Marcel Jerzyk

Software Engineer

• Architecture & Code Design
• Took important part designing architecture for important internal APIs
• Upgraded, migrated and refreshed legacy projects to the newest possible versions
• Designed and created the cookie-cutter project sample for internal libraries
• Improved the CI/CD pipelines
• Created a common pipeline repository, for reusable workflows
• Created a fully automated CD for our libraries, and functions
• Improved the time-to-finish, cutting it down by over a half (~10,5min to 4,5min)
• Improved the time-to-information, by splitting down the jobs
• Created Dashboards
• Client-facing dashboards presenting key data improving customers value understanding and retention
• Client/internal dashboards for convenient and easy settings display and settings changing
• Monitored the health of the systems
• I was responsible for maintaining the uptime and trouble-free operation of the system
• I solved the needs and requests of the people from Marketing and Sales department
• Preformed day-to-day features and maintenance tasks on applications
• Was actively involved in money-sensitive tasks
• Proposed and made lots of important implementation changes
• I refactored and improved the maintanability of the internal apps

Python Software Developer (CI Specialist)

• Development of Internal Developer Tools (GUI/CLI/Web)
• Created info-aggregating landing dashboard page (Django, RabbitMQ, Celery).
• Live changes about currently logged user, connected devices specs, (...)
• System info (used RAM, processor, diskspace, ...)
• Versions of currently installed libraries
• Informations of the main internal libraries (last update date, amount of mr's, version, ...)
• Board for team notes, schedules and general cross-informations
• and more...
• Created GUI cross-communication program based on RPC that can interact remotely with machines w/o user interruption
• Created GUI Excel-like app for automatical .csv, .json and .xml cross-parsing
• Created CI tool for automatical version incrementation based on proposed improved commit messages rule
• Improved the Quality in the Area of Task Execution
• Proposed improving commit-messages rule which caught on with enthusiasm in the team
• Wrote internal Python guides and tips & tricks
• Wrote a lot (nice looking!) confluence documents
• Cross-Site Pipelines Integrations (CI/CD)
• Improved Gitlab CI Pipelines execution time: 50 -> 10 minutes.
• Cross-integrated Jenkins and Gitlab pipelines
• Integrated Jenkins with Gerrit
• Created & Manages Jenkins jobs for integration tests
• Automatization
• Created script that scrapes internal JIRA data, processes it and then uploads results to Artifactory / Elastic
• Managing the working time (task comissioning) of one employee
• Architecture Design, Refactorization & Quality Improvement in Internal Applications

Full Stack Developer

• Online Shop
• New features development (back/front)
• Website management
• Performance monitoring and optimizing (cache)
• Ensuring Responsiveness & Database Maintenance
• Security Concerns, SEO, Visual Design
• Employment Agency Website
• Developed static, cross-platform and responsive website from scratch using HTML/CSS/JS/PHP

Co-Founder

The Essence of Hardcore is a side project which turned out to be one of the largest music collective (w/ own event hosting and organization) in the underground polish scene - usually bringing together about 1000 people per event. I'm responsible - among others - for the creative side, advertising reach, live performing and bringing/contracting artists from abroad.