| Job Position | Company | Posted | Location | Salary | Tags |
|---|---|---|---|---|---|
Polar Bear Systems. | United States | $175k - $240k | |||
Caiz | New York, NY, United States | $133k - $240k | |||
Blockstream | Remote | $36k - $54k | |||
Nika Finance | New York, NY, United States | $80k - $150k | |||
| Learn job-ready web3 skills on your schedule with 1-on-1 support & get a job, or your money back. | | by Metana Bootcamp Info | |||
Ampstek | United States | $36k - $54k | |||
Ampstek | United States | $36k - $54k | |||
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0xbow | Remote |
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Selby Jennings | New York, NY, United States | $300k - $400k | |||
VanEck Associates Corporation | Remote |
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Avomind | Remote | $122k - $150k | |||
Chainlink Labs | New York, NY, United States | $36k - $75k | |||
Usual | FR | $72k - $106k | |||
Espeo Software | 30 Poznań PL | $72k - $100k | |||
Spending Power | New York, NY, United States | $150k - $200k |
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 You’ll 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