Cloudflare Logo

Cloudflare

Senior Software Engineer, Durable Objects (DO)

Reposted 3 Days Ago
Hybrid
2 Locations
Senior level
Hybrid
2 Locations
Senior level
The Senior Software Engineer will enhance Cloudflare's Durable Objects API by maintaining performance, implementing features, and ensuring reliability across distributed cloud systems.
The summary above was generated by AI

Available Locations: Austin, Texas | Lisbon, Portugal | London, UK About the Department
Cloudflare's Emerging Technologies & Incubation (ETI) team is where bold, innovative products are built and launched. Rather than being limited by the structures of a large, established business, we leverage Cloudflare's global edge network to solve problems at an unparalleled scale and efficiency.
What You'll Do
In this role, you will build Durable Objects, the Cloudflare Developer Platform's product for building stateful serverless applications. As a member of this top-notch systems engineering team, you will design and develop the low-level routing and storage systems that power Cloudflare's customers' ability to build and scale. Your job is to drive the continual evolution of the system which improves reliability, performance, and provides new features. For a recent summary of these changes take a look at this.
As a key engineer on this team, you will:

  • Build the Durable Objects runtime which enables Cloudflare customers to build real-time chat applications, multiplayer games, and AI agents.
  • Improve reliability, scalability, and performance by developing new system capabilities.
  • Own your code end-to-end from design to production.
  • Solve complex technical challenges with production distributed systems.
  • Develop software in JavaScript, TypeScript, Rust, and C++.

What We're Looking For

  • 5+ years of experience writing systems software.
  • Operational mindset - we don't just write code, we own it in production.
  • Strong foundation in data structures, algorithms, and system design.
  • Deep expertise in at least one systems programming language (e.g., C/C++ or Rust).
  • Experience designing and architecting large-scale distributed systems.
  • Familiarity with cloud platforms, particularly serverless architectures.
  • Experience as a technical leader or team lead, driving engineering decisions.

Bonus Points

  • Experience working on database internals (specifically SQLite).
  • Deep understanding of web technologies (browsers, HTTP, JavaScript, WebAssembly).
  • Background in low-latency, real-time environments (e.g., game streaming, high-frequency trading, payment systems).
  • Experience debugging, optimizing, and identifying failure modes in large-scale Linux-based distributed systems.


This is a high-impact role for engineers who thrive in fast-paced, distributed environments and want to shape the future of cloud computing. If that sounds like you, we'd love to hear from you!

Top Skills

C++
JavaScript
Rust
Typescript

Similar Jobs at Cloudflare

9 Hours Ago
Hybrid
Austin, TX, USA
Mid level
Mid level
Cloud • Information Technology • Security • Software • Cybersecurity
Collaborate with teams to design, build, and maintain scalable systems at Cloudflare, focusing on reliability and performance enhancements.
Top Skills: GoRustTypescript
19 Hours Ago
Hybrid
3 Locations
Mid level
Mid level
Cloud • Information Technology • Security • Software • Cybersecurity
As an AI Engineer, you'll develop AI solutions for Cloudflare's developer platform, enhance AI observability, and collaborate on projects like code generation and model inference.
Top Skills: AIAi ObservabilityCloudflare WorkersEdge ComputingLlms
Yesterday
Hybrid
Austin, TX, USA
Mid level
Mid level
Cloud • Information Technology • Security • Software • Cybersecurity
The Data Center Deployment Engineer will oversee data center build-outs, manage network and server installations, ensure effective documentation, and collaborate with multiple teams to enhance infrastructure performance.
Top Skills: AnsibleAnycastApacheArista EosBgpChefCisco IosCisco Nx-OsCwdmDwdmGoogle SpreadsheetsHaproxyJIRAJuniper JunosLinuxExcelNginxPuppetSaltstackVarnish

What you need to know about the Belfast Tech Scene

If asked to name the birthplace of the RMS Titanic, you might not say Belfast. Similarly, if asked to name Europe's leading destination for foreign direct investment in new software development, Belfast might not come to mind. Yet, both are true. The city has emerged as a tech powerhouse, recently ranked among the best in the U.K. for tech careers — especially for software developers. It also leads the U.K. with the highest percentage of software development jobs advertised.

Sign up now Access later

Create Free Account

Please log in or sign up to report this job.

Create Free Account