Josh Rosso


I am a Staff Architect at VMware creating value at the intersection of applications and infrastructure. Over the years, I've had the privilege of working in high-performing teams within start-ups to large enterprises. Within these teams, I've worn many hats including team lead, software engineer, architect, and developer advocate. I thrive in teams with an affinity for getting things done, pragmatism, and open source. Since 2016, I've been working in the cloud native ecosystem with a focus on building, running, and managing large-scale Kubernetes clusters in production.

Technical Skills

The following are languages, tools, and systems that I've used in the past year to write software, automate systems, and support applications. This list is by no means exhaustive.

Languages / Automation

Go • Java • Python • C • Typescript • Groovy • Spring • Bash • Ansible • Terraform • Pulumi • k8s-client tooling • Jenkins

Systems / Infrastructure

Kubernetes • Linux • Docker • Containerd • Systemd • Envoy • Baremetal • libvirt • QEMU/KVM • JVM • vSphere • AWS


Staff Architect

11/2018 - Current

VMware (Acquired Heptio)

At VMware, I lead an amazing team of humans responsible for working with enterprises to:

  1. Build application platforms on top of Kubernetes
  2. Run applications (in production) atop Kubernetes

In pursuit of the above, we engage with the world's largest enterprises (financial services, telcos, and retailers) to engineer success on top of Kubernetes. We are a highly-strategic team with years of experience running distributed systems in production. Additionally, this multi-faceted role means each team member must maintain competency in software development, infrastructure, networking, communication, and leadership.

At VMware, I have:

  • Lead Kubernetes architecture at multiple high-scale enterprises, all of which reached production.
  • Co-developed multiple software projects, both open source and private focused on Kubernetes integration to vSphere and application onboarding to clusters.
  • Established our go-to-market strategy around customers needing guidance on production Kubernetes.
  • Lead design on reference architectures for platform concerns on top of Kubernetes, such as container networking and secret management.
  • Mentored many teammates by pairing on both customer project work and software development projects.
  • Spoke about production Kubernetes experiences at multiple conferences and webinars. (See last section)

Staff Field Engineer

03/2018 - 11/2018


At Heptio, I was a member of technical leadership and an individual contributor on a high-performing team. Heptio was created by 2/3 founders of Kubernetes and consisted of many industry leaders. Our focus was to bring upstream Kubernetes to the enterprise.

The field engineering team was considered the "tip of the spear" in that we went into enterprises and helped them fill gaps in the Kubernetes ecosystem. Our team spent the majority of its time writing software to fill deficiencies in Kubernetes along with providing architecture consulting to enterprises.

At Heptio, I had:

  • Lead the architecture of Heptio's largest (multi-million dollar) account. This engagement involved co-development on software along with establishing automation and networking around Kubernetes.
  • Built watch-proxy to support Kubernetes inventory systems for enterprises.
  • Continued upstream contributions to kubeadm, alb-ingress-controller, and bootkube.
  • Established deployment automation atop AWS, baremetal, and KVM.
  • Senior Software Engineer

    10/2016 - 03/2018

    CoreOS & RedHat

    At CoreOS, I was hired as the first Software engineer with the intent of splitting time between engineering and field work. CoreOS was the company that created Container Linux, etcd (datastore of Kubernetes), rkt (container runtime), and Tectonic (Kubernetes distribution). During my time there, I worked with my director to establish a team that grew to over 30 people before being acquired. Our team's focus was primarily helping customers be successful on top of Kubernetes and be active contributors to upstream Kubernetes.

    At CoreOS, I had:

  • Co-developed and maintained the official AWS ALB Ingress Controller.
  • Led CoreOS's largest account as an embedded engineer and architect. This customer was one of the first enterprises to run Kubernetes in production!
  • Contributed upstream to many aspects of Kubernetes.
  • Established initial training programs on advanced Kubernetes topics.
  • Senior Services Engineer

    12/2013 - 10/2016


    At MuleSoft, I started as a services engineer and ended as a senior engineer. Our team's focus was to embed at MuleSoft customers and assist in building Java/Spring-based API and middleware solutions. Along with development, I specialized in performance engineering for many latency-sensitive customers. These scenarios involved extensive performance testing, code optimization, and JVM tuning.

    At MuleSoft, I had:

    • Co-developed an API gateway at MuleSoft's largest account. This API gateway was in the critical data path for all services of this multi-billion dollar enterprise. Performance analysis lead to many JVM optimizations and changes is core mule.
    • Wrote multiple connectors (Java) that established interoperability between mule "flows" and SaaS platforms.
    • Established performance testing practices with a co-workers in the performance engineering group.
    • Contributed to many MuleSoft training courses.
    • Wrote MuleSoft's certification exam.

    Technical Trainer

    07/2012 - 12/2013

    Hyland Software

    At Hyland Software, I was hired to provide internal technical training to all software developers and professional services teams to ensure their success atop OnBase. During my time at Hyland, I embedded myself amongst software engineering groups and did immense amounts of self-study to establish my development skills. Overtime, I was able to contribute to products, projects, and PoCs inside Hyland. This made clear my love for software development and lit the fire to get involved in teams doing development in the context of to-be production workloads. Thus, my eventual move to MuleSoft.

    Projects, Community, and Talks

    Along with my day job, I love staying involved in open source communities and teaching topics around software/infrastructure engineering.

    Open Source Projects
    Conference Talks
    Online Content