Full Stack Engineer, Blockchain

As a Full Stack Engineer at Fireblocks, you'll build mission-critical infrastructure powering DeFi connectivity, multi-chain integrations, transaction execution pipelines, and on-chain data access for some of the world's largest financial institutions and crypto-native organizations. The FinApps Access team operates at the intersection of blockchain protocol engineering and enterprise-grade reliability, designing systems that route, protect, and optimize transactions across dozens of chains at scale.

What you'll do

• Design and build robust, scalable backend services supporting high-volume on-chain transaction flows across multiple blockchain networks - both EVM and non-EVM.
• Own end-to-end development of backend components and APIs from architecture decisions to production deployment.
• Lead integrations with DeFi protocols, on-chain data sources, and blockchain nodes across a wide range of chains and ecosystems.
• Research and evaluate emerging blockchain technologies, protocols, and standards to keep Fireblocks at the cutting edge.
• Optimize existing production systems for performance, reliability, and security to reduce latency and increase throughput.
• Collaborate closely with product, protocol research, and platform engineering teams to deliver high-quality solutions on time.
• Drive features from inception through to delivery at scale, taking full ownership of the product lifecycle.

What you bring

• 7+ years of experience as a Backend or Full Stack Engineer.
• Bachelor of Science or equivalent degree/experience.
• Deep blockchain and Web3 experience, including understanding of transaction lifecycles, consensus mechanisms, smart contract interactions, and on-chain data.
• Proven experience working across multiple blockchain ecosystems - EVM-compatible chains such as Ethereum, Polygon, Arbitrum, and Base, as well as non-EVM chains such as Solana, TON, Tron, or similar.
• Proficiency in Node.js and TypeScript.
• Experience designing and operating microservices in production CI/CD environments.
• Strong understanding of security principles, cryptography, and best practices in a blockchain context.
• Experience with Web3 tooling and libraries such as ethers.js, viem, web3.js, or Solana web3.js.
• Demonstrated experience taking products from inception to delivery at scale.

Nice to have

• Familiarity with DeFi protocols such as AMMs, lending markets, bridging infrastructure, or on-chain routing.
• Full stack experience including React and frontend development.

What we offer

• Competitive compensation and meaningful equity.
• Work at the frontier of blockchain infrastructure with real impact on how DeFi scales for institutional and retail users.
• Opportunity to tackle genuinely hard engineering problems including multi-chain routing, on-chain data indexing, and protocol integrations.
• Collaboration with world-class engineers, protocol researchers, and product teams in a fast-growing global company.

About Fireblocks

Fireblocks is the premier digital asset infrastructure provider trusted by thousands of industry-defining financial institutions, backed by over $1 billion in capital. With an enterprise-grade platform and network that have powered over $14 trillion in digital asset transfers worldwide, Fireblocks is on a mission to enable every business to easily and securely access digital assets and cryptocurrencies.