OFFENSIVE SECURITY ENGINEER - 100% REMOTE, BLOCKCHAIN, DEFI
About the position Halborn Inc is seeking a Bitcoin Offensive Security Engineer to join our elite team focused on providing value-add security services and products to cutting-edge technology firms, particularly in the blockchain and DeFi sectors. Founded in 2019, Halborn specializes in solving complex adversarial problems unique to the cryptocurrency and fintech industries. Our clientele includes exclusive blockchain companies and high-growth startups. This position is fully remote, allowing for flexibility and independence in work hours. Responsibilities • Conduct realistic adversary simulations from conception through reporting. • Perform testing on systems, applications, networks, and processes. • Research cutting-edge offensive security techniques. • Develop tools and exploits. • Communicate clearly and effectively, both written and orally, regarding risks and required remediations. • Work collaboratively and independently on unique or specialized assignments requiring specific knowledge or experience. • Comply with Company, Division, and Professional ethical standards. Requirements • A passion for the blockchain industry. • 3+ years of experience in application development in Golang and C++ (both are mandatory). • 2+ years of offensive security experience. • Experience in WASM/BPF is a plus. • Understanding of system administration and network administration. • Experience using common penetration testing tools (BurpSuite, Metasploit, etc.). • Practical reverse engineering and fuzzing experience is a plus. • Proficient in at least one scripting language. • Proficiency with common server and workstation operating systems. • Proficient in testing modern web application languages and frameworks. • Proficient knowledge of blockchain and smart contract implementations. • Deep understanding of Golang-based smart contract runtimes. • Ability to think critically and identify areas of technical and non-technical risk. • Ability to write technical reports and communicate technical content to non-technical audiences. • Experience in security research, including vulnerability discovery and exploit development. Nice-to-haves • Experience working with Bitcoin or its forks (Bitcoin Cash, etc.). • Experience working with Ethereum clients. • Experience with Cosmos SDK and solid understanding of Tendermint. • Experience with IBC (Inter-Blockchain Communication). • Experience working with consensus protocols. • Basic knowledge of cryptographic primitives such as public/private keys, hash functions, and Merkle trees. • Relevant security certifications are a plus but not required (OSCP, OSCE, GPEN, GWAPT, LPT, CISSP). Apply tot his job Apply tot his job