Hashgraph

Security Engineer

• Conduct end-to-end security assessments of blockchain-based systems, from cryptographic primitive design and protocol architecture through smart contract implementation and deployed infrastructure.
• Find real vulnerabilities through hands-on review, adversarial testing, and proof-of-concept exploit development, not just automated scanning.
• Design adversarial test cases and proof-of-concept exploits for Hedera-native services, EVM-compatible contracts, cross-chain bridges, and consensus-layer components.
• Own threat modeling and security architecture reviews across product phases.
• Define and enforce security gates before new components reach production.
• Partner directly with engineering teams to translate cryptographic and protocol-level risks into concrete, prioritized remediation work.
• Build and improve security tooling, fuzzing infrastructure, and CI/CD security automation to scale security coverage without scaling headcount.
• Track emerging blockchain and web3 attack patterns, map them to the internal codebase, and drive proactive mitigation before threats materialize.

Product Security Engineer

Financial Planning and Analysis

• Own the full sales cycle from pipeline generation through close for enterprise accounts
• Build and manage a high-quality pipeline of strategic opportunities in the U.S. market
• Engage senior stakeholders (VP, C-level) to understand business problems and transformation goals
• Position HashSphere and asset tokenization/markets software as a mission-critical solution for enterprise use cases
• Partner with product, engineering, and solutions teams to shape and close deals
• Drive revenue growth and market penetration in a new and emerging category
• Help define and refine the go-to-market motion as we scale

Product Security Engineer

Sales Director, Financial Services