Full-Time

Principal VM Engineer

Workers Runtime Team

Confirmed live in the last 24 hours

Cloudflare

Cloudflare

5,001-10,000 employees

Provides CDN, security, and serverless solutions

No salary listed

Senior, Expert

Company Historically Provides H1B Sponsorship

London, UK + 2 more

More locations: Austin, TX, USA | Munich, Germany

Category
Backend Engineering
Software Engineering
Required Skills
JavaScript
Data Structures & Algorithms
C/C++
Linux/Unix
Requirements
  • 6+ years of professional experience with C++.
  • 4+ years of hands-on VM/compiler experience, ideally with V8.
  • Strong knowledge of computer science fundamentals, including data structures, algorithms, and system architecture.
  • Experience with low-latency environments (e.g., game streaming, trading systems, high-performance computing).
  • Operational mindset – you build scalable, production-ready solutions.
  • Deep understanding of web technologies (HTTP, JavaScript, WASM).
Responsibilities
  • Optimize and embed the V8 VM within Cloudflare’s Workers Runtime.
  • Improve JavaScript execution performance and WebAssembly integration.
  • Debug, optimize, and enhance low-latency, real-time environments.
  • Ensure the reliability and efficiency of large-scale, Linux-based distributed systems.
  • Collaborate with engineers across runtime, security, and networking teams to push the boundaries of edge computing.
Desired Qualifications
  • Experience working with Rust in high-performance distributed systems.
  • Familiarity with serverless platforms and cloud computing.
  • Deep knowledge of JS engine internals (V8, SpiderMonkey, JavaScriptCore).
  • Experience with standalone WebAssembly runtimes (Wasmtime, Wasmer, Lucet).
  • Strong expertise in Linux/UNIX systems, kernels, and networking.
  • Contributions to large open-source projects.

Cloudflare provides services that improve the performance, security, and reliability of websites and applications. Their main product is a content delivery network (CDN) that speeds up the delivery of web content to users worldwide. They also offer security services to protect against cyber threats like DDoS attacks and data breaches. Additionally, Cloudflare has serverless computing solutions that allow developers to run code without managing servers, making development easier and more cost-effective. What sets Cloudflare apart from competitors is their freemium business model, which offers basic services for free to attract users, while charging for premium features and advanced services. This approach has helped them build a large user base, including individual developers, small businesses, and large enterprises. Cloudflare's goal is to enhance the internet experience by providing essential tools and services that ensure faster, safer, and more reliable online interactions.

Company Size

5,001-10,000

Company Stage

IPO

Headquarters

San Francisco, California

Founded

2009

Simplify Jobs

Simplify's Take

What believers are saying

  • Rising demand for serverless computing boosts Cloudflare's platform innovation.
  • Edge computing growth benefits Cloudflare's distributed computing solutions like Workers.
  • Zero-trust security trends align with Cloudflare's identity-based SSH tools.

What critics are saying

  • Emerging CDN providers may impact Cloudflare's market share and pricing strategy.
  • Rapid serverless computing advancements require continuous innovation from Cloudflare.
  • Arroyo acquisition may face integration challenges, delaying benefits for Cloudflare.

What makes Cloudflare unique

  • Cloudflare's Workers VPC enables secure, global cross-cloud application development.
  • The acquisition of Arroyo enhances Cloudflare's serverless SQL stream processing capabilities.
  • Cloudflare's OPKSSH tool offers identity-based single sign-on for SSH, enhancing security.

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Benefits

Competitive salaries

Take-what-you-need paid vacation policy

Comprehensive health plans and benefits

Paid maternity and paternity leave

Commuter and ride share options

Returnships

Growth & Insights and Company News

Headcount

6 month growth

-1%

1 year growth

0%

2 year growth

0%
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