Blockchain Engineer

• Define and drive the multi-quarter technical strategy for Blockchain Platform, spanning nodes, wallets, indexing, and asset lifecycle, to support new chains, new products, and significant growth in onchain transaction volume.
• Architect and evolve the core Blockchain Platform infrastructure - nodes, indexers, wallet systems, and liquidity primitives - for high availability, low latency, cost efficiency, and security at global scale.
• Lead end-to-end design and rollout of large, cross-team architectural initiatives (e.g., wallet stack rearchitecture, indexing stack redesign, asset identifier system), breaking high ambiguity into clear milestones and measurable outcomes.
• Set and enforce technical standards for correctness, security, and reliability across all crypto asset operations, including transaction finality, key management, reconciliation, and failure-mode handling for all onchain flows.
• Drive engineering efficiency across the org - defining standards for testing, quality, automation, and observability, and championing AI-native approaches that reduce operational burden and enable agents to serve as front-line operators.
• Use data and observability signals (e.g., transaction success rates, node reliability, indexing latency, on-call burden) to identify structural platform gaps and lead systematic reliability and efficiency improvements.
• Represent Blockchain Platform in executive and cross-org forums, clearly communicating tradeoffs, aligning stakeholders on strategy, and securing buy-in for high-impact technical bets including emerging areas like Yield and Stablecoins.

Senior Staff Software Engineer – Blockchain Platform

• As a Blockchain Developer, you are responsible for developing application features and interfaces using blockchain technology
• You will be also responsible for designing and developing a system that is secure, reliable and scalable
• Your primary goal for this job role will be designing, implementing, and administering a secure blockchain network
• Architect, develop and deploy decentralized applications providing permissioned access to data at both the smart contract and protocol level
• Develop & Interacting with Smart Contracts implemented on most common Blockchain/DLT technology platforms
• Oracle development (connecting "off-chain" data to the blockchain)
• Collaborate closely with the rest of the engineering team to review application requirements, help plan implementation details and estimate delivery timelines

Senior Blockchain Developer

• Engineer distributed system components such as consensus logic, memory-mapped databases, networking stacks, and synchronization logic to be performant, safe, and correct.
• Support our infrastructure engineers in maintaining our monitoring and alerting stack to ensure high uptime and streamlined debugging. Participate in an on-call rotation to respond promptly to production incidents and outages.
• Make protocols accessible to product teams by wrapping key functionality in clean interfaces and APIs.

Senior Protocol Engineer

• Define and execute the product strategy, roadmap, and vision for blockchain-based payments
• Identify and prioritize opportunities to enhance payment capabilities, including cross-border payments, real-time settlement, and emerging digital asset use cases
• Lead end-to-end product delivery, from concept through implementation and ongoing optimization
• Partner with technology teams to design and deliver scalable, resilient, and secure payment solutions
• Collaborate across business lines and enterprise functions, including Risk, Legal, Compliance, and Operations, to ensure alignment and regulatory adherence
• Manage complex, cross-functional initiatives and ensure timely delivery of product outcomes
• Evaluate emerging technologies, platforms, and vendor solutions to support product capabilities
• Support go-to-market efforts, including stakeholder alignment, client engagement, and product enablement
• Monitor industry trends and regulatory developments in payments and blockchain to inform product direction
• Communicate product strategy, progress, and outcomes to senior leaders and key stakeholders

Blockchain Payments Product Lead

• Conduct end-to-end security assessments across blockchain protocols, smart contracts, cryptographic systems, and infrastructure.
• Identify real-world vulnerabilities through manual review, adversarial testing, and proof-of-concept exploit development.
• Design and execute security testing strategies for protocol components, cross-chain bridges, and distributed systems.
• Lead threat modeling exercises and security architecture reviews.
• Define and enforce security gates throughout the software development lifecycle.
• Collaborate closely with engineering teams to prioritize and remediate security risks.
• Build and improve security tooling, fuzzing frameworks, and CI/CD security automation.
• Research emerging Web3 attack vectors and proactively mitigate potential threats.

Product Security Engineer – Blockchain Security

• Design and build distributed systems that tolerate latency, bandwidth constraints, and intermittent connectivity.
• Implement fault-tolerant communication strategies, retry logic, backpressure, caching, and eventual consistency patterns.
• Write maintainable, resilient, and tested code following development standards and methodologies.
• Debug and improve system behavior, including networking and distributed coordination issues.
• Contribute to systems written primarily in Rust.
• Work with system-level concerns including scheduling, memory management, I/O optimization, storage hierarchy management, and system reliability.
• Optimize performance and memory usage in resource-constrained environments.
• Debug concurrency issues and distributed coordination challenges.
• Design and maintain APIs and communication layers between distributed components.
• Identify and reduce tight coupling across services and systems.
• Diagnose and resolve cross-system failures in production environments.
• Design and implement secure, reliable solutions aligned with engineering standards.
• Collaborate with engineers and computer scientists on operating systems internals, compiler internals, fault tolerance, file system architecture, and trusted systems.
• Contribute to resolving architectural and systemic issues.
• Continue developing expertise in distributed systems, HPC infrastructure, and related tooling.

Distributed Systems Engineer

• Develop and enhance our customer-facing APIs focusing on performance, reliability, and an intuitive user experience.
• Design, build, and maintain our near real-time alerting platform, from data processing and anomaly detection to reliable notification delivery.
• Optimise the performance of complex analytical queries that power our APIs and dashboards, working closely with the database platform team.
• Create intuitive and powerful tools that allow customers to explore their data and configure meaningful alerts based on logs and metrics.
• Scale our API and alerting infrastructure to support a growing number of internal and external use cases.
• Collaborate with front-end engineers and product managers to define API contracts and deliver a seamless data experience for our users.
• Ensure the operational health of our APIs and alerting systems by developing comprehensive monitoring, and participating in an on-call rotation (with the flexibility to be on-call outside of standard working hours as needed).

Distributed Systems Engineer – Data Platform, Analytics and Alerts

• Design, develop, and maintain scalable and reliable distributed systems across the entire data lifecycle.
• Build and optimise key components of our high-throughput data delivery platform to ensure data integrity and low-latency delivery.
• Develop new and improve existing components for the Cloudflare Analytical Platform to extend functionality and performance.
• Scale, monitor, and maintain the performance of our large-scale database clusters to accommodate the growing volume of data.
• Develop and enhance our customer-facing GraphQL APIs, log delivery, and alerting solutions, focusing on performance, reliability, and user experience.
• Work to identify and remove bottlenecks across our data platforms, from streamlining data ingestion processes to optimizing query performance.
• Collaborate with other teams across Cloudflare to understand their data needs and build solutions that empower them to make data-driven decisions.
• Collaborate with the ClickHouse open-source community to add new features and contribute to the upstream codebase.
• Participate in the development of the next generation of our data platforms, including researching and evaluating new technologies and approaches.

Distributed Systems Engineer – Data Platform, Delivery, Database, Retrieval

• Design, build, and operate a robust logging platform, ensuring reliable logging, and secure data transfer to a wide array of customer destinations and third-party integrations.
• Develop and maintain high-performance data connectors and integrations for our log-shipping products, focusing on usability, scalability and data integrity.
• Create and manage systems for handling comprehensive audit logs, ensuring they are delivered securely and adhere to strict compliance and performance standards.
• Scale and optimise the data delivery pipeline to handle massive data volumes with low latency, identifying and removing bottlenecks in data processing and routing.
• Work closely with Product and other engineering teams to define requirements for a new logging platform and integrations.
• Maintain the operational health of our log delivery platform through comprehensive monitoring and participation in an on-call rotation (with flexibility for out-of-hours technical issue resolution).
• Collaborate on the architectural evolution of our data egress platform, researching and implementing new technologies to improve efficiency and reliability.

Distributed Systems Engineer – Data Platform, Logs and Audit Logs

• Develop and implement new platform components for the Cloudflare Analytical Database Platform to improve functionality and performance.
• Add more database clusters to accommodate the growing volume of data generated by Cloudflare products and services.
• Monitor and maintain the performance and reliability of existing database platform clusters, and identify and troubleshoot any issues that may arise.
• Work to identify and remove bottlenecks within the analytics database platform, including optimizing query performance and streamlining data ingestion processes.
• Collaborate with the ClickHouse open-source community to add new features and functionality to the database, as well as contribute to the development of the upstream codebase.
• Collaborate with other teams across Cloudflare to understand their data needs and build solutions that empower them to make data-driven decisions.
• Participate in the development of the next generation of the database platform engine, including researching and evaluating new technologies and approaches that can improve the database's performance and scalability.

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