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Customer Engineer (Pre-Sales), Korea (Based in Seoul)

Backend Developer • On-site • Full-time • 📍 Hybrid

The Customer Engineer is the core driver of Cloudflare's technical go-to-market strategy, owning the technical relationship from initial discovery through long-term adoption and account expansion as a quota-carrying technologist using AI-augmented workflows.

Responsibilities

  • Technical Validation: partner closely with Account Executives to lead technical discovery, build bespoke architectures, and deliver product demonstrations and PoCs across Cloudflare's portfolio (Security, Networking, Developer Platforms)
  • Trusted Advisory: act as a trusted technical advisor throughout the customer lifecycle, maintaining relationships with key stakeholders from onboarding through maturity, renewal, and expansion
  • Strategic Alignment: own the long-term technical relationship, ensuring continuous alignment between the customer's business goals and the product roadmap
  • Commercial Accountability & Expansion: carry a variable quota tied to new business acquisition and account growth; be accountable for platform adoption, revenue retention, and cross-sell/up-sell opportunities based on product usage data
  • Lead technical Quarterly Business Reviews (QBRs), translating platform capabilities into ROI for C-level executives
  • AI Orchestration & Workflow Automation: leverage AI agents and internal platforms to automate routine tasks such as RFP/security questionnaire responses, sandbox provisioning, and basic telemetry monitoring

Requirements

  • Experience in a customer-facing technical role (Solutions Engineering, Customer Engineering, Sales Engineering, or Forward Deployed Engineer) — years required vary by level
  • Broad technical expertise spanning web security, networking (routing, DNS, DDoS mitigation), cloud infrastructure, and enterprise architecture
  • Cloudflare Developer Stack experience: hands-on building, deploying, or architecting solutions using Workers AI and AI Gateway
  • Applied AI knowledge: prompt engineering, LLM orchestration, or Retrieval-Augmented Generation (RAG) architectures
  • Coding/scripting proficiency in Python, JavaScript, or similar languages for custom integration scripts, API connectors, and edge computing functions

Soft skills

Commercial mindset: proven track record in a quota-carrying or revenue-aligned environment, strong understanding of SaaS metrics, business value translation, and enterprise sales cyclesExceptional presentation and stakeholder management skills, bridging deep technical detail and C-suite business strategy

About the company

Cloudflare runs one of the world's largest networks, protecting and accelerating internet applications for millions of websites without requiring new hardware or code changes. The company has been named to Entrepreneur Magazine's Top Company Cultures list and ranked among Fast Company's Most Innovative Companies. Cloudflare also runs mission-driven programs like Project Galileo and the Athenian Project, plus the free 1.1.1.1 public DNS resolver.

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