The Senior Software Engineer will enhance Cloudflare's Durable Objects API by maintaining performance, implementing features, and ensuring reliability across distributed cloud systems.
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:
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!
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++.
- 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.
- 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
Cloudflare Boston, Massachusetts, USA Office
Boston, MA, United States
Similar Jobs at Cloudflare
Cloud • Information Technology • Security • Software • Cybersecurity
Lead the Performance Engineering team, ensuring system performance excellence through tools development, cross-functional initiatives, and team management.
Top Skills:
BashCGoGrafanaJIRALinuxPrometheusPythonRust
Cloud • Information Technology • Security • Software • Cybersecurity
The Access Software Engineer will develop a Zero Trust platform focusing on user identity and trust for secure application access within a global edge network.
Top Skills:
BigQueryClickhouseElasticsearchGoGrafanaKibanaKubernetesPostgresPrometheusReactRustTypescript
Cloud • Information Technology • Security • Software • Cybersecurity
As a Senior Systems Engineer, you'll design and deliver software for system performance, guide teams in optimizations, and improve service reliability.
Top Skills:
AnsibleChefGoLinuxMySQLNginxPostgresPuppetSaltstackSQLUnix
What you need to know about the Boston Tech Scene
Boston is a powerhouse for technology innovation thanks to world-class research universities like MIT and Harvard and a robust pipeline of venture capital investment. Host to the first telephone call and one of the first general-purpose computers ever put into use, Boston is now a hub for biotechnology, robotics and artificial intelligence — though it’s also home to several B2B software giants. So it’s no surprise that the city consistently ranks among the greatest startup ecosystems in the world.
Key Facts About Boston Tech
- Number of Tech Workers: 269,000; 9.4% of overall workforce (2024 CompTIA survey)
- Major Tech Employers: Thermo Fisher Scientific, Toast, Klaviyo, HubSpot, DraftKings
- Key Industries: Artificial intelligence, biotechnology, robotics, software, aerospace
- Funding Landscape: $15.7 billion in venture capital funding in 2024 (Pitchbook)
- Notable Investors: Summit Partners, Volition Capital, Bain Capital Ventures, MassVentures, Highland Capital Partners
- Research Centers and Universities: MIT, Harvard University, Boston College, Tufts University, Boston University, Northeastern University, Smithsonian Astrophysical Observatory, National Bureau of Economic Research, Broad Institute, Lowell Center for Space Science & Technology, National Emerging Infectious Diseases Laboratories
