John M Bresnahan

815-­519-­2893

john@bresnahan.me

Experienced software engineer with a proven track record of delivering high quality

architecture and production software focused on developing the next generation of

cloud computing.

SKILLS

•

Highly experienced in distributed systems, cloud computing, and grid computing.

• A deep understanding of creating quality software and modern programming patterns.

• Experience with the full software lifecycle. Development, release, support, upgrade,

deprecation.

• Python, Java, C, bash

• GO, C#, C++, Visual Basic, JavaScript, SQL, REST

• AWS, OpenStack, GCE, CloudStack, Digital Ocean, Joyent, Azure

• Google App Engine, Django, Hazelcast, Zookeeper

• Docker, GitHub, Jenkins, Distributed Systems

EXPERIENCE

Dell -­ Principal Engineer

I joined Dell in 2013 and began working on the Dell Cloud Manager (DCM).

10/2013 -­ Present

In this role

I architected and implemented an agent subsystem which allowed DCM to control

globally distributed heterogeneous cloud resources. I led a team of developers in

building and maintaining multi-­platform agents and created an automated build, test,

and release system based on Jenkins and GitHub.

• Lead a team of developers to implement a Linux agent in python and a Windows agent in

C#.

• Designed and created a distributed highly scalable system for controlling virtual machines

within infrastructure clouds as well as a Docker containers.

• Designed and implemented a cross platform reliable messaging protocol created to sustain

network partitions and other unreliable cloud conditions without message loss.

•

Created an abstraction layer that took the power provided by several compute clouds

(AWS, Google Compute Engine, Joyent, Azure, DigitalOcean, OpenStack, and CloudStack)

and normalized them to enable customers to create lock-­in-­free applications.

• Managed the development cycle and release process of open source software product.

Interacted with a quality assurance team and provided high quality production software.

•

•

Interacted with a product team and quickly responded to customers needs in terms of bug

fixes and feature enhancements.

Created and published customer facing documentation: http://dcm-­unix-agent.readthedocs.org/

Red

Hat -­ Senior Software Developer

12/2012 – 10/2013

At Red Hat I was a core upstream OpenStack developer. As a result of my significant

contributions to Nova and Glance as well as my interactions with the OpenStack

community, I was awarded the role of Glance core developer. Additionally I was an

original team member of the Red Hat OpenStack offering RDO.

• Core member of Glance

• Reviewed hundreds of patches for inclusion into the code base.

•

Created, reviewed, and implemented blueprints for the Grizzly and Hanava releases.

• Designed and implemented key features relating to efficient image propagation.

•

•

•

Created and maintained OpenStack RPMs for RHEL, Fedora, and RDO releases.

Integrated GlusterFS with OpenStack Nova and Glance by adding an image propagation

plugin architecture to Nova.

Implemented an image transfer service and proposed it for inclusion into OpenStack.

The Nimbus Project -­ Senior Software Developer

3/2010 – 11/2012

The Nimbus Project predates EC2 and pioneered research into viable cloud computing

techniques that are now common place. On this small team I worked in many facets,

including R&D, operating IaaS clouds, user support, outreach and presentation, and

software design and implementation. We created a platform-­level cloud scaling

system that managed the life cycle of VMs running in IaaS clouds and auto-­scaled

them in response to application load.

• Designed, and implemented cloudinit.d, a sophisticated multi-­cloud application management

tool. This tool predates Ansible yet shares similar concepts.

• Designed and implemented Cumulus, a storage cloud which implements the S3 REST

interface.

• Designed and implemented LANTorrent, a unique data transport protocol used to propagate

many large VM images across networks.

•

Created a test framework consisting of over one-­thousand tests that dramatically reduced

software release overhead.

• Coordinated Cloud software installations and development across several institutions.

•

Presented papers, research findings, and tutorials at several prominent conferences.

Argonne National Lab -­ Lead Developer GridFTP

8/1998 – 3/2010

While working for the Globus Project I was an architect, author, and lead developer of

GridFTP which performed more than six million transfers a day worldwide. I created

production software that allowed scientists to use geographically distributed compute

and data collections resources. I published and presented several papers and gave

tutorials on advanced high speed wide area data transfer.

• Designed and implemented the GridFTP protocol, server, clients, and a robust layer of

efficient C libraries.

• Wrote, reviewed, and/or debugged every line of code and provided successful community

interactions and user support.

• Researched and developed various data transfer techniques which achieved optimal

throughput under heterogeneous conditions and resulted in GridFTP becoming the dominant

data transfer service.

• Published several papers which presented novel techniques such as network overlays,

reliable parallel multicast streams, and parallel processing of security signing.

• Designed and implemented a fast and efficient asynchronous IO socket library which

includes an abstraction layer for both threaded and non-­threaded libraries.

EDUCATION

University of Chicago

MS Computer Science

• Award winning thesis: An Architecture for Dynamic Allocation of Compute Cluster Bandwidth

published at The 8th LCI International Conference

Northern Illinois University

MS Computer Science

BS Computer Science

• English Minor

LINKS

Publications

Source code

LinkedIn

Blog

http://john.bresnahan.me/home/publications

https://github.com/buzztroll

https://www.linkedin.com/profile/view?id=35954356

https://tropicaldevel.wordpress.com/

1992 -­ 1998

2003 -­ 2006