| Job Position | Company | Posted | Location | Salary | Tags |
|---|---|---|---|---|---|
Polar Bear Systems. | United States | $175k - $240k | |||
Unlimit | Belgrade, Serbia | $83k - $99k | |||
Caiz | New York, NY, United States | $133k - $240k | |||
Caiz | Remote | $54k - $90k | |||
| Learn job-ready web3 skills on your schedule with 1-on-1 support & get a job, or your money back. | | by Metana Bootcamp Info | |||
Caiz | Turkey, NC, United States | $68k - $90k | |||
Caiz | Remote | $105k - $157k | |||
Caiz | Remote | $90k | |||
Neo Group | Malta | $108k - $126k | |||
visa | Austin, TX, United States | $72k - $75k | |||
Confusion Capital | Remote | $90k - $120k | |||
Uniswaplabs | Remote | $172k - $191k | |||
Layerzerolabs | Remote | $39k - $45k | |||
Keyrock | Brussels, Belgium | $72k - $90k | |||
Keyrock | Brussels, Belgium | $72k - $90k | |||
OP Labs | Remote | $190k - $260k |
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
How do I get a job at DeFi?
Getting a job in the DeFi (decentralized finance) industry can be a competitive process, but there are a few steps you can take to increase your chances of finding a job in this field:
- Build up your skills and knowledge: To work in DeFi, you'll likely need to have a strong understanding of blockchain technology, as well as other related technologies such as smart contracts and cryptocurrency. Consider taking online courses or earning a degree in a relevant field to build up your skills and knowledge.
- Network with industry professionals: Attend meetups and conferences related to DeFi and make connections with professionals in the industry. Networking can be a valuable way to learn about job openings and get your foot in the door at a DeFi company.
- Create a strong online presence: Many DeFi companies will look at your online presence (such as your LinkedIn profile and personal website) when considering you for a job. Make sure to showcase your skills and accomplishments online and keep your profile up to date.
- Apply for relevant job openings: Keep an eye out for job openings at DeFi companies and apply for positions that align with your skills and experience. Apply for DeFi Jobs without Experience. Tailor your resume and cover letter to the specific job you're applying for and highlight any relevant experience or skills you have.
- Consider internships or volunteer work: DeFi Internships or volunteer work can be a great way to get your foot in the door and gain valuable experience in the DeFi industry. Many companies also offer internships to students, so consider applying for an internship if you're still in school.
- Be persistent: keep trying if you don't get a job right away. It can take time to find the right opportunity, but with the right skills and determination, you can land a job in the DeFi industry.