Top Blockchain Developer Jobs

Design, build, test, and deploy smart contracts and decentralized applications. Maintain blockchain integrations and backend services, optimize for security and gas efficiency, contribute to architecture and technical strategy, conduct code reviews, mentor junior engineers, and collaborate with product, frontend, and security teams.

Lead engineering of secure, scalable blockchain and cloud-native services. Design, develop, review, and troubleshoot production code; improve operational stability and automation; guide architecture evaluations and vendor integrations. Drive adoption and governance of AI-assisted engineering practices and coach teams on secure, compliant usage.

Build software at Coinbase while responsibly using and integrating generative AI copilots (e.g., LibreChat, Gemini, Glean). Continuously learn evolving tools, apply human-in-the-loop practices, and deliver business-ready outputs that improve efficiency, cost, and quality. Participate in quarterly in-person working sessions as part of a remote-first culture.

Senior backend engineer responsible for designing, building, and delivering enterprise-grade web applications for Citi's Digital Assets Platform. Collaborate on blockchain/web3 integration, follow engineering best practices, maintain documentation, resolve issues, and ensure scalable, reliable production systems using enterprise tooling and DevOps practices.

Design, implement, and maintain blockchain infrastructure and dApps. Develop and review smart contracts, optimize consensus and cryptography for scalability and security, troubleshoot performance and reliability issues, and collaborate with product and design teams to deliver features while staying current with blockchain advancements.

The Senior Blockchain Engineer will design and develop decentralized applications, smart contracts, and blockchain infrastructure for diverse Web3 projects, focusing on DeFi and digital assets.

Build and extend backend services and smart contracts for an on-chain payment pipeline. Implement calldata construction, signing, nonce management, L2 submission, custody integrations, audit logging, and automated tests. Maintain async transaction queues, enforce payment integrity controls, follow upgrade-safety and governance patterns, participate in on-call rotation, and collaborate with senior engineers to deliver reliable production features.

Build and deliver backend enterprise web applications for Citi's Integrated Digital Assets Platform using Java/Spring and web3 technologies. Collaborate with distributed teams, follow best practices and design patterns, write technical documentation, resolve issues, and ensure scalability, reliability, and performance.

Design and maintain cross-chain integrations, build transaction creation/signing and status-tracking flows, integrate liquidity/exchange/bridge providers, improve route safety and execution reliability, and help set architecture and engineering standards with product and platform teams.

Design, develop, deploy and maintain production Rust smart contracts for Stellar (Soroban) and Solana. Own contract lifecycle, lead code reviews and security assessments, build testing and CI/CD pipelines, mentor engineers, integrate with backend/frontend services, participate in incident response, and stay current with blockchain and cryptographic developments.

Design, develop, deploy and maintain production Rust smart contracts for Stellar (Soroban) and Solana. Lead code reviews, security assessments, CI/CD and testing strategies, integrate contracts with backend/frontend systems, mentor engineers, and participate in incident response and audit readiness for regulated financial environments.

Develop and deliver distributed applications on Ethereum/Blockchain. Write Solidity smart contracts, build blockchain POCs, work on multiple blockchain initiatives, and engage directly with clients and business stakeholders.

Design, develop, and maintain Java-based backend systems that integrate with blockchain platforms and smart contracts. Implement DApps and smart contracts, collaborate with cross-functional teams to deliver features, optimize performance and scalability, ensure secure blockchain interactions, and stay current with distributed ledger technologies.

Design, develop, and secure blockchain solutions including smart contracts and DApps. Collaborate with teams to integrate, optimize performance, audit security, document projects, and provide technical support and training.

Design, develop, test, and deploy secure smart contracts and DApps on platforms like Ethereum and Solana. Manage digital asset lifecycle (issuance, settlement, custody), integrate blockchain components with front-end/back-end using Web3 libraries, perform security audits, and optimize performance and scalability.

Design, develop, and maintain backend systems for Web3 wallet and blockchain products. Build services for on-chain data acquisition, parsing, indexing, and analysis. Participate in full development lifecycle, integrate smart contracts, troubleshoot blockchain interactions, and support on-call incident handling.

Lead technical strategy and architecture for Coinbase's Blockchain Platform, overseeing nodes, indexers, wallets, and asset lifecycle. Drive cross-team platform rearchitectures, enforce security and reliability standards, champion AI-driven automation, use observability to improve reliability, and represent the platform to executives to secure alignment and resources for large-scale blockchain infrastructure initiatives.

Develop blockchain with high security and scalability, operate a network, and optimize requests while managing costs.

Design, develop, and implement blockchain solutions; integrate with existing systems; ensure compliance and data privacy; collaborate across teams.

Design, develop, and maintain enterprise-wide blockchain systems and applications. Build and test smart contracts, evaluate hardware-software interfaces, apply cryptography and P2P principles, document testing and maintenance, and propose technical solutions within an Agile team.

As a Blockchain Developer, you will design, develop, and implement secure blockchain solutions, work on DLT applications, and maintain infrastructure.

As a Blockchain Developer, you'll design and develop blockchain applications, write secure smart contracts, optimize performance, and mentor junior developers, contributing to technical leadership.

Design and implement smart contracts and blockchain-based applications, build backend integrations with blockchain networks, participate in architecture and security reviews, improve scalability and reliability, mentor engineers, and collaborate with product and design to ship production-ready Web3 products.

Research and design consensus algorithms and Layer 2 protocol upgrades. Implement and optimize protocol changes to improve scalability, performance, and security. Collaborate with researchers and engineers on cryptographic solutions and contribute to technical design discussions in a fast-paced blockchain R&D environment.

Research and improve consensus algorithms, design and implement Layer 2 protocol upgrades, optimize protocol performance and security, and collaborate with experts on cryptographic solutions and blockchain R&D.