Joshua Zeltser
Senior Cloud Engineer - Backend at Salt Security
Center District, Israel
Summary
👤
Senior🎓
Top SchoolJoshua Zeltser is a Senior Cloud Engineer with a decade of software experience and over six years focused on building scalable backend and full-stack systems. He designs and implements microservices and secure cloud-native architectures using Go, Java, Node.js, and Python, and automates deployments with Terraform, Kubernetes (EKS) and CI/CD pipelines. Joshua has driven migrations from monoliths to microservices and modernized deployments with serverless and AWS services while integrating security tooling like SecurityHub, GuardDuty and Snyk. He mentors teams, runs production pipelines, and has led productization efforts—turning watermarking tech into a multi-tenant SaaS and improving DRM performance by rewriting Java components in Go. An active contributor to the Jupyter Notebook project, he’s improved accessibility and internationalization, reflecting a consistent focus on usability as well as performance. Based in Israel, he blends hands-on engineering with customer-facing production ownership and a background in formal software systems engineering from UCL.
10 years of coding experience
6 years of employment as a software developer
Bachelor's degree Computer Science, Bachelor's degree Computer Science at Imperial College LondonUniversity College London
English, Hebrew
Stackoverflow
528reputation
56kreached
36answers
2questions
Github Skills (15)
html10
accessibility10
css10
jupyter-notebook10
javascript10
ui-design9
translation9
lessc9
git7
merge6
version-control6
github6
conflict6
gitignore6
command-line6
Programming languages (5)
Github contributions (5)
jupyter/notebook
Jun 2019 - Jun 2020
Jupyter Interactive Notebook
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:33 commits, 24 PRs, 28 comments in 1 year
Contributions summary:Joshua made several contributions focused on improving the user interface and accessibility of the Jupyter Notebook interface. They addressed accessibility issues by adding ARIA labels and improving the focus order. Additionally, they fixed bugs, merged changes, and added translation tags to improve the overall user experience and internationalization of the application. Furthermore, they contributed to code modifications.
jupyter-notebooknotebookjupyterlabnotebooksjupyter
uclixnjupyternbaccessibility/notebook
Jun 2019 - Jul 2019
Jupyter Interactive Notebook
Contributions:88 commits, 39 PRs, 158 pushes in 27 days
jupyter-notebooknotebookjupyterlabjupyterbinder
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