Philip Budne, Consultant

Specialties:

• Un*x wizard; over 30 years professional experience with Unix/BSD/Linux systems programming and system management
• TCP/IP protocol implementation and application development
• Making things work (practical orientation)
• Quality, Reliability, Scalability, Delivery on time
• Wading into, and draining swamps
• Porting (applications, drivers) to new Unix/Linux distributions
• Python2 to Python3 ports
• Amazon Web Services: EC2/ASG/SQS/DynamoDB/Redshift
• Low level programming: device drivers, kernel development, hardware interfacing
• Respecting and adapting adapting existing code and infrastructure
• Doing the nasty, gnarly stuff other people don't want to do
• Parsers, Little Language implementations
• Crafting tools, scripts, and little languages to help get the job done
• Odd jobs: No job too small, no mess too large

Independent Consulting/Contracting
(December 1993 - present)

Recent Clients:

LoopUp (April 2017-Mar 2021)

• Ported large VoIP/SIP based voice conferencing system from RHEL5 to RHEL7, and then to RHEL8, controlling all build/runtime parameterization in a single config file per target system.
• Diagnosed Linux ethernet driver issues on Linux using perf and flame graphs.
• pthread parallelization of VoIP Media Control Unit (MCU) in C.
• Wrote open source C library for lightweight prometheus monitoring (on github).
• Added lightweight Prometheus monitoring and alerts to system.
• Wrote Python test tools for use by developers and Q/A.
• Created scripts for podman (Docker) server image creation.

TELoIP Inc (Dec 2018-Sept 2019)

• Helped port product from FreeBSD 8 to FreeBSD 12.
• Diagnosed and solved performance problems using dtrace, PMCs, flamegraphs.
• Refactored kernel netgraph module changes for maintainability.

SpeedGauge (June 2014-Dec 2018)

• Implemented multiplexing messaging library in Python
  • Supporing SQS (production) and files (for regression testing)
  • Added optional JSON encoding
• Ported processing "pipeline" componennts from Perl to Python.
• Technology assessment (Cassandra, DynamoDB, Redshift, Spark).
• Implemented new NoSQL datastore services using DynamoDB and redis.
• Created client database caching layer (lightweight ORM) in Python, using Redis, Memcached and/or Elasticache.
• Converted AWS instance configuration from Chef to Ansible.
• Implemented auto-scaling of EC2 instances.
• Maintained and enhanced Graphite & Logging infrastructure.
  • Created filtering syslog to slack bridge
  • Created Ansible configuration scripts for monitoring and logging instances.
  • Created montoring screens using graphite.
• ETL of 10+ years of historical data using PySpark on EMR.
• Added OpenID Connect authentication to Flask based API service for use by Android App.

Avigilon -- Linux Platform Contractor (Apr 2015 - Jan 2017)

• Embedded Linux based Video Security Appliance development.
  • Disk management
  • Firmware signing and encryption (using OpenSSL C API)
• Wrote Python regression test framework for Video Analytics Library

Second Wind (Jun 2006-Mar Apr 2015)

Code runs on Linux Server, Embedded Linux (Sodar wind prospecting appliance),

Alcatel-Lucent Enterprise (2004-2014)

• Implemented IPv6, Websockets and edge-triggered epoll in 30K SSL connection mutiplexer.
• Developed Java middleware to send XML encoded configurations to central Configuration Management Service using Java Persistence API.
• Modified upgrade procedures to perform upgrade on mirrored copy of system with minimal system downtime.
• Ported product from RH9 to RHEL4.
• Implemented SNMP monitoring.
• Developed VNC based "Desktop MCU" for multi-viewer application/desktop sharing with SIP signalling, Java & ActiveX viewers.