Kamil Grzegorczyk
Verified Expert in Engineering
Performance Analysis Developer
Vienna, Austria
Toptal member since June 26, 2018
Kamil is a seasoned web developer with over 19 years of experience who's collaborated with a number of companies and individuals from all over the world. He's worked on a wide range of projects, from small websites to huge projects serving millions of users per day. Kamil has broad, in-depth experience and pays a great deal of attention to quality, as well as being extremely dedicated to every task that he undertakes.
Portfolio
Experience
- CSS - 16 years
- PHP - 15 years
- WordPress - 12 years
- JavaScript - 12 years
- Git - 9 years
- Performance Analysis - 8 years
- Webpack - 4 years
- Node.js - 3 years
Availability
Preferred Environment
PhpStorm, MacOS
The most amazing...
...project I've worked on was a huge media project serving 1.5 million users per day. I worked there full-time for three years.
Work Experience
Lead Developer (Contractor)
Luckie & Company
- Led the development of mid-scale WordPress-based websites.
- Designed and developed the project architecture, deployment, and development strategies.
- Performed very detailed product performance analysis and optimization.
- Handled the Linux server administration.
- Configured and managed various build servers like Jenkins.
- Set the team's code style, development processes, and branching methodologies.
Owner | Lead Developer
LowGravity.pl
- Led multiple simultaneous projects with teams consisting of six to eight people.
- Designed and developed project architecture, deployment, and development strategies (continuous integration, continuous deployment).
- Performed very detailed product performance analysis and optimization.
- Developed in various back-end technologies like PHP or Node.js.
- Built-up the front-end HTML5, CSS3, and JavaScript along with frameworks like jQuery, Backbone.js, Angular, and React.
- Developed or consulted on and provided analysis for small- to high-scale WordPress-based websites.
- Managed projects from marketing, negotiations to wireframing, development, and final product.
- Performed Windows and Linux servers administration.
- Handled company management (finances, planning, organization, accounting, and human resources).
- Configured and managed various build servers like Jenkins.
Senior Full-stack Developer
BDSwiss
- Mentored junior developers and performed code reviews.
- Built a WordPress-based company website connected with a trading application written in Node.js.
- Implemented a performance analysis and defined the long-term strategy and optimizations.
- Designed and executed build and deployment strategies and continuous development and deployment.
- Developed using PHP, JavaScript, and CSS.
- Set up the working environment and technology stack for a team of developers.
- Designed the development processes, workflow, and introduced scrum basics.
Senior Front-end Developer
Redact Media
- Wrote the front-end code for extremely high traffic websites (1.5 million users per day).
- Built internal admin tools based on Angular.
- Worked in an Agile-driven (Scrum) environment; the core of the work had a strong focus on website load performance and optimization.
- Implemented long-term (more than a year) SEO optimizations and advertisement campaigns for maximum user conversion.
- Researched and made technology and solution choices.
- Defined the architecture.
- Implemented unit and functional testing.
- Developed build process and deployment strategies.
IT Administrator
Białystok University of Technology
- Managed 250+ Windows workstations and other devices.
- Wrote the specifications for and managed the implementation of EU-financed projects.
- Managed a campus network and its devices.
- Provided everyday tech support for science and administration employees of the university.
- Analyzed and repaired hardware failures of the user workstations.
- Worked with software and hardware vendors in providing the best quality tools for university employees.
Developer
Freelance Work
- Worked on various simple and basic web development projects on a freelance basis.
Experience
Extremely High-traffic Media Website
My everyday tasks mainly focused on code quality and optimization to achieve the best performance and load times under various conditions. This included building back-end tools supporting the project, some of them were plain PHP/jQuery applications and some of the tools were already written in Angular.
The project was built by an agile team working in a scrum environment. Unfortunately, I am unable to share the link to the project.
OS Library | WordPress Architecture Stack and Starter Theme
https://github.com/LowGravityPL/RaccoonWPIt focuses on security, ease of configuration of environments, and improved deployments and performance. The main selling point is that it tackles is data separation. It also comes with a starter theme based on Twig. The library was released recently but the most of the code of this library runs on production websites that I've built in the past.
Education
Master's Degree in Information Technology in Economics
Bialystok University of Technology - Bialystok, Poland
Certifications
Certified Scrum Developer (CSD)
Scrum Alliance
Certified ScrumMaster (CSM)
Scrum Alliance
Skills
Libraries/APIs
jQuery, Preact, React, Google Maps, Backbone.js, Facebook API, Instagram API, Node.js
Tools
Git, Webpack, Gulp, Grunt, Jenkins, Adobe Lightroom, Plesk, PhpStorm, Composer, Sketch, Mercurial, Adobe Illustrator, Adobe Photoshop, PM2, Ghost
Languages
HTML, JavaScript, CSS, PHP, SQL
Platforms
WordPress, Linux, MacOS, Windows
Paradigms
Refactoring, Pair Programming, Scrum, Agile, DevOps, Test-driven Development (TDD), Object-oriented Programming (OOP)
Frameworks
AngularJS
Storage
Azure Active Directory, MySQL, MongoDB
Other
Performance Analysis, Code Review, Server Administration, System Administration, Linux Administration, Cisco, MikroTik, Front-end
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