Ranjib Dey

About myself

Public profile for Ranjib Dey across production engineering, reliability, infrastructure automation, open source, and reef-pi.

Hello

I am Ranjib Dey, a software engineer focused on production engineering, infrastructure automation, reliability, incident management, and open source systems. My public work spans infrastructure-as-code, testing discipline for operations, Linux containers, service discovery, ML-assisted capacity management, and hardware automation.

I currently work on production engineering at Uber. Public artifacts from this era include Uber Engineering Blog work on ML-driven capacity safety and capacity recommendation, talks on incident taxonomy and incident management, and a co-authored USENIX NSDI 2026 paper on Uber’s failover architecture.

This site is personal writing and public project context. The views here are my own.

Earlier public work includes Chef and DevOps infrastructure automation at ThoughtWorks and PagerDuty. I was an open source maintainer of Chef, received the Chef Awesome Community Member / MVP award, authored chef-lxc, and wrote and spoke about testing infrastructure code, TDD in operations, CI/CD for Chef, LXC, and Consul.

Outside work, I build and maintain reef-pi, an open source Raspberry Pi based reef tank controller. reef-pi has grown from a hobby automation project into a public ecosystem with official guides, community support, hardware integrations, Maker Faire recognition, and coverage from Make:, Adafruit, and the Raspberry Pi Foundation.

Public work themes

  • Infrastructure as code and configuration management with Chef.
  • Testing discipline for operations, including ChefSpec, Test Kitchen, Serverspec/InSpec, and CI for infrastructure code.
  • Linux containers and early LXC-based build and deployment workflows.
  • Service discovery and platform engineering with Consul and distributed systems tooling.
  • SRE, incident management, resiliency engineering, and incident taxonomy.
  • Capacity management and ML-assisted operations at hyperscale.
  • Physical computing, IoT, and open source reef automation through reef-pi.

Public speaking, papers, and blogs

  • Culturing resiliency with Data: A taxonomy of incidents. ChaosConf, 2020. InfoQ
  • How Uber does incident management. Major Incident Management Expo, 2020.
  • Using ML for microservice capacity safety. Uber Engineering Blog, 2019. Uber Engineering
  • Uber’s Failover Architecture: Reconciling Reliability and Efficiency in Hyperscale Microservice Infrastructure. USENIX NSDI 2026. USENIX
  • Consul at PagerDuty. HashiCorp User Group SF, 2016. Slides
  • Strategies for adopting Test Driven Development in operations. Agile 2015, Washington, D.C. Slides, experience report
  • Extending CI/CD in operations using Chef and LXC. LinuxCon North America, 2015. Slides
  • Chef at PagerDuty. PagerDuty Engineering Blog. Post
  • Chef-LXC: Building and deploying custom containers. Bay Area Chef Meetup, 2013. Slides
  • A short introduction to LXC. Bay Area Large Scale Production Engineering group, 2014. Slides
  • How to mock a mocking bird: testing dynamic infrastructure. ChefConf, 2014. Slides
  • Attaining Resiliency: Culture, Tools and Practices. DevopsDays India, 2013. Slides
  • Automated infrastructure testing. vodQA-10, Pune, 2012. Slides
  • System automation using Chef. FudCon Pune, 2011.
  • DZone blogs on web operations, CI/CD, and Chef.

Profiles and projects