Web3 DeFi Solidity Jobs in California
Browse Web3 DeFi Solidity Jobs in California — updated June 2026.
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| Job Title | Company Name | Salary | Location | Tags | Posted | |
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| OKX | 📍 San Jose, California, United States | Web3Non TechTrading | ||||
| Notebook Labs | 📍 Menlo Park | LegalSecurityDeveloper | ||||
| Tessera | RemoteNon TechDevopsLegal | |||||
| Gauntlet Networks | RemoteResearchDeveloperPython | |||||
| Tessera | RemoteDevopsFull TimeDeveloper | |||||
Senior Blockchain Developer
Oct 02, 2023
Who We Are
At OKX, we believe our future is reshaped with technology.
Founded in 2017, OKX is one of the world’s leading cryptocurrency spot and derivatives exchanges. OKX innovatively adopted blockchain technology to reshape the financial ecosystem by offering some of the most diverse and sophisticated products, solutions, and trading tools on the market. Trusted by more than 20 million users in over 180 countries globally, OKX strives to provide an engaging platform that empowers every individual to explore the world of crypto. In addition to its world-class DeFi exchange, OKX serves its users with OKX insights, a research arm that is at the cutting edge of the latest trends in the cryptocurrency industry. With its extensive range of crypto products and services, and unwavering commitment to innovation, OKX’s vision is a world of financial access backed by blockchain and the power of decentralized finance.
We invest in our people as much as we invest in the technology. We are united by our engaging culture, here we win as a team, embrace changes, and do the right thing. We are committed to creating a friendly, rewarding and diverse environment for OKers. It doesn’t matter where you come from, everyone feels valued here, respected and has the same opportunities to develop and thrive — we want to bring out the best in you.
About the Opportunity
We are seeking a talented and experienced Blockchain Developer to join OKBC (zk layer2) development team. As a Blockchain Developer, you will be responsible for designing, implementing, and maintaining blockchain-based solutions. Additionally, you will provide support for OKBC hackathons to encourage innovation and collaboration within the OKBC community.
What You’ll Be Doing
- Blockchain Development: Design, develop, and deploy blockchain solutions, including smart contracts and decentralized applications.
- Programming: Write clean, efficient, and maintainable code in languages such as Solidity, Go, or Rust, C++ depending on the blockchain platform being used.
- Smart Contract Development: Create, test, and deploy smart contracts on various blockchain platforms, ensuring security and efficiency.
- Architecture Design: Collaborate with architects and software engineers to design scalable and secure blockchain architectures that meet business and technical requirements.
- Performance Optimization: Analyze and optimize the performance of blockchain networks, including transaction throughput and latency, to enhance scalability and efficiency.
- Documentation: Create technical documentation, including design specifications, development guides, and API references, to ensure proper usage and maintenance of blockchain solutions.
What We Look For In You
- Bachelor's or Master's degree in Computer Science, Software Engineering, or a related field.
- Proficiency in programming languages such as C++, Rust, Go or Solidity.
- Hands-on experience with L2 platforms, such as Polygon ZKEvm, ZKSync Era, Linea, Taiko, Scroll, etc, or L1 platforms like Ethereum, Cosmos, EVM or Webassembly virtual machines.
- Excellent communication and teamwork skills, with the ability to collaborate effectively with cross-functional teams.
- Hands-on experience with blockchain platforms like Ethereum, Cosmos, Bitcoin, EVM or Webassembly virtual machines.
- Proven experience as a Blockchain Developer or similar role, with a strong understanding of blockchain concepts, consensus algorithms, and cryptographic principles.
- Familiarity with smart contract development tools and frameworks (e.g., Truffle, Remix, Web3.js).
- Strong problem-solving and analytical skills, with the ability to design and develop efficient blockchain solutions.
Highlights of Perks and Benefits
- Market competitive total compensation package
- Comprehensive insurance package including medical, dental, vision, disability & life insurance (Company pays 100% for employee/80% for dependents)
- 401K with company contribution
- Paid Parental Leave
- Employee Referral Bonus Program paid in BTC
- Company Donation Match
- More surprises when you join!
The salary range for this position is $166,000 to $293,000. The salary offered depends on a variety of factors, including job-related knowledge, skills, experience, and market location. In addition to the salary, a performance bonus and long-term incentives may be provided as part of the compensation package, as well as a full range of medical, financial, and/or other benefits, dependent on the position offered. Applicants should apply via Okcoin and OKX internal or external careers site.
OKX is committed to equal employment opportunities regardless of race, color, genetic information, creed, religion, sex, sexual orientation, gender identity, lawful alien status, national origin, age, marital status, and non-job related physical or mental disability, or protected veteran status. Pursuant to the San Francisco Fair Chance Ordinance, we will consider for employment qualified applicants with arrest and conviction records.