Douglas Spencer, Software Developer in Sioux Falls, SD, United States
Douglas Spencer

Software Developer in Sioux Falls, SD, United States

Member since November 6, 2018
Douglas is an experienced consultant focused on DevOps, site reliability engineering, Kubernetes, Istio, Jenkins CI/CD, Linux, cloud, and automation. He has a range of skills gained from decades as a consultant that enable him to bring successful outcomes to difficult projects. Douglas currently has a publishing contract with a technical publisher and is writing an advanced Linux book.
Douglas is now available for hire

Portfolio

Experience

  • Perl, 20 years
  • Bash, 20 years
  • Linux, 20 years
  • Git, 15 years
  • DevOps, 6 years
  • Docker Compose, 3 years
  • Google Kubernetes Engine (GKE), 2 years
  • Terraform, 2 years

Location

Sioux Falls, SD, United States

Availability

Part-time

Preferred Environment

Linux, Git, VIM, Terraform, Kubernetes, Docker

The most amazing...

...project I have worked on delivered more than 23x revenue growth for a client while reducing their ongoing costs.

Employment

  • DevOps and SRE Consultant

    2007 - PRESENT
    Solo Workforce, Inc.
    • Implemented DevOps and Site Reliability Engineering for multiple clients resulting in improved agility in development, improvements in stability, and revenue growth exceeding 23x.
    • Implemented Site Reliability Engineering that improved availability to exceed 5 nines.
    • Experienced with Linux back to the 0.8x kernel versions circa 1993 and all major distributions.
    • Awarded Brainbench Most Valuable Professional for Linux Administration by scoring in the top 1% worldwide.
    • Received Brainbench Most Valuable Professional for Networking Concepts by scoring in the top 1% worldwide.
    • Achieved Brainbench Most Valuable Professional for Internet Security by scoring in the top 1% worldwide.
    • Experienced with a wide range of industries, from aviation to startups and technology.
    Technologies: Docker, Terraform, Kubernetes, Istio, Helm, Perl, Bash, Linux

Experience

  • USPS.COM Migration/DevOps/Site Reliability Enginering (SRE) Project (Development)
    http://usps.com

    USPS is not covered by NDA, so I can discuss it freely. As a result of my involvement in the USPS.COM project, outages improved from occurring weekly to having 99.999%+ availability. DevOps and SRE efforts were very successful and resulted in more than 23x revenue growth while reducing operational overhead by approximately 50%.

  • AWS to GCP Migration/DevOps (Development)

    Worked within a team environment to meet client's business objectives to migrate away from AWS to GCP.

    Designed and created the GCP environment using:

    * Terraform to deploy and manage infrastructure as code

    * Google Kubernetes Engine (GKE)

    * Helm to package resources and configurations to deploy to GKE

    * Istio for security, monitoring, traffic shaping, Canary tests, CI/CD process improvement

    * Hashicorp Vault in a highly available configuration for secured secrets management

    * Jenkins deployed using Configuration as Code to scale worker nodes for large parallel code deployments to container builds using Hashicorp Packer to create Docker compact and secured Docker containers

    * Spinnaker for continuous deployment and testing

    * Migrated from Bitbucket to Github to improve webhook handling and improve the CI/CD process

Skills

  • Languages

    Perl, Bash, PHP, PHP 7, PHP 5+, PHP 5, C, SQL, Python, Python 3, Ruby, Java, C++, Solidity
  • Frameworks

    Catalyst, AWS HA, OAuth 2, Ruby on Rails 5, CFEngine 3
  • Libraries/APIs

    OpenID, OpenSSL, jQuery, Facebook Login
  • Tools

    Amazon SQS, AWS CLI, AWS SES, Terraform, Google Kubernetes Engine (GKE), Puppet, ELK (Elastic Stack), Docker Compose, Docker Swarm, Git, Subversion (SVN), CVS, KVM/Qemu, Veritas Cluster Server, Shibboleth, OpenSSH, Grafana, Apache, Azure Kubernetes Service (AKS), Nagios, VMware, CircleCI, Travis CI, GitHub, Android Studio
  • Paradigms

    DevOps, Scrum, Agile, ETL
  • Platforms

    Linux, Embedded Linux, Ubuntu Linux, Kubernetes, AWS EC2, Xen, Docker, Moose, KVM, Solaris, AIX, KornShell, Debian, Debian Linux, Heroku, Google Cloud Platform (GCP), Ubuntu, Apache2, Oracle, Blockchain, Blockchain Platforms, OpenStack, Red Hat OpenShift, AIXL
  • Storage

    MySQL, MySQLi, MySQL DBA, AWS S3, AWS RDS, Linux File Systems, Data Centers, SQLite, MariaDB, PostgreSQL, PostgreSQL 10.1, Veritas Volume Manager
  • Other

    Relational Database Services (RDS), Bash Scripting, perlpod, Site Reliability, Linux IPC, Linux System Administration, Linux System Calls, Amazon Mechanical Turk, Data Center Infrastructure, Scripting, Automation Scripting, Shell Scripting, Scripting Languages, Scraping, Web Scraping, Data Scraping, Security, Security Audits, Security Testing, Security Planning, PKI, Cryptography, QA Automation, QA Test Plan Management, Identity & Access Management (IAM), LDAP, OAuth, Network Security, Network Protocols, Debian Packaging, Futures & Options, Futures, Trading Systems, Options Trading, Stock Trading, Algorithmic Trading, Algorithmic Trading Analysis, Aviation, IoT Security, IoT Protocols, SSH, Prometheus, Kubernetes Expert, RTMP

Education

  • Bachelor of Science degree in Computer Science
    1992 - 1996
    Illinois Institute of Technology - Chicago, IL

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