# Hiring: Blockchain Security Engineer ## About the Role As a Blockchain Security Engineer at CertiK, you will play a pivotal role in safeguarding Web3 ecosystems through cutting-edge security services. Your work will bridge cybersecurity and blockchain technology, encompassing smart contract audits, protocol security assessments, penetration testing, and vulnerability research. ## Key Responsibilities * Design and execute comprehensive adversary simulations, from proof-of-concept (PoC) to final reporting * Conduct thorough security testing across application layers, consensus mechanisms, and underlying network protocols * Develop whitehat tools and exploits for bug bounty programs and internal research * Clearly articulate security risks and remediation strategies through written reports and verbal briefings * Collaborate with cross-functional teams while demonstrating autonomy on specialized assignments * Uphold the highest ethical standards in alignment with company policies and professional best practices ## Qualifications * Genuine passion for blockchain technology and Web3 security * 3+ years of application development experience in Golang, Rust, or Solidity (blockchain/smart contract experience preferred) * Hands-on experience with reverse engineering and fuzzing techniques (preferred) * Proficiency in at least one scripting language (Python, JavaScript, etc.) * In-depth knowledge of blockchain architectures and smart contract implementations * Expertise in Golang-based smart contract runtimes (EVM, CosmWasm, etc.) * Ability to assess technical and operational risks through critical thinking * Proven track record in security research, including vulnerability discovery and exploit development ## Bonus Qualifications * Experience with Ethereum clients (particularly Geth and its forks) * Understanding of consensus algorithms (PBFT, HotStuff, and derivatives) * Working knowledge of cryptographic primitives (key management, hash functions, Merkle trees) * Familiarity with Cosmos SDK and Tendermint consensus * Knowledge of Inter-Blockchain Communication (IBC) protocol Send the CV to mailbox: ming.wang@certik.com