Senior Application Security Engineer
Job Description
The world of digital assets is accelerating in speed, magnitude, and complexity, opening the door to new ways for leveraging the blockchain. Fireblocks’ platform and network provide the simplest and most secure way for companies to work with digital assets and it trusted by some of the largest financial institutions, banks, globally-recognized brands, and Web3 companies in the world, including BNY Mellon, BNP Paribas, ANZ Bank, Revolut, and thousands more.
About the Role The Application Security team at Fireblocks treats security as a high-stakes engineering discipline, not an administrative task. We are looking for an Adversarial Builder to lead the defense of our Global Application Landscape—securing everything from our core SDLC and Software Supply Chain to our enterprise-wide AI adoption. In this hands-on role, you will:
- •Engineer, Don’t just triage: Move beyond manual reviews to build code-driven detection logic and custom AI agents that automate vulnerability hunting, triaging and remediation.
- •Security by design: Partner with R&D teams (including Infra and DevOps) to define the application-level technical guardrails for internal and external-facing products.
- •Scout the Frontier: Act as an early adopter of state-of-the-art systems, evaluating and integrating cutting-edge tech from frontier security startups in AI and Cloud Runtime security.
This role demands a practitioner who thinks like an attacker, possesses a developer’s urge to automate, and has the broad landscape understanding to connect dots across complex, modern domains.
What You’ll Do
- •Promote Enterprise-Grade Security Initiatives: Engineer and scale the security strategy for Fireblocks’ entire product ecosystem, spanning both internal infrastructure and external-facing products. You will ensure code security at scale by hardening the SDLC, securing the Software Supply Chain perimeter, and designing the technical guardrails for AI adoption at both the enterprise and product levels.
- •AI Solutions Builder: scale our security program using AI-driven tools. You will develop and fine-tune autonomous agents to handle complex code analysis, vulnerability hunting, and automated remediation.
- •Drive Early Adoption of Frontier Tech: Act as a scout and evaluator for the world’s most innovative security startups. You’ll partner with cutting-edge vendors in emerging fields like AI Security and Cloud Runtime Security, ensuring Fireblocks remains an early adopter of state-of-the-art defensive systems.
- •Scale Through Engineering: Move beyond manual reviews. You’ll manage and extend AppSec tools to eliminate false positives and build custom logic that reflects our unique codebase.
- •Collaborative Engineering: Work alongside our in-house DevOps team to rapidly deploy custom security tools at an enterprise grade.
What You’ll Bring
- •5-7 Years of AppSec Experience-Must!
- •Broad Security Horizon: A deep understanding of the modern security landscape, including Identity (OIDC, OAuth, IAM), Supply Chain security, and Cloud-native architectures-Must
- •Technical Versatility: Strong code review skills and proficiency in at least one major language (Python, TypeScript, etc.). You should be comfortable navigating complex microservices and CI/CD pipelines (GitHub Actions, ArgoCD)-Must
- •Adversarial Intuition: You have a "hacker heart"—experience in pentesting or security research helps you anticipate risks before they manifest.
- •Strategic Communication: You can translate complex security concepts into a roadmap that engineers and stakeholders actually want to follow.
You’re a Great Fit If...
- •You see a manual task and immediately think about how to automate it with a script or an LLM.
- •You enjoy the challenge of securing industry-novel risks that don't have a "best practice" handbook yet.
- •You value simplicity in design and believe that security should be a developer enabler, not a blocker.
- •You thrive in fast-paced environments where "status quo" is a dirty word.
Why You’ll Love It Here
- •Ownership: You’ll have the autonomy to propose and lead high-impact security initiatives.
- •Cutting-Edge Stack: Work with the latest in AI, blockchain infrastructure, and cloud security.
- •A "Rapid" Culture: Our in-house DevOps capability means your tools get deployed and scaled across the enterprise in days, not months.
- •Mentorship & Growth: Collaborate with world-class experts in cryptography and cybersecurity who are committed to your professional evolution.
Fireblocks' mission is to enable every business to easily and securely access digital assets and cryptocurrencies. In order to do that, we strongly believe our workforce should be as diverse as our clients, and this is why we embrace diversity and inclusion in all its forms.
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About Fireblocks
Fireblocks is a leading enterprise-grade platform providing a secure infrastructure for moving, storing, and issuing digital assets. We empower financial institutions to seamlessly and securely embrace the burgeoning world of blockchain and Web3. Our robust technology safeguards billions in crypto assets, enabling banks, exchanges, and fintechs to build innovative products and services within the decentralized economy. We are at the forefront of digital asset security, offering battle-tested solutions that combine MPC cryptography, hardware isolation, and policy engines to deliver unparalleled protection. Our culture thrives on innovation, collaboration, and a shared passion for shaping the future of finance. We are a global, remote-friendly team composed of pioneers and experts across cybersecurity, blockchain engineering, and distributed systems. At Fireblocks, every team member contributes to solving complex challenges at the intersection of traditional finance and Web3, pushing the boundaries of what's possible in the digital asset space. We foster an environment where continuous learning and bold ideas are celebrated, offering ample opportunities for professional growth and impact. Join Fireblocks and be part of a company that is defining the infrastructure of the digital asset economy. If you are passionate about blockchain technology, have a strong drive to build secure, scalable, and cutting-edge solutions, and want to work alongside some of the brightest minds in the crypto industry, your place is with us. We offer competitive benefits, a dynamic work environment, and the chance to make a tangible difference in how the world interacts with digital assets. Explore our open positions and help us unlock the full potential of Web3.
Ready to Apply?
To submit your application for this position, please visit Fireblocks's official website and follow their application process.