Senior Backend Engineer – Finapps/Access
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 Fireblocks
Fireblocks is on a mission to enable every business to easily and securely access digital assets and cryptocurrencies. As a leading provider in the digital asset space, we are committed to fostering a diverse and inclusive workforce that mirrors the global clientele we serve.
About the Team
The FinApps Access team at Fireblocks builds the backbone of on-chain access for some of the world's largest financial institutions and crypto-native organizations. We operate 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
You'll work on mission-critical infrastructure powering DeFi connectivity, multi-chain integrations, transaction execution pipelines, and on-chain data access — with direct impact on how billions of dollars flow through decentralized networks every day.
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'll Bring
- •7+ years of experience as a Backend or Full Stack Engineer.
- •Bachelor of Science (B.Sc.) or equivalent degree/experience.
- •Blockchain and Web3 experience are a must — including deep understanding of transaction lifecycles, consensus mechanisms, smart contract interactions, and on-chain data.
- •Proven experience working across multiple blockchain ecosystems — EVM-compatible chains (Ethereum, Polygon, Arbitrum, Base, etc.) 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.
- •Familiarity with DeFi protocols — AMMs, lending markets, bridging infrastructure, or on-chain routing — is a strong advantage.
- •Experience with Web3 tooling and libraries (ethers.js, viem, web3.js, Solana web3.js, etc.).
- •Demonstrated experience taking products from inception to delivery at scale.
- •Full stack experience (React, frontend development) — a nice to have.
About You
- •You think in systems and care deeply about correctness, reliability, and scale.
- •You're comfortable navigating ambiguity and can drive technical decisions with limited oversight.
- •You have a natural curiosity for how blockchain protocols work under the hood — and you actually read the specs.
- •You thrive in fast-moving environments and can balance shipping velocity with long-term code quality.
- •You communicate clearly and collaborate effectively across engineering, product, and research.
Why Fireblocks
- •Work at the frontier of blockchain infrastructure, with real impact on how DeFi scales for institutional and retail users.
- •Tackle genuinely hard engineering problems — multi-chain routing, on-chain data indexing, protocol integrations, and more.
- •Collaborate with world-class engineers, protocol researchers, and product minds in a fast-growing global company.
- •Competitive compensation, meaningful equity, and a culture that rewards ownership and initiative.
For employees hired to work from Serbia, the estimated compensation range for this role is EUR 60,000 – 80,000 gross annually. It is not typical for a candidate to be hired at or near the top of the pay range and each compensation decision is dependent on each individual case. The base salary is one component of the total compensation package, which for some roles may include a target bonus, a very competitive equity grant, and very generous benefits. While we believe competitive compensation is a critical aspect of you deciding to join us, we do hope you also spend time considering why our mission and culture are right for you. We are creating something transformational here, and we hope you are as excited about the future as we are.
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.
Please see our candidate privacy policy here.
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.