Top Tech Jobs & Startup Jobs in London

Design, build, and operate globally distributed storage systems; own code from design to release; provision and benchmark storage hardware; model failure domains; build observability, runbooks, and automation; collaborate across teams to ensure reliability, performance, and scalability.

Design and implement foundational layers of next-generation distributed storage and streaming systems. Own code end-to-end, architect consistency models, optimize storage engine performance, design data-centric APIs, and debug complex race conditions, partitions, and infrastructure-level failures. Work across system layers using Rust/C++ and interact with JavaScript/TypeScript as needed.

Build and maintain Cloudflare’s globally distributed Quicksilver key-value store using Go and C. Develop features, improve CPU and memory performance, enhance monitoring and operational tooling, and debug complex, hard-to-reproduce issues across the software stack. Responsibilities include code reviews, testing, deployments, rollbacks, operations, alerting, and on-call support for a system operating across tens of thousands of servers and hundreds of data centers.

Oversee Cloudflare’s global privacy and responsible AI compliance programs across EMEA. Advise on data protection laws, cross-border transfers, privacy by design, data subject requests, impact assessments, vendor reviews, data processing agreements, M&A due diligence, incidents, and AI regulations. Develop guidance, playbooks, and FAQs while partnering with product, commercial, corporate legal, and data privacy operations teams.

Lead productionization and optimization of ML models for a global, serverless inference platform. Build benchmarking/evaluation tooling, improve inference performance (quantization, compilation, batching), integrate models with heterogeneous GPUs and accelerators, enhance deployment workflows and observability, and mentor engineers while driving ML production best practices.

Conduct vulnerability scanning and in-depth analysis, triage and prioritize findings, produce remediation guidance, track remediation progress, and ensure processes and evidence meet DoD IL4 and FedRAMP compliance requirements while collaborating with engineering and compliance teams.

Lead product security assessments, threat model features, triage and own vulnerability lifecycle from bug bounty, SAST, fuzzing, and pentests. Build AI/LLM-driven automation and tooling to scale triage and enrichment, mentor engineers, and influence security across distributed cloud products.

Lead and automate Cloudflare's Deal Desk by architecting AI-driven approval workflows, structuring complex enterprise deals, advising Sales on pricing/terms, tuning AI agents, and partnering cross-functionally to reduce friction and improve deal velocity and long-term value.

Conduct threat models and security reviews for Cloudflare products, triage and manage vulnerability lifecycle (bug bounties, SAST, fuzzing, pentests), build AI/LLM-driven automation tooling for triage and enrichment, coordinate pentests and remediation with engineering, and act as the product security point of contact.

Generate pipeline and qualify inbound and marketing leads for Sales by creating excellent customer experiences, mapping customer pain to Cloudflare solutions, meeting quota, tracking activity in Salesforce (SFDC), and collaborating with account executives and stakeholders. Role requires Danish, Norwegian, or Swedish language skills and is based in Lisbon on a hybrid schedule.