Michał is available for hire
Hire MichałMichał Papis
Verified Expert in Engineering
Unix Shell Scripting Developer
Location
Berlin, Germany
Toptal Member Since
January 18, 2021
Michał has many years of experience in a variety of languages, but he has solely focused on Ruby since 2010. Ever since then, he's been polishing his Ruby on Rails skills at companies both large and small, working on open-source projects, and teaching others. He enjoys collaborating and sharing his knowledge to solve complex problems.
Portfolio
Packet
SQL, Ruby Performance, Software Architecture, Test-driven Development (TDD)...
Toptal
SQL, Ruby Performance, Leadership, Software Architecture...
Consileon Polska
SQL, Ruby Performance, Software Architecture, Test-driven Development (TDD)...
Experience
Availability
Part-time
Preferred Environment
Software Architecture, Test-driven Development (TDD), PostgreSQL, Back-end, Automation, *nux Shells, Ruby on Rails (RoR), Git, SUSE, Linux, RubyMine
The most amazing...
...feature in RVM I've developed is autolibs feature. It replaced manual instructions with an automated system, installing necessary components for Ruby.
Work Experience
Senior Ruby Developer
2019 - 2020
Packet
- Delivered greenfield application in a tight schedule. It had a minimalistic UI to enter data. In background jobs, it synchronized API data to match with existing data. Multiple reports grouped the data on multiple criteria, including forecasting.
- Maintained and extended existing Billing Rails API. My work included porting the previous app to the API and planning and implementing new features around it.
- Convinced the team to use easier solutions despite hard pushback. This reduced the required work by half and limited possible errors with a cache for communication.
Technologies: SQL, Ruby Performance, Software Architecture, Test-driven Development (TDD), RSpec, REST APIs, PostgreSQL, Back-end, JavaScript, APIs, Employee Training, Public Speaking, Shell, Ruby Gems, Automation, RubyMine, Database Design, Object-oriented Design (OOD), Git, Billing, Ruby on Rails (RoR), Ruby
Senior Ruby Developer
2016 - 2019
Toptal
- Managed a team of eight people with a 13-hour difference in time-zones; developed an asynchronous process for the team to allow fully asynchronous work.
- Completed over 70 technical interviews, checked architectural skills, and solved complex problems.
- Wrote a library to monitor blocked Java processes—this helped our DevOps team solve problems with Jenkins running over 100 concurrent builds.
- Trained a junior developer to a mid-level, fully functional team member within a senior-only company in just a few months.
- Promoted the use and development of open-source tools, encouraged other developers to make a presence, developed multiple open-source tools that gained quick traction in the community, and gave multiple talks at conferences about the tools.
Technologies: SQL, Ruby Performance, Leadership, Software Architecture, Test-driven Development (TDD), RSpec, GraphQL, REST APIs, PostgreSQL, Back-end, JavaScript, APIs, Employee Training, Conference Speaking, Public Speaking, Ruby Gems, *nux Shells, SUSE, Linux, RubyMine, Unix Shell Scripting, Database Design, Object-oriented Design (OOD), Git, Automation, Java, Shell, Ruby on Rails (RoR), Ruby
Senior Ruby Developer
2016 - 2016
Consileon Polska
- Wrote Ruby integrations for third-party APIs, including over five integration APIs for different financial systems.
- Supported the team with Ruby on Rails development.
- Implemented some small features with Ruby on Rails.
Technologies: SQL, Ruby Performance, Software Architecture, Test-driven Development (TDD), RSpec, REST APIs, PostgreSQL, Back-end, Object-oriented Design (OOD), JavaScript, Billing, Employee Training, Conference Speaking, Public Speaking, Shell, Ruby Gems, Git, SUSE, Linux, RubyMine, Database Design, APIs, Ruby on Rails (RoR), Ruby
Senior Ruby Developer
2015 - 2016
Stack Builders
- Co-managed a team of 10+ people, planning features and Ruby and Rails development.
- Built long-term architecture plans for the project.
- Paired with developers to help them improve coding skills (also JavaScript).
- Collaborated with and helped sysadmins automate tasks.
Technologies: SQL, Ruby Performance, Leadership, Software Architecture, Test-driven Development (TDD), RSpec, REST APIs, PostgreSQL, Back-end, Object-oriented Design (OOD), APIs, Billing, Employee Training, Conference Speaking, Public Speaking, Shell, Ruby Gems, Git, SUSE, Linux, Unix Shell Scripting, Database Design, Automation, JavaScript, Ruby on Rails (RoR), Ruby
RVM Release Manager
2011 - 2013
Engine Yard
- Served as a RVM (Ruby version manager) and handled releasing new versions, maintenance, and implementing new features.
- Integrated with internal services. Helped plan and implement the integration of RVM with internal Ruby services.
- Solved issues and implemented automation solutions to prevent problems from happening. Discussed user problems in tickets and on StackOverflow.
Technologies: Ruby Performance, Leadership, Software Architecture, Test-driven Development (TDD), RSpec, Back-end, Object-oriented Design (OOD), JavaScript, APIs, Employee Training, Conference Speaking, Public Speaking, Java, *nux Shells, Git, SUSE, Linux, C++, Unix Shell Scripting, Ruby Gems, Ruby on Rails (RoR), Shell, Ruby, Automation
IT Consultant/Team Coordinator
2007 - 2011
Consileon Polska
- Supported our customers, providing them with the highest level of knowledge from all over the IT range.
- Developed and maintained the deployment process, which included installing dependencies and setting up servers and databases.
- Managed coordination and communication between our customers and our team of Rails developers.
Technologies: SQL, Ruby Performance, Leadership, Software Architecture, Test-driven Development (TDD), RSpec, REST APIs, PostgreSQL, Back-end, JavaScript, Employee Training, Shell, Ruby Gems, *nux Shells, Git, Linux, C++, Unix Shell Scripting, Database Design, Object-oriented Design (OOD), Java, APIs, Ruby on Rails (RoR), Ruby, Automation
Experience
Ruby Version Manager
http://rvm.ioRVM helps developers to install Rubies, switch between different versions of Rubies and sets of Gems. I improved the tool, adding automation whenever it was suitable. Adding autolibs or RubyGems-bundler solved many problems and reduced the number of support tickets. Multiple times, I investigated issues on the verge of Shell, compilation, Ruby, Gems, Bundler, and Rails.
Gem RubyGems-Bundler
https://github.com/rvm/rubygems-bundlerA Gem to help developers avoid typing `bundle exec` before each Ruby command. It hooks into both RubyGems and bundler. It helped to reduce number of issues opened for RVM by 10-fold. The project has over 106 million downloads.
Gem Executable-Hooks
https://github.com/rvm/executable-hooksRuby Gem to add support for executing plugins on running ruby executables. It required hooking into RubyGems and extending it in a compatible way with other plugins, and generating executables. The project has over 36 million downloads.
Gem Pluginator
https://github.com/rvm/pluginatorThe gem allows an automatic and configurable way of loading plugins into ruby applications. The gem comes with an extendable interface through its own plugin interface. This gem has almost 1 million downloads.
Skills
Languages
Ruby, SQL, C++, Java, JavaScript, GraphQL
Frameworks
Ruby on Rails (RoR)
Tools
RSpec, RubyMine, Git, *nux Shells, Shell, Bundler
Paradigms
Automation, Database Design, Object-oriented Design (OOD), Test-driven Development (TDD)
Other
Ruby Gems, Back-end, Unix Shell Scripting, Public Speaking, Conference Speaking, Employee Training, APIs, Software Architecture, Leadership, Ruby Performance, Billing
Libraries/APIs
REST APIs
Platforms
Linux
Storage
SUSE, PostgreSQL
Education
1999 - 2003
Engineer's Degree in Computer Engineering
Technical University of Szczecin - Szczecin, Poland
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