Dan Krol Email & Phone Number

Boston, MA, US

Developed applications for Sandstorm, an open source platform for self-hosted web applications, both as a volunteer and as a contractor.* New Map Application: Created a new fully self-hosted OpenStreetMap application: https://github.com/orblivion/sandstorm-share-a-map* Kiwix Package: Created a package for Kiwix, an existing application for hosting mirrors.

Manchester, New Hampshire, US

Contributed to and lead various projects related to blockchain and distributed systems, including:* Wallet Sync Server: Designed and implemented non-custodial cryptocurrency wallet sync for LBRY. Syncing encrypted wallet between client and server with a single password, securely, without losing data.* ActivityPub Integration: Researched and worked on.

ElectionBettingOdds.com is an aggregator of betting odds on the outcomes of key events, usually elections, from various betting websites. I made various improvements to the site, including:* Electability Feature: Implemented the "Electability" feature, factoring in odds for primary and general election victory.* Data Sources: Greatly improved the.

Contributed to Etherpad, a prominent open-source web-based word processor, implemented in JavaScript. Projects included:* WebRTC Plugin: Fixed error messages and ensured cross-browser compatibility, enhancing user A/V chat experience within collaborative documents.* Color Picker: Corrected user's avatar color in shared documents, implemented validation.

San Francisco, CA, US

I was part of the API team at Mix.com, an application that recommends content based on user curation. The components I worked on were written in Go and Node.js.The major part of my job was coordinating with the Recommendation Service team on taxonomy of topics, architectural decisions, and turning user events into feedback for future recommendations.

Santa Clara, California, US

I was part of a small team that managed the API for an athletic watch at Basis, part of Intel's now defunct wearables division.The most interesting project I was involved in was smoothly transitioning each user to an updated sleep data stream. This was complicated by users having firmware versions, time zones, and other factors. In the end we mostly.

San Francisco, CA, US

Among the first few Python/Django engineers at Brilliant.org.* Helped design backend and database schema for the initial STEM problem solving interface.* Created UI framework on top of Django that facilitated in-page component updates via ajax, but degraded seamlessly to no-JavaScript for old browsers.* Integrated analytics and A/B testing, connecting user.

Backend Python/Django developer for Alltuition, which offered streamlined student loan services.* Improved loan consolidation rate prediction system.* Conducted Mechanical Turk based research project.* Created Python Client Library for 3rd party API.

PHP/SQL development. Feature/bug fixes for site, store and shipping systems.

Austin, Texas, US

Fixed bugs in spreadsheet file parsers written in C as part of a division of Oracle (originally Stellent) that developed a universal file viewer and converter application called Outside-In.* Figured out undocumented quirks of file formats.* Matched behavior of native spreadsheet applications.* Debugged crashes.

I was originally hired to develop an in-house application that allowed workers on the factory floor to enter removal times for items placed in a number of industrial ovens. The program would then display the times, and give an alert when something needed to be removed.Once this was completed, I handled the purchasing and setup of a security camera system.

Courbevoie, Ile De France, FR

* Hardware quality testing for BioLogon project* Updated technical documentation for IBIS project testing procedure* Bug testing for firmware and software interfaces

Implemented and maintained company website. Written in HTML/JavaScript using Adobe GoLive.