Top Blockchain Developer Jobs

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.

Develop, test, deploy, and maintain Ethereum/EVM blockchain applications, smart contracts, and Web3 integrations. Collaborate with engineering, product, compliance, and security teams to deliver secure, scalable software. Translate business requirements into quality code, participate in design discussions and code reviews, troubleshoot production issues, and improve automation and development practices. Support cloud-native, containerized applications while applying secure coding and operational excellence standards.

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.

Design, develop, and support production-grade smart contracts, Ethereum/EVM applications, and Web3 integrations. Lead architecture and technical design, ensure scalability and security, participate in code and architecture reviews, mentor engineers, evaluate blockchain technologies, and build cloud-native services using containerization and CI/CD. Collaborate with product, compliance, security, and engineering teams while advancing testing, automation, software quality, and operational excellence.

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.

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.

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.

Develop enterprise blockchain applications, smart contracts, decentralized applications, blockchain APIs, wallet integrations, tokenization platforms, and transaction-processing services. Build scalable microservices and blockchain integrations across Ethereum and other platforms, implement security testing and contract audits, optimize performance, and deploy cloud-native infrastructure on Azure or AWS. Collaborate on architecture, DevOps, production support, and troubleshooting of distributed blockchain systems.

Senior individual-contributor backend engineer responsible for designing, building, and operating production-grade, highly available, strongly consistent services for wallet operations, transaction orchestration, blockchain integrations, and event-driven workflows. Implement secure, scalable APIs, cryptographic key management, Kafka-based event systems, observability with OpenTelemetry, CI/CD pipelines, and produce tests, API specs, and operational runbooks.

Build and maintain secure blockchain applications across custody contracts, transaction signing, orchestration, and key management. Own features end to end, contribute to technical design, coordinate delivery, review code, investigate production issues, and collaborate with neighboring systems. The role requires strong blockchain and cryptography knowledge, automated testing, AI coding assistant experience, clear communication, and the ability to work remotely across U.S. or Canada.

Design, build, and operate high-throughput blockchain infrastructure using Go and Rust. Own distributed systems end to end, including architecture, performance optimization, security, testing, deployment, observability, incident response, and reliability. Lead technical designs and code reviews, mentor engineers, debug complex production issues, and collaborate across Product, Infrastructure, Security, and Developer Experience teams.

Develop backend blockchain functionality for Cardax DEX on the Cardano blockchain. Write and maintain smart contracts in Plutarch and Haskell that define the constraints and conditions for decentralized token exchange without a central entity.

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.

This role involves designing and building next-gen payments platforms using blockchain and AI technologies, focusing on payment modernization, security, and regulatory compliance.

Build foundational blockchain infrastructure for a high-performance trading platform. Responsibilities include implementing consensus protocols and state machines, integrating Ethereum-compatible execution clients, developing cryptographic validator authentication and signature aggregation, optimizing block times and transaction throughput, improving state storage, and designing scalable P2P systems. The role requires strong Rust, distributed systems, cryptography, networking, and low-level storage expertise, with in-person collaboration and U.S. work authorization.

Build and operate DeFi yield vaults, including Solidity smart contracts, backend services, NAV and redemption systems, automated on-chain operations, monitoring, and risk tooling. Review new protocols, assess security and yield strategies, manage rebalancing transactions, collaborate with auditors, and help ensure vaults operate safely around the clock.

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 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.

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.

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.

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.