John Leimgruber
Philadelphia, Pennsylvania, United States
Summary
🤩
Rockstar🎓
Top SchoolJohn Leimgruber is a seasoned systems and data engineer with 13 years of experience building reliable, cost-conscious infrastructure and data pipelines across embedded robotics, cloud hosting, and media SaaS. He combines low-level systems expertise—kernel compilation, eBPF performance tuning, and NUMA/cgroups analysis—with high-level data engineering and async Python services to expose predictable, typed APIs for complex legacy schemas. At Linode he sped provisioning and performance work that contributed to a major acquisition, and at Futurestay he both rescued legacy systems and cut cloud spend by $10k+/month while mentoring junior engineers. His background in robotics and embedded real-time systems informs pragmatic, performance-first designs, and he’s contributed ML-focused work to notable open-source projects like a char-RNN TensorFlow repo. Based in Philadelphia, he balances production engineering with creative side projects—from game mods to a published book—demonstrating a blend of technical depth and curious, hands-on inventiveness.
12 years of coding experience
17 years of employment as a software developer
MSECE Electrical and Computer Engineering, MSECE Electrical and Computer Engineering at Purdue University
Stackoverflow
26reputation
843reached
1answer
0questions
Github Skills (9)
rnn-model10
tensorflow10
n10
python10
machine-learning9
lstm9
dropout8
horizon6
rethinkdb6
Programming languages (16)
Github contributions (5)
sherjilozair/char-rnn-tensorflow
Mar 2017 - Apr 2017
Multi-layer Recurrent Neural Networks (LSTM, RNN) for character-level language models in Python using Tensorflow
Role in this project:
ML Engineer
ML EngineerContributions:23 commits, 18 PRs, 10 pushes in 1 month
Contributions summary:John contributed to the character-level language model by merging various branches, including patches and updates. Their work includes adding new functionality, such as a NASCell, updating MultiRNNCell, and integrating tensorboard for improved monitoring. They also addressed printing errors by encoding results and updated the sampling process.
pythonmulti-layertensorflowrnnlstm-neural-networks
ubergarm/l2tp-ipsec-vpn-client
Aug 2016 - Jan 2019
A tiny Alpine based docker image to quickly setup an L2TP over IPsec VPN client w/ PSK.
Contributions:8 commits, 10 pushes, 1 branch in 2 years 5 months
vpn-clientdocker-imagetinyvpndocker
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