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Solidity Smart Contract Developer Jobs in California

De Circle

Reins - Fullstack Engineer

San Francisco, CA · On-site +1

Infrastructure/devops is not a current priority. Backend & Integrations * Design and build backend ... Implement and review Solidity smart contracts, focusing on correctness, safety, and upgradeability

De Circle

Odos - Backend Engineer

San Francisco, CA · On-site +1

Smart Contract Development * Experience with EVM smart contract development using Solidity ... years of backend engineering experience preferred * Comfortable with taking ownership of the ...

De Circle

Odos - Integrations

San Francisco, CA · On-site +1

$122K - $164K/yr

You'll reverse-engineer smart contract systems, map new AMM logic into our routing framework, extend our Python indexers, and occasionally add Solidity cases to our on-chain executors. As we expand ...

De Circle

EVM Engineer - Magic Eden

San Francisco, CA · On-site +1

$180K - $220K/yr

We're looking for an experienced EVM Engineer with a deep passion for NFTs and NFT marketplaces to ... smart-contract development with Solidity, Foundry, Web3.js / Ethers.js frameworks JavaScript ...

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Solidity Smart Contract Developer information

What is a Solidity smart contract developer?

Solidity Smart Contract Developers are professionals who specialize in writing, testing, and deploying smart contracts using the Solidity programming language, primarily for the Ethereum blockchain. They design secure, automated agreements that execute specific actions when predefined conditions are met. Their responsibilities include auditing code, optimizing contract efficiency, and ensuring the security and reliability of decentralized applications (dApps). These developers play a crucial role in the blockchain ecosystem by enabling trustless interactions and decentralized finance (DeFi) solutions.

What are the key skills and qualifications needed to thrive as a Solidity smart contract developer?

To thrive as a Solidity Smart Contract Developer, you need a strong understanding of blockchain fundamentals, proficiency in the Solidity programming language, and experience with Ethereum-based development. Familiarity with tools like Truffle, Hardhat, Remix, and version control systems, as well as knowledge of smart contract security best practices and relevant certifications, is often expected. Attention to detail, problem-solving skills, and effective communication help developers navigate complex logic and collaborate with cross-functional teams. These capabilities are crucial for building secure, reliable, and efficient smart contracts that power decentralized applications.

How does a Solidity smart contract developer typically collaborate with auditors and other team members during the development process?

Solidity Smart Contract Developers work closely with auditors, project managers, and frontend engineers to ensure contracts are secure, efficient, and user-friendly. During development, they often participate in code reviews, provide detailed documentation, and address vulnerabilities identified by internal or external security audits. Effective communication and openness to feedback are essential, as developers must explain their logic and quickly implement recommended changes. This collaborative approach helps ensure the reliability and safety of deployed smart contracts, which is critical in blockchain environments.

What cities in California are hiring for Solidity Smart Contract Developer jobs?

Cities in California with the most Solidity Smart Contract Developer job openings:

Infographic showing various Solidity Smart Contract Developer job openings in California as of August 2026, with employment types broken down into 67% Full Time, 28% Part Time, 1% Temporary, and 4% Contract. Highlights an 92% Physical, 3% Hybrid, and 5% Remote job distribution.

Odos - Smart Contracts Engineer EVM

San Francisco, CA • On-site, Remote

De Circle
See more jobs at De Circleexternal

Full-time

Re-posted 20 days ago

Job description

About Us
Odos (odos.xyz) is a smart order routing (SOR) solution that allows users to trade digital assets across decentralized exchanges. Launched in May 2022, Odos is available on 15 EVM chains and uses a patented algorithm to deliver the best swap rates to retail and institutional traders. Our multi-token swap feature allows users to trade many tokens in a single atomic transaction, and our newly launched intent based order types are leading the way in advancing the Web3 user experience. We are headquartered in Los Altos, CA (SF Bay Area).
About the Role
We're looking for a talented Backend / Smart Contract Engineer to help design and build the core infrastructure that powers Odos. You'll work on critical components ranging from backend services and APIs to gas-optimized Solidity contracts and on-chain logic. Your work will directly impact how users and protocols interact with DeFi at scale.
What You'll Do
  • Design and develop backend systems that coordinate complex DeFi interactions, including trade routing, transaction simulation, and analytics.
  • Write, audit, and maintain robust, gas-efficient smart contracts in Solidity.
  • Collaborate with frontend and protocol teams to ensure seamless integration across the Odos stack.
  • Conduct performance profiling, optimize for gas costs and execution time.
  • Stay up to date with the latest DeFi protocols, standards, and smart contract best practices.
  • Lead and participate in code reviews, architecture discussions, and technical planning.
  • Contribute to cross-chain infrastructure and help expand Odos to new blockchains.
  • Write and maintain comprehensive documentation for internal and external use.

3+ years of professional backend engineering experience
  • Strong proficiency in one or more backend languages: Rust, Go, Node.js, or Python.
  • Experience designing scalable APIs, data processing systems, or infrastructure for financial or real-time applications.
  • 2+ years of hands-on experience writing smart contracts in Solidity
    • Proven experience deploying, testing, and maintaining contracts on Ethereum or EVM-compatible chains.
    • Deep understanding of smart contract security, gas optimization, and upgradeability patterns.
  • Solid understanding of DeFi protocols and primitives
    • Familiar with token standards (ERC-20, ERC-721, ERC-1155, ERC-4626), DEXes (Uniswap, Curve, Balancer), and lending protocols (Aave, Compound, etc.).
    • Ability to reason about complex on-chain interactions and liquidity mechanics.
  • Proficient with Web3 development tools
    • Experience using Hardhat, Foundry, Ethers.js, Web3.py, and related frameworks.
    • Comfortable simulating and analyzing Ethereum transactions.
  • Strong systems and architectural thinking
    • Ability to design systems that are performant, resilient, and maintainable across multiple chains and components.
  • Self-driven and collaborative
    • Thrives in a fast-paced, async-friendly startup environment.
    • Comfortable working independently and coordinating across functions (e.g., frontend, product, protocol).

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