Eran Cahana

I designed and developed the system (delegating some testing and isolated small development tasks), with client-server architecture—comprised of a back-end server (.NET), desktop apps (WPF), a web UI (C# / Razor), and a web API (Scala)—each communicating through a message broker (RabbitMQ).

The complete solution streamlined the processing of receiving inventory, its classification, cataloging, product processing, photography, image post-processing, inventory management, and reporting of sales, inventory, and workforce productivity.

To minimize human error and maximize efficiency at each juncture, human operators were given limited options, as the system had already preseeded data for most products based on previously scheduled scraping, and cross-referenced shared data between products.

I supported several marketplaces, including eBay auctions and fixed price, Amazon, and WordPress's WooCommerce. Prices were adaptive, with listing prices updating over time depending on several factors such as availability, days on market, and more.

Since the system was geared towards one-of-a-kind products with shallow inventory, actions on one marketplace (such as a purchase) required immediate action on others (such as de-listing).

A revolutionary mobile data syncing platform at the time, we developed a platform around the world that instantly synced and shared data such as meetings, contacts, multimedia, files, and more, between your different mobile devices and the web. Cell telecoms around the world implemented the system but have since been superseded by suites from Google and Apple.

I was the first back-end developer hired by the startup founders. I started with porting the initial prototype into a production telco-grade system, while also integrating with the then-popular SyncML protocol. Afterward, I was the leading developer on the primary sync features (those being contacts and events across timezones) and also tasked with data layer optimizations and precision query tunings.

My many varied roles had me traveling to client facilities to perform onsite system integrations and live problem solving and also turned me into the main point of contact for collaboration between our team and web GUI and DBA teams.

I led parts of development, such as security hardening and enterprise features, including permission-based enterprise groups. I was also chosen to head the development of new tech prototyping and new platform integrations.

I developed an internal survey web system for a multinational Fortune 500 company to replace the legacy system in place with enhancements and a newer tech stack (ASP.NET MVC). The system served the legal department to survey tens of thousands of employees annually, classify their responses, follow-up by legal representatives, view statistics, and run various reports.

Requiring frequent changes to survey layout, verbiage, and content, nearly all elements were developed to be customizable by the admin back end, including a customized editor for composing email templates.

A robust emailing component generated and sent hundreds of thousands of annual templated emails to employees, such as auto-reminders and confirmations, based on their respective states or actions.

Reports could be dynamically user-built in addition to those predefined, and could be run and viewed on the web, or downloaded in PDF or Excel format.

Because the format of the source data files received was often changing, I added flexible mapping methods to easily be able to import data files from the backend admin.

I created another similar system for viewing and reporting historical surveys and where survey data was archived once wholly addressed.