Blockchain Security Lead

Who We Are: Galaxy Digital Inc. (Nasdaq: GLXY) is a global leader in digital assets and data center infrastructure, growing the economy that runs on code. Galaxy delivers the onchain infrastructure that connects institutions to digital assets, including trading, advisory, asset management, staking, self-custody, and tokenization. Galaxy also develops and operates data center infrastructure to power AI and HPC workloads. Anchored by its Helios campus in Texas, Galaxy is building a multi-gigawatt pipeline of more than 5.7 GW of potential capacity, positioning it among the largest and fastest-growing data center developers in North America. The Company is headquartered in New York City, with offices across North America, Europe, the Middle East, and Asia. What We Value: We are a diverse team of free thinkers, and fast movers united to help investors and creators energize the global economy. We are looking for individuals who thrive in a culture of builders and overachievers and embrace high performance, transparent feedback, and a mission-first approach. Our culture shapes our way of working and gets us where we want to be. Seek Excellence. Be Selective To Be Effective. Be Highly Aligned, Loosely Coupled. Disagree Transparently. Encourage Independent Decision-Making. Build Dream Teams. Who You Are: The Blockchain Security Lead owns the security posture of on-chain systems and protocols across the organization. This role blends strategic leadership with deep hands-on expertise, overseeing a small team of blockchain security engineers while actively contributing to design reviews, threat modeling, and code audits. You’ll partner closely with on-chain product and engineering teams to embed security into architecture, development, and operations—building scalable, reusable security controls that grow with the business. What You’ll Do: Lead, mentor, and grow a team of blockchain security engineers. Define and evolve the blockchain security strategy and roadmap. Serve as a trusted security partner to product, protocol, and infrastructure teams. Lead threat modeling and architecture reviews for on-chain systems. Perform and guide security reviews and audits of smart contracts (Solidity, Rust/Solana) and backend services and supporting infrastructure. Design and implement reusable security controls, patterns, and reference architectures. Support secure deployment of cloud-native infrastructure (containers, Kubernetes). Research emerging blockchain threats, exploits, and mitigations, and translate them into actionable controls. Embrace and champion the thoughtful adoption of AI to improve team performance and business outcomes. Leverage AI tools (e.g., generative AI, automation platforms, data copilots) to improve productivity, decision-making, and output quality in your day-to-day work. What We’re Looking For: Bachelor’s degree in Computer Science, Engineering, or a related field (or equivalent experience) 10+ years of security software engineering experience 5+ years working with blockchain technologies 5+ years working with smart contract security across multiple chains Experience leading or mentoring a small, highly technical team Published material on vulnerabilities/security bugs within the Web3 community Expertise in secure SDLC, threat modeling, and application architecture review Multi agent code reviews for vulnerabilities using frontier models Secure coding practices and in-depth code review capability Strong familiarity with smart contracts (Solidity, Rust), cloud-native environments (Docker, Kubernetes), authentication and authorization, TLS/PKI, and cloud, infrastructure, and network security Clear, confident communicator across technical and non-technical audiences Comfortable balancing hands-on execution with strategic ownership; detail-oriented, pragmatic, and strong in problem solving under ambiguity Bonus Points: Direct exposure to Solana, staking systems, or similar Layer 1 protocols Prior experience at a blockchain security audit firm (e.g., Trail of Bits, Halborn, Ottersec, Zellic) Background in financial services or institutional crypto security Familiarity with DeFi protocol security, key management, and custody architectures Experience contributing to or leading security programs at a crypto exchange, protocol foundation, or digital asset firm What We Offer: Competitive base salary and discretionary bonus Hybrid/Flexible Working Arrangements Flexible Time Off (paid) 3% 401(k) company contribution Company-paid health and protective benefits for employees, partners, and other dependents Generous paid Parental Leave Competitive family planning benefits for US employees Opportunities to learn about the Crypto industry Smart, entrepreneurial, and fun colleagues Free daily snacks and weekly breakfasts/lunches Employee Resource Groups Free coaching and counseling sessions through Headspace Apply now and join us as we grow the economy that runs on code. Galaxy respects diversity and seeks to provide equal employment opportunities to all employees and job applicants for employment without regard to actual or perceived age, race, color, creed, religion, sex or gender (including pregnancy, childbirth, lactation and related medical conditions), gender identity or gender expression (including transgender status), sexual orientation, marital or partnership or caregiver status, ancestry, national origin, citizenship status, disability, military or veteran status, protected medical condition as defined by applicable state or local law, genetic information or predisposing genetic characteristic, or other characteristic protected by applicable federal, state, or local laws and ordinances. We will endeavor to make a reasonable accommodation to the known limitations of a qualified applicant with a disability unless the accommodation would impose an undue hardship on the operation of our business. If you believe you require such assistance to complete the application process or to participate in an interview, please contact careers@galaxy.com.