Category: Engineering / Web3
Role Overview
Ostium is seeking a Smart Contract Engineer to design, develop, and deploy secure, gas-efficient Solidity smart contracts that power perpetual trading of real-world assets. You will work closely with protocol, backend, and security-focused engineers to build reliable and scalable DeFi infrastructure.
Why Join Ostium
- Competitive compensation
- Fully remote role with flexible working hours
- Opportunity to work on onchain TradFi derivatives with real-world impact
- Collaborative, security-focused engineering culture
Key Responsibilities
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- Design, implement, and audit upgradeable, gas-optimized Solidity smart contracts
- Build core perpetual trading logic, including: Margining systems Funding rate mechanisms Liquidation processes Trade execution flows
- Margining systems
- Funding rate mechanisms
- Liquidation processes
- Trade execution flows
- Integrate Chainlink and off-chain oracle systems
- Write, maintain, and execute robust smart contract tests using Foundry
- Collaborate with backend engineers on protocol and infrastructure integrations
- Contribute to security-first development practices and code reviews
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Requirements
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- Strong proficiency in Solidity with deep understanding of the EVM
- Hands-on experience with Foundry, Hardhat, and DeFi primitives
- Familiarity with: Smart contract upgrade patterns Oracle systems On-chain security best practices
- Smart contract upgrade patterns
- Oracle systems
- On-chain security best practices
- 2+ years of experience building Web3 or DeFi protocols (preferred)
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