Résumé

PDF Version (Abridged)


Work Experience

Co-Founder & Partner 2020 - Present
Foxhound Systems

Foxhound Systems creates software systems that inspire confidence and enable organizations to do their best work. We specialize in using the Haskell and Elm programming languages coupled with a variety of techniques such as SQL query optimization and database tuning to achieve superior reliability, performance, and security.

Chief Technology Officer 2014 - 2020
Roompact

  • Set long term road map for product development; continually raised standards for application design, architecture, documentation, performance, security
  • Led hiring process for technical employees and interns; developed and led training of new technical staff
  • Chief architect of new features, functionality, and underlying infrastructure; led team members in making design decisions ranging from database schemas, to user interfaces, to application-specific RESTful APIs
  • Introduced the Haskell and Elm programming languages as the foundation for new development; taught Haskell, Elm, and functional programming concepts to technical team members with no previous FP experience
  • Planned and executed the transition of company server infrastructure to Amazon Web Services; reduced technical infrastructure costs by 70%
  • Employed a variety of AWS tools and services, including EC2, RDS, S3, ELBs, SES, Route 53, Lambda, CloudWatch, CloudFront, IAM, Inspector, etc.
  • Achieved completely automated and reproducible Linux server deployments and configuration management with Bash and Ansible
  • Utilized and educated team members on the use of a variety of programming languages, infrastructure tools, and frameworks: Haskell, Elm, JavaScript, CakePHP, Node.js, Jekyll, HTML, SASS/SCSS, Nginx, MySQL, Redis, Supervisor, Ansible, Nix
  • Established internal code review process to improve overall software quality, encourage exchange of knowledge among technical team members, and increase the bus factor of various system components
  • Educated team members on use of various technical tools, such as Vim, tmux, ssh, remote filesystems, git, Linux CLI tools such as grep, sed, awk, tail, piping, filtering logs, use of code linters, refactoring tools, dotfile configurations, Bash and Python scripting, etc.
  • Facilitated and supported professional development of technical team members; assisted in development of key skills and long term goals; provided guidance in learning specific topics

Product Development Lead 2012 - 2013
Next Generation Gaming, LLC

  • Product management & development position; led and coordinated a team of software developers, QA testers, and customer relations staff to create features and digital products leading to increased player engagement and revenue in an online-RPG environment with over 20,000 players per month
  • Designed and led the implementation of an in-game credit system which automated all product sales, removed sales overhead costs, and allowed for the creation of several new categories of products; increased average monthly revenue of the company by 35%
  • Planned and assigned projects, held development meetings, wrote technical specifications, analyzed player data and trends, determined project costs and time requirements
  • Performed quantitative analysis of product sales, used results to develop marketing and sales strategies, instructed customer relations staff on how to execute sales strategies
  • Surveyed players to gauge response to game updates and gather general feedback
  • Worked extensively with the PAWN language, MySQL, and PHP

EMT-Basic (Volunteer Position) 2012 - 2014
Illini Emergency Medical Services

  • Staffed various types of events as on-site EMT
  • Led teams of other EMS providers (typical team size was 2-4 EMS personnel)
  • Provided pre-hospital basic life support to patients
  • Performed equipment checks and recorded equipment inventory
  • Coordinated with other agencies (Police, Fire, EMS) during large events (marathons, football games, etc.) to ensure coverage

Open Source Software

isbn (Author) - Haskell library for validating and working with ISBNs

Yesod (Contributor) - The most popular Haskell web framework (top 0.1% of all Haskell packages)

Esqueleto (Contributor) - One of the most popular Haskell libraries for interacting with SQL databases (top 0.1% of all Haskell packages)


Technical Skills

Advanced Basic

Haskell Elm Linux JavaScript PHP MySQL Redis SQLite CSS/SCSS HTML PostgreSQL Nix Git AWS Ansible Nginx Python Apache Bash Node.js DNS SPF, DKIM, DMARC Svn LaTeX OCaml Java C C++

Education

Universitiy of Illinois at Urbana-Champaign 2010 - 2014
B.Sc. in Mathematics & Computer Science, Philosophy

College of DuPage 2012
EMT-Basic Certification


Projects

QuickPhrase - GitHub

A browser-based game designed to be played on a phone written in the Elm programming language.

charukiewi.cz (this website) - GitHub

An ongoing project. A blog website (currently built using Hakyll). A test bed for various design ideas and other web related experimentation.

Project Euler Problems - GitHub

A progression through a series of increasingly difficult math problems, solved programmatically, using various techniques and programming languages like Haskell and Python.

Beer Manager - GitHub

A simple RESTful API built with Flask (a Python microframework) designed to serve as the back end for a beer rating website or application.


Spoken Languages

English, Polish