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, reducing latency and increasing 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.
• A Bachelor of Science (B.Sc.) or equivalent degree or experience.
• Blockchain and Web3 experience including a deep understanding of transaction lifecycles, consensus mechanisms, smart contract interactions, and on-chain data.
• Proven experience working across multiple blockchain ecosystems, including EVM-compatible chains such as Ethereum, Polygon, Arbitrum, and Base, as well as non-EVM chains such as Solana, TON, and Tron.
• Proficiency in Node.js and TypeScript.
• Experience designing and operating microservices in production CI/CD environments.
• A 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, and 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 with React and frontend development.

What we offer

• Competitive compensation and meaningful equity.
• Work on mission-critical infrastructure at the frontier of blockchain technology, with direct impact on how billions of dollars flow through decentralized networks.
• Collaboration with world-class engineers, protocol researchers, and product teams in a fast-growing global company.

About Fireblocks

Fireblocks is bringing global finance onchain as the premier digital asset infrastructure provider trusted by thousands of financial institutions including BNY Mellon, BNP Paribas, ANZ Bank, Western Union, Stripe, and Revolut. Backed by over $1 billion in capital, Fireblocks has powered over $14 trillion in digital asset transfers worldwide.