Top Tech Jobs & Startup Jobs in London

Develop and maintain Cloudflare’s Rust-based Front Line web server, which processes over 150 million HTTP requests per second. Improve edge availability, safety, reliability, security, deployment frequency, automation, observability, and performance. Collaborate across engineering and product teams to design solutions for large-scale distributed systems and drive continuous operational improvement.

Design, implement, and operate Cloudflare’s S3-compatible R2 API gateway at global scale. Responsibilities include authentication, authorization, routing, rate limiting, error handling, distributed systems development, reliability and observability improvements, deployment, monitoring, incident response, and cross-team coordination. The role also involves on-call participation, postmortems, compatibility with the S3 API, and extensive use of AI tools for development and operations.

Lead and grow the Workers KV engineering team, shaping product features, improving performance, and delivering scalable distributed storage systems. Responsibilities include hiring, onboarding, professional development, planning, execution oversight, process improvement, instrumentation, and resolving delivery blockers. The role partners technical strategy with business goals while building reliable, high-performance developer APIs and infrastructure for Cloudflare’s global edge network.

Drive new-business sales for Cloudflare’s Mid-Market offering across the UKI territory. Responsibilities include identifying target accounts, executing territory plans, managing contract negotiations, maintaining a sales pipeline, developing strategic customer relationships, articulating value propositions, achieving revenue targets, and ensuring customer satisfaction. The role requires approximately 25% travel and engagement with technical and non-technical buyers.

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.

Senior TA Business Partner for GTM hiring in EMEA (SEUR focus). Build end-to-end talent strategies, proactive pipelines for Account Executives and Customer Engineers, advise stakeholders, integrate AI/LLMs to scale sourcing and workflows, leverage recruitment analytics, and lead employer branding to attract GTM talent. French fluency required; Spanish advantageous.