👋 Hi, I'm

Jonathan
Fainsilber

Software engineering leader. I build teams, and the cloud-native systems they ship.

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About

I've spent 18+ years in software — from full-stack engineer to leading teams of up to 20. I specialise in .NET, React, Azure/GCP and microservices, and in the unglamorous but high-leverage work of turning legacy monoliths into modern, cloud-native platforms: at NCR Voyix that meant a backend now live in 700+ stores worldwide.

Today I lead the Certifications team at Pathlock, on an enterprise identity-governance platform, where I'm also championing AI-assisted development with GitHub Copilot and Atlassian Rovo. I care about clean architecture, performance, and helping engineers grow.

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Recent experience

  1. Software Development Team Lead

    Pathlock, Israel

    Dec 2025 – Present

  2. Software Development Team Lead

    NCR Voyix, Israel

    Apr 2021 – Nov 2025

  3. Senior Software Engineer (Full Stack)

    Mobileye, Israel

    Nov 2017 – Mar 2021

Full CV
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Selected projects

Hebrew Calendar

A Garmin watch face that shows the Hebrew date and holiday (with the Omer count) next to the time, steps and next sunrise or sunset. An optional Shabbat mode times Shabbat and holidays from your local sunset and switches to a simpler “Shabbat Shalom” / “Chag Sameach” display. All calculations run on the watch. It is on the Connect IQ Store for 100+ Garmin models, with 1,000+ downloads and a 4.4-star rating.

  • Monkey C
  • Garmin Connect IQ
  • Wearables
View on GitHub

FAIN Coach

A local-first AI running coach. Upload .tcx files from any GPS watch, add how the run felt, and get structured coaching and multi-week training plans from open-weights models via OpenRouter (bring your own API key). Files are parsed in the browser, and only compact run summaries — never raw GPS traces — are sent to the model.

  • TypeScript
  • React
  • PWA
  • Cloudflare Workers
  • LLM
View on GitHub
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Let's talk

The best way to reach me is by email — I read everything.