| Job Position | Company | Posted | Location | Salary | Tags |
|---|---|---|---|---|---|
Polar Bear Systems. | United States | $175k - $240k | |||
OpenZeppelin | Remote | $54k - $77k | |||
OpenZeppelin | Remote | $63k - $80k | |||
OpenZeppelin | Remote | $85k - $95k | |||
| Learn job-ready web3 skills on your schedule with 1-on-1 support & get a job, or your money back. | | by Metana Bootcamp Info | |||
Fmr | United States | $86k - $150k | |||
MetaWealth | Bucharest, Romania | $81k - $87k | |||
NDAX Canada Inc. | Calgary, Canada | $86k - $96k | |||
Seamless Protocol | United States | $72k - $75k | |||
Megatempo | Maia PT | $54k - $75k | |||
OpenZeppelin | Remote | $54k - $60k | |||
OpenZeppelin | Remote | $129k - $165k | |||
OpenZeppelin | Remote | $63k - $110k | |||
Agora | San Francisco, CA, United States | $105k - $180k | |||
Agora | San Francisco, CA, United States | $54k - $72k | |||
Nexus Mutual | London, United Kingdom | $87k - $87k |
Company Description
Polar Bear Systems (PBS) is a Web(n) Blockchain development organization founded in July 2019. PBS aims to bring clients to a below-freezing chilled state by providing innovative solutions. The company strives to offer solutions that elevate clients to their maximum potential.
Role Description
This is a volunteer hybrid position for a Blockchain Cybersecurity Specialist at Polar Bear Systems, located in Cambridge, MA, with the option for remote work. The Specialist will be responsible for day-to-day tasks related to application security, cybersecurity, network security, and information security in the blockchain domain.
Key Responsibilities
- Proven experience in blockchain security, penetration testing, or secure protocol design.
- Hands-on experience with smart contract auditing tools (MythX, Slither, Foundry, Hardhat).
- Strong understanding of:
- EVM-based chains (Ethereum, BSC, Polygon)
- Layer 2 rollups and cross-chain bridges
- Consensus mechanisms (PoW, PoS, PoH, PoA)
- Familiarity with Solidity, Rust, or Go.
- In-depth knowledge of cryptographic protocols (SHA, ECDSA, BLS, Merkle Trees).
- Knowledge of Web3 authentication and wallet infrastructure (Metamask, WalletConnect, Ledger).
- Experience with DevSecOps practices and CI/CD pipelines.
- Strong communication and documentation skills.
Qualifications
- Experience with ZK-SNARKs, MPC, or post-quantum cryptography.
- Background in traditional cybersecurity (CISSP, OSCP, CEH a plus).
- Contributions to blockchain or open-source security projects.
- Familiarity with KYC/AML, zero-knowledge identity, and compliance tooling.
Tools & Technologies Youâll Use
- Solidity, Rust, Go
- Hardhat, Foundry, Mythril, Slither
- Wireshark, Metasploit, Burp Suite
- OpenZeppelin, Certora, Chainlink, Forta
- GitHub, GitLab CI/CD, AWS, Docker, Kubernetes
Why Join Us
- Be at the frontier of Web3 security innovation
- Competitive compensation + token equity (if applicable)
- Collaborative, fully remote culture with growth opportunities
- Access to high-impact projects across DeFi, DAOs, NFTs, and L2s
What is OpenZeppelin?
OpenZeppelin is a widely-used open-source library of reusable smart contracts for building decentralized applications (dApps) on various blockchain platforms, including Ethereum, Binance Smart Chain, and others
The library provides a set of secure and audited building blocks, such as ERC-20 and ERC-721 tokens, multi-sig wallets, access control, and more, that developers can use to create smart contracts quickly and easily without worrying about common security pitfalls
OpenZeppelin is used for building secure and audited smart contracts on various blockchain platforms, such as Ethereum and Binance Smart Chain
The library provides a set of pre-built and reusable smart contract modules that can be easily integrated into decentralized applications (dApps)
These modules include standard tokens, like ERC-20 and ERC-721, as well as modules for access control, voting, crowdsales, and more
OpenZeppelin is used for building secure and audited smart contracts on various blockchain platforms, such as Ethereum and Binance Smart Chain
The library provides a set of pre-built and reusable smart contract modules that can be easily integrated into decentralized applications (dApps)
These modules include standard tokens, like ERC-20 and ERC-721, as well as modules for access control, voting, crowdsales, and more
OpenZeppelin is commonly used by developers to create secure and reliable smart contracts for a variety of use cases, including decentralized finance (DeFi), non-fungible tokens (NFTs), and other blockchain-based applications
The library is designed to simplify the development process by providing well-audited and tested code that can be easily customized to suit specific needs.