| Job Position | Company | Posted | Location | Salary | Tags |
|---|---|---|---|---|---|
Polar Bear Systems. | United States | $175k - $240k | |||
Caiz | New York, NY, United States | $133k - $240k | |||
Crypto.com | Hong Kong, Hong Kong | $62k - $77k | |||
integriteeag | Switzerland | $54k - $77k | |||
| Learn job-ready web3 skills on your schedule with 1-on-1 support & get a job, or your money back. | | by Metana Bootcamp Info | |||
integriteeag | Switzerland | $54k - $77k | |||
mobileprogrammingllc | Alexandria, Egypt | $80k - $95k | |||
Kraken | United States | $127k - $203k | |||
Keyrock | Brussels, Belgium | $72k - $90k | |||
Keyrock | Brussels, Belgium | $72k - $90k | |||
Blockstream | Remote | $112k - $156k | |||
OP Labs | Remote | $190k - $260k | |||
Blockchain | Remote | $105k - $150k | |||
Zetachain | Remote | $36k - $54k | |||
Blockstream | Remote | $36k - $54k | |||
Offchain Labs | Remote | $126k - $150k |
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
What does a Rust developer in web3 do?
A Rust developer in the context of web3 is a programmer who uses the Rust programming language to build applications and tools for the decentralized web, also known as the web3 ecosystem
The specific responsibilities of a Rust developer in web3 may vary depending on the project or organization they are working for, but in general, they would be responsible for writing, testing, and maintaining Rust code that is used to build web3 applications
This could include things like creating smart contracts for decentralized finance (DeFi) applications, building tools for interacting with decentralized storage networks, or developing decentralized applications (dApps) for the web3 ecosystem.