Senior Backend Engineer, Key Management
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 team
The KMS team sits at the very heart of Fireblocks’ platform and is a pivotal team in the company.
The team is responsible for the cryptographic backbone of the platform that secures customers’ most sensitive secrets. Every transaction signing flow. Every cosigner interaction. Every key generation ceremony. Every backup and recovery mechanism. If it touches a private key - it touches this team.
The team performs mission-critical engineering at high scale, working on systems where failure is not an option, security is existential, performance matters and correctness is everything. The work is deep, challenging, and intellectually demanding - blending modern C++ systems programming with distributed backend architecture and applied cryptography.
If you enjoy solving problems where security, scale, distributed systems, and adversarial thinking collide - this is your kind of challenge.
What You'll Do
You’ll collaborate with backend engineers, infrastructure teams and security and cryptography researchers to ship production-grade highly secure digital signing systems, balancing cryptographic rigor, performance constraints, and distributed reliability in a domain where small mistakes have massive consequences. This includes:
- •Architecting, designing and implementing distributed backend services responsible for key generation, storage and lifecycle management
- •Developing high-assurance signing protocols and signing flows (utilizing MPC or external signing devices)
- •Building secure backup and disaster recovery mechanisms for cryptographic material
- •Hardening systems against adversarial conditions and real-world attack vectors
- •Optimizing performance-critical components that execute complex operations
What You'll Bring
- •7+ years of strong backend experience in production systems
- •Experience building large-scale backend or distributed systems (SaaS experience strongly preferred)
- •Experience working with distributed SQL DBs
- •Experience working with cloud and backend technologies (e.g. Docker, K8S, AWS, Azure, DataDog, Prometheus)
- •Deep understanding of concurrency, memory management, system design, and performance optimization
- •Experience working on mission-critical or high-reliability platforms
- •A strong security engineering mindset
Strong Advantage
- •Experience with TypeScript
- •Experience with multiple development environments, languages and paradigms
- •Experience with cryptography, MPC, threshold signatures, or key management systems
- •Familiarity with blockchain technologies
- •Experience with confidential computing technologies
- •Experience integrating with HSMs or secure enclaves
- •Background in highly security-sensitive environments
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.