Senior Software Engineer, Transaction Security
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.
We are looking for a Senior Engineer to build and scale security infrastructure for our Transaction Threat Protection team, protecting customer transactions in real time.
This role sits at the intersection of high-volume transaction security and decentralized finance (DeFi), requiring an engineer who balances deep technical execution with a strong product mindset.
What You'll Do
- Systems Architecture: Design and maintain scalable, secure cloud infrastructure capable of processing high-velocity financial data.
- Security Engineering: Develop automated systems to detect and mitigate threats within both traditional payment flows and DeFi protocols (Smart Contracts/Web3).
- AI-Augmented Development: Integrate the latest AI tools (e.g., Claude Code, Cursor, Copilot, LLM-based analysis) into your workflow to increase engineering velocity and security coverage.
- Product Ownership: Partner with product teams to ensure security features provide a seamless user experience without compromising safety.
What You'll Bring
- Cloud & Web Expertise: Extensive experience building and deploying production-grade applications on major cloud providers (AWS/GCP/Azure).
- Full-Stack Proficiency: Strong background in modern web development frameworks and a deep understanding of web security protocols.
- Modern Tooling: High proficiency with AI-assisted coding and automated testing tools. You see AI as a core component of the modern development lifecycle.
- Product Orientation: Ability to move beyond "code-to-spec" and contribute to the product roadmap based on technical feasibility and user impact.
- [Optional] DeFi Knowledge: Experience with, or a strong technical interest in, the security challenges unique to DeFi and blockchain ecosystems.
Why This Team?
- High Stakes: You are building the primary defense for users' assets in both traditional and decentralized systems.
- Engineering Culture: We prioritize clean architecture, automated testing, and the adoption of cutting-edge development tools.
- Autonomy: You will own major components of the security stack from design through to production.
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.