I do iOS app development using Objective-C, Swift. Web app development using Ruby on Rails, Node.js, PostgreSQL, MongoDB, React Native.

Over 17 years’ experience in software development, 5 years as a full stack web developer and 4 as an iOS Software Engineer.
Languages: Objective-C (expert), Swift (competent), Ruby (proficient), C++ (proficient), JavaScript (competent), Python (competent)

EXPERIENCE
Groser, Moscow, Russia July 2014 - present
Founder/Senior Software Developer
Created, launched and grown to 150 orders/month as a same day grocery delivery service. The service consists of client and courier iOS apps, shared Rails back end, and
Designed and developed e-commerce iOS app to browse and order grocery delivery. Was twice featured on front page of App Store Russia as high as #3 in Best New Apps.
Designed and developed courier iOS app to assist grocery picking in supermarket
Utilized geo-fences and significant position change notifications to check-in/checkout courier into/out of supermarket and estimate time of order delivery for a client. Found balance between accuracy and energy use
Developed Rails 4 back end and order dispatcher
Developed heuristics engine to dispatch orders based on size, weight, distances between courier, store and delivery address, which shortened average delivery time from 3 hours to 2.5 hours
Created web scraper to sync prices with supermarket’s online catalog. 600 items’ prices became synchronized with store without the need to update manually

Instacab, Voronezh, Russia March 2013 - July 2014
Founder/Senior Software Developer
Created and launched on-demand private driver service. Became fascinated with Uber and decided to create the same service on a smaller scale. The service consisted of two iOS apps for clients and for drivers, Rails back end and Node.js dispatcher
Designed and built iOS applications for riders and drivers.

Built custom protocol over WebSockets to connect to Dispatcher. WebSockets allowed almost instantaneous ride requests, without the need for polling.
Prevented the issue of driver app overheating iPhone when used in the field, due to excessive network usage, always on screen and unnecessary GPS accuracy
Designed and developed driver dispatcher in Node.js. Built trip price and time estimation using Google Distance Matrix API
Developed Rails app for riders and drivers. Both rider and driver had access to a dashboard that compiled recent trips and earnings
Built admin panel to analyze geospatial data of driver routes, rider signups and demand on a map with Leaflet.js, Backbone.js and Handlebars.js
Developed responsive Backbone.js single-page app. Built browser based Android app to use single-page mobile web app

Silicom Internet S.L., Voronezh, Russia April 2007 - March 2013
Remote Senior Software Developer
Built English listening exercises website. By watching YouTube videos you had to insert missing words, earn points and compete with other players. Site became popular in Spain and is still being used today.
Built custom Forex trading platform based on open source engine. Service allowed you to subscribe to the traders that you find dependable, and trust a system to match traders’ actions buying and selling orders on your behalf.

JSC Concern Sozvezdie, Voronezh, Russia June 2002 - April 2007
Software Developer
Developed networking code and menu system for Windows CE using C++, to command, control, and query units in a tank battalion. Implemented SIP protocol for VoIP using C++
Implemented reliable file transfers and Internet browsing in C++, over long range one-way radio station. Achieved transfer speed up to 100 Kb/sec