Top Blockchain Developer Jobs

Perform guided audits of smart contracts, blockchain protocols, and dApps to identify and remediate vulnerabilities. Contribute to security tooling and research, explore attack vectors, and support process and methodology improvements under senior guidance.

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.

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, 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.

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, architect, and build enterprise Java microservices and APIs; lead technical delivery, mentor engineers, implement cloud-native and CI/CD practices, design database schemas and PL/SQL, and develop blockchain/digital-asset solutions including smart contract work and lifecycle integration in financial services.

Design and build Java-based, messaging and microservice applications. Lead API design, cloud/container solutions (Docker, Kubernetes, AWS/Azure), CI/CD, and relational database development (DB2/Oracle). Provide technical leadership, mentoring, code reviews, and resolve cross-technology roadblocks. Work on blockchain and digital asset solutions (Ethereum, Solana) and smart contracts (Solidity, Rust, Move) within financial services.

Lead ownership of Groma's on‑chain stack: design, build, deploy, and maintain smart contracts on EVM networks and integrate them with backend (Django/Python, Postgres, Google Cloud) and frontend (React/TypeScript). Act as the first full‑time blockchain hire, work cross‑functionally with stakeholders, and guide technical direction while moving quickly in a startup environment.

Build and maintain high-throughput transaction and wallet infrastructure for on-chain/off-chain flows. Design transaction lifecycle, retry/rebroadcast and recovery strategies, support cross-chain and DeFi integrations, improve observability and operational guardrails, and own end-to-end engineering, incident response, and reliability for financial correctness and auditability.

As a Staff Backend & Platform Engineer, you'll design and operate identity management, financial operations systems, and blockchain infrastructure, ensuring high reliability and security.

As a Senior Backend & Platform Engineer, you'll design and operate critical systems in identity management, financial operations, and blockchain infrastructure while leading projects and mentoring engineers.

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

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.

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

Design, develop, test, and deploy Web3-native components for Citi's digital asset platform, including smart contracts, blockchain integrations, wallet and custody integrations, event-driven backend services, protocol connectors, and CI/CD/deployment automation. Collaborate with architects and engineers, perform code reviews and audits, and maintain secure, scalable production-grade Web3 infrastructure for institutional finance.

Design, develop, test, and deploy Web3 components and backend services for Citi's digital asset platform. Build smart contracts, blockchain protocol connectors, event-driven systems, wallet integrations, and custody/tokenization integrations. Collaborate in a distributed Agile team, perform code reviews, maintain security best practices, and contribute architecture and documentation for production-grade institutional Web3 infrastructure.

Build and maintain high-throughput blockchain transaction infrastructure: broadcasting pipelines, wallet and lifecycle management, cross-chain and DeFi integrations, failure recovery, observability, and financially correct, auditable systems. Take end-to-end ownership from design through incident response to improve reliability and scale.

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.

The Blockchain Site Reliability Engineer is responsible for maintaining blockchain nodes' reliability, monitoring, incident response, and building automation tools to enhance operations.

The Core Blockchain Engineer will design, build, and scale Ethereum services, improving EVM Node solutions and enhancing tooling for maintainability and reliability.

As a Blockchain Developer, you'll design and develop scalable EVM-based solutions for Conduit's platform, improving Node and tooling for onchain compute.

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.