Top Blockchain Developer Jobs

Build and operate blockchain network infrastructure integrating protocols such as Bitcoin and Ethereum with internal services. Design reliable APIs, SDKs, data contracts, observability, and SLOs; lead multi-quarter chain integrations, architecture modernization, and migrations. Improve latency, reliability, and cost for high-throughput distributed systems while owning production services and on-call responsibilities.

Leads software engineering within agile teams by designing, developing, testing, and troubleshooting secure, scalable Java or Python applications. Builds blockchain solutions, including Ethereum smart contracts and decentralized applications, and uses AWS to deploy cloud systems. Contributes to architecture, resiliency, CI/CD, data analysis, and production stability. Drives responsible adoption of AI-assisted engineering tools, establishes validation standards, and coaches engineers on secure and compliant usage.

Own performance optimization, reliability, observability, capacity modeling, and automated failover for Coinbase’s blockchain node infrastructure. Diagnose resource bottlenecks, reduce infrastructure costs, define SLOs and SLIs, support protocol upgrades, and improve node performance across distributed systems at scale. Collaborate with protocol integration, wallet, and indexer teams while applying backend programming and systems profiling expertise.

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.

Lead design and implementation of microservices and blockchain solutions (public/private), verify cryptographic protocols, develop smart contracts, optimize performance, troubleshoot, conduct code reviews, enforce testing/monitoring, adopt enterprise AI-assisted engineering practices, and operate cloud-based infrastructure for secure, scalable payments technology.

Designs and develops blockchain security products, core frameworks, APIs, infrastructure, and automation for large-scale distributed systems. Responsibilities include architecture standards, performance tuning, incident troubleshooting, system refactoring, continuous delivery, capacity management, and reusable libraries. The role also engages users, coordinates with cross-functional teams, and addresses security risks involving blockchain, smart contracts, wallets, and on-chain attacks.

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.

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.

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.

Own end-to-end delivery of enterprise application features involving full-stack development, blockchain integrations, smart contracts, Web3 infrastructure, transaction workflows, and secure scalable architecture. Responsibilities include coding, testing, deployment, performance optimization, cloud reliability, architectural discussions, code reviews, stakeholder communication, and collaboration with Product, UX, and project management teams.

Design, develop, and maintain enterprise blockchain solutions, including Solidity smart contracts, decentralized applications, blockchain APIs, wallet integrations, tokenization platforms, and backend microservices. Integrate applications with blockchain networks and cloud environments, optimize transaction performance, perform security audits, and troubleshoot production issues. Collaborate with architects, security, DevOps, and product teams on architecture, deployment, code reviews, and operational support.

Develop enterprise blockchain applications, smart contracts, decentralized applications, APIs, wallet integrations, tokenization platforms, and blockchain-connected microservices. The role includes integrating Ethereum and other blockchain networks, optimizing and auditing smart contracts, implementing event processing and secure transaction workflows, deploying cloud infrastructure on Azure or AWS, and troubleshooting production systems. Collaboration spans architecture, security, DevOps, and product teams in an Agile Scrum environment.

Design, develop, and maintain enterprise blockchain solutions, including smart contracts, decentralized applications, blockchain APIs, wallet integrations, tokenization platforms, and backend microservices. Integrate applications with blockchain networks and cloud environments, optimize transaction performance, conduct security audits, and troubleshoot production issues. Collaborate with architects, security, DevOps, and product teams on architecture, deployment, code reviews, and operational support.

Build responsive web applications and scalable frontend/backend services, design secure APIs and databases, implement AI-powered search and asset management features, collaborate on system architecture, and optimize performance and UX for a cloud-native DAM platform.

Build and maintain cross-platform React Native mobile apps integrated with blockchain (smart contracts, wallets, tokenization). Implement features for validator registration, asset verification, and marketplace functionality. Collaborate with backend and design teams, ensure security and compliance (KYC, token handling), optimize performance, and support CI/CD and deployment workflows.

Build, deploy, and operate institutional-grade blockchain infrastructure for Barclays’ digital asset platform. Responsibilities include managing blockchain networks, validators, bootnodes, RPC services, connectors, relayers, bridges, monitoring, storage, performance, security, disaster recovery, and operational resilience. The role collaborates with engineering, architecture, security, and platform teams while supporting tokenized deposits, stablecoins, tokenized securities, custody, and settlement use cases across permissioned and open blockchain ecosystems.

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.

Build and operate DevOps, automation, deployment, and observability capabilities for Barclays’ digital assets platform. Deploy and maintain blockchain infrastructure, validators, RPC services, wallet services, signing systems, and middleware across hybrid environments. Automate releases, strengthen security and production readiness, implement monitoring and alerting, and support reliable, scalable operation of tokenized deposits, stablecoins, digital cash, and tokenized securities. Collaborate with engineering, security, infrastructure, architecture, risk, compliance, and operations teams.

Validate and test blockchain and Web3 products across the development lifecycle: create and run test plans, validate smart contract and wallet interactions, test APIs and web platforms, track and verify bugs, collaborate on releases, and improve automation, reliability, performance, and security.

As a Full-Stack Blockchain Engineer, you'll design and implement products, collaborate with teams, and develop secure solutions within Wormhole's ecosystem.

Design, develop, test, audit, and deploy smart contracts and dApps. Integrate wallets, blockchain APIs, and Web3 infrastructure. Optimize for performance and gas efficiency, collaborate with cross-functional teams, monitor production systems, research emerging protocols, and document technical specifications.

Build first-party applications on the Tempo blockchain and integrate Tempo into partner payment systems. Work with production-grade blockchain and money-movement flows, ship reliable systems, collaborate with technical and cross-functional stakeholders, travel to partners as needed, and feed field learnings back to improve product and developer experience.

Build first-party applications and integrations on Tempo, work with customers to integrate stablecoin payment flows, iterate on developer experience, and ship reliable, production-grade blockchain systems.

Supports the design, development, testing, and deployment of blockchain applications, decentralized applications, and smart contracts. Assists with Web3 integrations, APIs, front-end and back-end development, blockchain networks, wallets, nodes, security testing, documentation, and technical research. Collaborates with developers, data scientists, AI engineers, designers, and subject matter experts while gaining hands-on experience with blockchain and distributed ledger technologies.

Build and enhance Citi's Integrated Digital Assets Platform backend. Collaborate on blockchain-based web applications, deliver functional scope, apply enterprise and web3 design patterns, maintain documentation, support solution engineering, and follow best practices for reliability, scalability, and performance in a distributed Agile team.