Bitcoin Security Engineer — Strategy

Strategy (Nasdaq: MSTR) is at the forefront of transforming organizations into intelligent enterprises through data-driven innovation. We don’t just follow trends—we set them and drive change. As a market leader in enterprise analytics and AI software, we’ve pioneered the BI and analytics space, empowering people to make better decisions and revolutionizing how businesses operate. We are now also at the forefront of AI disruption, providing data via our enterprise semantic layer to AI agents, tools, and platforms.

But that’s not all. Strategy is also leading a groundbreaking shift in digital assets, adopting bitcoin as our primary treasury reserve asset in 2020. Since then, we have issued innovative bitcoin-backed securities and have been the leader in bitcoin treasury companies. This visionary move has helped us build a fortress balance sheet, and is solidifying our position as a forward-thinking, innovative force in the market.

Our people are the core of our success. At Strategy, you’ll join a team of smart, creative minds working on dynamic projects with cutting-edge technologies. We thrive on curiosity, innovation, and a relentless pursuit of excellence.

Our corporate values—bold, agile, engaged, impactful, and united—are the foundation of our culture. As we lead the charge into the new era of AI and financial innovation, we foster an environment where every employee’s contributions are recognized and valued.

Join us and be part of an organization that lives and breathes innovation every day. At Strategy, you’re not just another employee, you’re a crucial part of a mission to push the boundaries of analytics and redefine financial investment.

• Tysons Corner, Virginia
• Full-time in person from Strategy Office – working hours from 8.30 am to 6 pm

Strategy is expanding its Bitcoin Security program with a dedicated offensive-security function to continuously test, validate, and harden the security of Strategy’s bitcoin holdings, custody relationships, and supporting infrastructure. The Bitcoin Security Engineer is a hands‑on, deeply technical individual-contributor role responsible for adversarially assessing every layer of Strategy’s bitcoin security posture—from cryptographic key material and signing ceremonies to the custodians, exchanges, and service providers that safeguard institutional-scale bitcoin.

Where the Director of Bitcoin Security sets architecture and strategy, this role validates it—probing wallets, hardware, protocols, and custodial controls to find weaknesses before adversaries do, and producing rigorous research and analysis that raises the security bar across the bitcoin custody ecosystem.

• Bitcoin & Wallet Penetration Testing: Plan and execute hands‑on penetration tests against Strategy’s bitcoin wallet architectures, including single‑sig, multisignature, MPC, and hardware‑wallet deployments, targeting key generation, storage, backup and recovery workflows for exploitable weaknesses.
• Signing Ceremony & Custody Red‑Teaming: Design and run adversarial simulations of signing ceremonies, quorum policies, and transaction‑approval workflows, testing for insider‑threat, social‑engineering, collusion, and operational‑security failure modes across cold, warm, and hot storage tiers.
• Hardware & Cryptographic Testing: Perform security testing of hardware wallets, HSMs, secure elements, and air‑gapped devices, including firmware analysis, fault‑injection and side‑channel research, entropy and RNG validation, and supply‑chain tamper assessment.
• Protocol, Node & Transaction‑Layer Testing: Test Bitcoin node, RPC, and transaction‑construction surfaces, including PSBT handling, fee and RBF logic, transaction malleability, address‑generation and derivation‑path validation, and…