Mark Josef

github mark

Representative Ruby work:
- Code katas - see branch "mark_solutions"
- shard gem - gem for running code shared via gists.
- easyrb gem - gem for convenient ERB templates outside of Rails projects.
- string_formatter gem - gem for custom sprintf-style format strings methods.
- mark's monkeypatches - library of well-tested helper methods.
- Proof Machine - library for propositional logic using ruby.
- split_block - exploring using Fibers to do something otherwise impossible.

Education

M.A. Mathematics, University at Buffalo SUNY
B.S. Computer Science, Mathematics, University at Buffalo SUNY
B.A. Linguistics, Philosophy, University at Buffalo SUNY

Background

I'm a software developer living in Buffalo, NY. I have been developing Rails applications since 2005, and more recently have branched out into mobile development using RubyMotion, and HTML 5 development using cocos2d-js. I focus heavily on software architecture, trying to determine the right way to develop an application or feature.

Technical Skills

Languages Ruby, Javascript, Java, Actionscript, Objective-C, SQL, Coffeescript

Technologies Postgres, Mysql, Haml, Sass, git, svn, cocos2d

Experiences

Geezeo, Inc. / Jack Henry & Associates

Software Engineer, Senior Advisory :: 2/2016 - Present

Designed a suite of services to handle multi-GB file ETL using Amazon Lambda
Worked with mutliple banks as a technical liaison to resolve integration issues
Refactored difficult parts of a Rails codebase to ensure clear, understandable behavior
Implemented SSO for a new partner spec
Architected several microservices
Implemented multiple microservices in Scala, Javascript, and Typescript

Division by Zero, LLC

Partner :: 3/2006 – 2/2016

Developed an intranet application for medically qualifying firefighters
Developed an intranet application for managing a staffing agency.
Developed software for recording & printing home inspection examinations.
Created subsystem for scheduling office staff and on-site medical exams.
Created subsystem for calculating payroll for company employees.
Created subsystem for entering feedback reviews and calculating ratings based on various criteria.
Created subsystem for scheduling employee interviews and meetings.
Created a Flash tool for creating music album covers.
Created an advanced Flash framework for database-driven puzzle games.
Created an Angular interface for managing money distribution towards goals, for Geezeo
Implemented a Rights/Roles system for standardizing user authorization

Liaison International / Academic Software Plus

Platform Architect :: 10/2008 – 11/2013

Designed and developed an application for PT students & instructors to answer a questionnaire.
Was involved in project design and architecture decisions for software used by thousands of people.
Added an identity system for flagship product to handle complicated user needs.
Revamped and rewrote permissions system for flagship product to make checks clearer and faster.
Discussed and designed software architecture for junior programmers to implement.
Designed and developed an ETL to manage student data with a major focus on speed and efficiency.
Improved student ETL speed from ~30 seconds to ~0.2 seconds.

Surplus Stock Enterprises, Inc.

System Architect / Lead Developer :: 5/2006 – 9/2008

Designed and built a large e-commerce web application for selling industrial surplus.
Created advanced metadata system for classifying and describing all industrial surplus.
Developed search engine that allows complex searching, filtering and sorting based on item metadata.
Created tools for allowing any user to list or purchase surplus inventory.
Created subsystem for allowing clients to use the site for internal inventory management.
Created subsystem for sales staff to manage their sales leads, and monitor purchases.
Developed tools for keeping track of finances, sales, and generating invoices.
Created subsystem for generating customer-branded web fronts.

Medical Records Online, Inc.

Software Developer :: 12/2004 – 5/2006

Developed a web application for tracking users' medical records, and providing emergency access to medical personnel.
Created tools for utilizing the ICD-10 medical classification system.

mark / resume