Daniel Gryniewicz
Software Engineering Manager at IBM
Ann Arbor, Michigan, United States
Summary
🤩
Rockstar🎓
Top SchoolDaniel Gryniewicz is a seasoned software engineering manager with 21 years of experience specializing in embedded and systems network programming, particularly IGP routing protocols (OSPFv2/v3 and ISIS) and routing/switching core components. He has led and scaled storage and networking teams at Red Hat and IBM, contributing hands-on to projects such as Ceph—fixing memory leaks and hardening RGW admin tools—and has deep Linux distro experience from his time maintaining Gentoo GNOME and virtualization packages. Comfortable shifting between low-level C/C++ systems work and managerial responsibilities, he combines operational rigor with a developer’s attention to stability and performance. Based in Ann Arbor, he brings a pragmatic, cross-disciplinary perspective shaped by roles from startup QA to enterprise storage architecture.
21 years of coding experience
23 years of employment as a software developer
University of Michigan
Github Skills (9)
memory-management10
storage10
object-storage10
c-language10
cprogramming-language10
back-end-development10
aws-s39
json9
xml8
Programming languages (10)
Github contributions (5)
ceph/ceph
Sep 2015 - Jan 2023
Ceph is a distributed object, block, and file storage platform
Role in this project:
Back-end Developer
Back-end DeveloperContributions:798 reviews, 289 commits, 243 PRs in 7 years 5 months
Contributions summary:Daniel made several contributions to the Ceph storage platform, primarily focusing on fixing memory leaks and improving the functionality of the RGW (RADOS Gateway) administration tools. They addressed issues within the RGW admin by cleaning up memory leaks and improving overall stability. The user's work involved modifying code related to object storage and bucket configuration, as demonstrated by changes in files such as `rgw_admin.cc` and related files.
fusefile-storagecephstorageopenebs
dang/ntirpc
Sep 2015 - Aug 2024
New development on tirpc
Contributions:57 pushes, 101 branches, 6 tags in 9 years 1 month
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