James Defelice - Platform Engineer

James Defelice

Platform Engineer

City of Rochester, New York, United States

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Summary

🤩

Rockstar

🎓

Top School

James Defelice is a Platform Engineer with 11 years of experience building and automating distributed systems, currently responsible for provisioning and maintaining production infrastructure at Citadel. He spent significant time at Mesosphere contributing as a staff engineer and distributed applications developer, where he worked on core Mesos ecosystem projects like Marathon and mesos-dns to improve container networking, service discovery, and operational automation. An active open-source contributor, he implemented CRAM-MD5 authentication and refactored connection and locking logic in mesos-go and mesos-dns, showing a strong knack for low-level protocol work and concurrency robustness. With a BS in Software Engineering and an MS in Bioinformatics from RIT, he combines systems engineering rigor with a data-minded perspective that surfaces in reliability-focused designs. Based in Rochester, NY, he blends deep backend and DevOps experience to deliver resilient platform services that scale.

11 years of coding experience

17 years of employment as a software developer

BS, Software Engineering, BS, Software Engineering at Rochester Institute of Technology

Byron-Bergen High School

Github Skills (27)

mesos10

back-end-development10

apidoc10

configuration-management10

authentication10

zookeeper10

java10

javas10

go10

service-discovery10

api10

dns10

ansible10

ansible-galaxy10

protocols10

Programming languages (18)

JavaC++RustMakefileScalaGoMustacheHTML

Github contributions (5)

mesos/mesos-go

Dec 2014 - Mar 2018

Go language bindings for Apache Mesos

Role in this project:

Back-end Developer

Contributions:181 commits, 226 PRs, 496 pushes in 3 years 3 months

Contributions summary:James contributed to the `mesos-go` repository by implementing and fleshing out support for the CRAM-MD5 authentication mechanism. Their work involved creating the necessary code for the authentication process, including handling authentication steps, mechanisms, and success/failure scenarios. They also addressed build issues and refactored the codebase for better handling of authentication, adding features such as connection state management and a mechanism abstraction.

go-languagemesos

d2iq-archive/mesos-dns

Mar 2015 - May 2017

DNS-based service discovery for Mesos.

Role in this project:

DevOps Engineer & Backend Developer

Contributions:1 release, 80 commits, 80 PRs in 2 years 2 months

Contributions summary:James contributed significantly to the infrastructure and backend aspects of the mesos-dns project. Their work included implementing Ansible scripts for supporting Mesos-DNS on GCE and Mesosphere nodes. They also focused on cleaning up the ZKdetect interface, addressing concurrency issues, and refactoring locking mechanisms within the records component. Further contributions involved fixing bugs and improving the overall system stability, demonstrating a strong understanding of DNS-based service discovery in a Mesos environment.

dnsmesosservice-discoverydcos-networking-guilddcos

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