Dariusz Krawczyk

Dariusz Krawczyk

ABOUT ME
Full time MERN (MongoDB/Express/React/Node.js) Developer - with 7+ years of frontend and backend development
Full time MERN (MongoDB/Express/React/Node.js) Developer - with 7+ years of frontend and backend development

I'm a highly driven MERN stack developer with a vast skill set and strong affinity over 7 years. Most of my career has been focused on website/app development and media publishing within the realm of online marketing, e-commerce and social media.
Expertise skills: JavaScript/RxJS, React.js/Next.js/GatsbyJS/Redux, React Native, Vue.js/Nuxt.js, HTML, CSS, Node.js, ExpressJS, Python, PostgreSQL, MySQL, MongoDB, GraphQL/Apollo, Firebase, Twillio, AWS, GCP, Heroku, ElasticSearch, Azure, DevOps, Mocha/Chai, Jest, Karma
I specialize in creating RESTful APIs, web user interfaces (UI) with high quality user experience (UX), conversion rate and performance optimization.
Apart from user engaging web design, I pride myself in the possession of qualities often overlooked and not so easily taught in the competitive world we live in:
• I'm easy to communicate with.
• I'm easy to get along with.
• I hold integrity to a very high standard in what I do.
• My desire is for those I work with to be completely satisfied with the job I have done for them.
• I'm passionate about taking any problem you have and providing you with an effective solution.
I am customer oriented and able to contribute as a productive team.
Thanks!

Polish, English
Warsaw (+02:00)
Joined January 2020
EXPERTISE
7 years experience
I have worked with React for 7+ years when I startetd my career as MERN stack developer. As a React.js developer, I have been involved fr...
I have worked with React for 7+ years when I startetd my career as MERN stack developer. As a React.js developer, I have been involved from conception to completion with Projects that are technologically sound and aesthetically impressive. Since Aug 2019 I have been joined Corva project - the Amercian best Drilling online project using my React/Redux skills. Since May 2019, I became the major developer for main drilling comprehension part of project using React Hook. The most valuable experience on Corva project was using Web pack and Babel for customization of React applications for improving speed of data process. This requirements were often required for big engineering and financial projects. Besides I have worked 2+ years for Scout & Cellar frontend developerment as lead Gatasby developer. In detail, I was responsible for development of new highly-responsive, web-based user interface.
GatsbReduxMaterial-UI
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7 years experience
I have dedicated myself for NODE development as a MERN stack developer. Expecially, with Express - the most popular Node framework, I hav...
I have dedicated myself for NODE development as a MERN stack developer. Expecially, with Express - the most popular Node framework, I have worked about 7 years as backend part of a Corva team for developing APIs, middleware applications and services using Agile development methods. That was a proud career that I contributed to my team and organizational improvements in process and infrastructure. Since I used React and Node for development, almost team members called me versatile developer.
7 years experience
I have used my MogoDB ability for common purposes for Single View, Internet of Things , Real-Time Analytics, Personalization, Catalog, a...
I have used my MogoDB ability for common purposes for Single View, Internet of Things , Real-Time Analytics, Personalization, Catalog, and Content Management. Especially MonogDB was typical database for huge amount of data processing required from engineering and financial projects. For completion of financial aspect of Corva project , MogoDB was so effective in trade repository. Financial institutions were mandated to store trade data for 3 years or more. A global leader in research and investment management has been able to reduce costs by scaling out data storage on commodity hardware. MongoDB’s flexible schemas enables them to integrate diverse trades in a single database.
MeteorNode.js
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MeteorNode.js
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7 years experience
I have worked 7+ years with HighChart when chart skills were required in Project trello. Having wored for several frontend projects I hav...
I have worked 7+ years with HighChart when chart skills were required in Project trello. Having wored for several frontend projects I have felt highchart is the most proper chart library to me. I am confident at using highchart + React and highchart + AngularJS. Using Highchart which is commonly used for interative web application, I could realize a wide array of chart types such as angular gauges, scatter, pie, bar, column, area spline, line, waterfall, funnel, error bars, box plot, and bubble required for various pruposes in vairous projects. I could also share my data with prospective clients, superiors, and customers.
6 years experience
When I was doing project for Corva and Scout & Cellar, there happened restricted data control that is brought back from an API edge so we...
When I was doing project for Corva and Scout & Cellar, there happened restricted data control that is brought back from an API edge so we should switch method of buidling API into another way. GraphQL was the best choice here because it only rebounds the data that’s needed so recent facilities can be included through latest types and fields without triggering a breaking change. While using GraphQL, I could conveniently deprecate a field. GraphQL made it incredibly effortless to monitor particular field usage. API holders can get across to the specific clients employing fields that are pulling out.
5 years experience
I have worked with PHP for several projects. When I start web development as a beginner PHP was convenient to code onto frontend side. Si...
I have worked with PHP for several projects. When I start web development as a beginner PHP was convenient to code onto frontend side. Since using Wordpress and laravel, PHP was also useful for development and customization. Though I am MERN stack I have still good knowledge of PHP.
4 years experience
I have worked 4 years for a full stack of Vue app with Node, Express and MogoDB. For building a booking platform, I configured the develo...
I have worked 4 years for a full stack of Vue app with Node, Express and MogoDB. For building a booking platform, I configured the development environment with installation of Eclipse IDE, CodeMix and Vue pack. I have built Vue Frontend and Node backend seperately. For Vue frontend, axios was used for Web Service calls and Bulma CSS work was used for styling. Rather than using fetch which was often used in React applications, axios was more useful because it is JavaScript library used to make http requests from node. js or XMLHttpRequests from the browser and it supports the Promise API that is native to JS ES6. For next steps, I added Authentication and perfect folder sturucture as well as better management using Vuex.
Javascript, vuejsNode.jsMongoDB
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Javascript, vuejsNode.jsMongoDBVuex
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EMPLOYMENTS
Senior Software Engineer
Ideasoft
2017-09-01-2019-04-01
As a part of consultant team my major role was to lead the development team in order to complete customer's orders. It involved so many o...
As a part of consultant team my major role was to lead the development team in order to complete customer's orders. It involved so many orders from small website customization to big engineering jobs such as Corva.com. I have used MERN stack and deployed almost sites to AWS. They were all supported under serverless framework by using lambda functions on Amazon.
MySQL
Meteor
MERN Stack
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MySQL
Meteor
MERN Stack
Angualr
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Website Developer
Tirolpi USŁUGI NA WTRYSKARKACH
2014-02-01-2017-07-01
In this company I have worked 3+ years as an individual contributor in its IT team. My major job was to build marketing site and manage t...
In this company I have worked 3+ years as an individual contributor in its IT team. My major job was to build marketing site and manage the full performance of site.
MySQL
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MySQL
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PROJECTS
Scout & Cellar Shopping SiteView Project
Sarah Shadonix
2018
The role of this site was for advertising stuff from this wine company and let visitors buy usig shopping carts. By using React material ...
The role of this site was for advertising stuff from this wine company and let visitors buy usig shopping carts. By using React material ui, realized UI/UX design of site - perfect for view and mobile responsive. For its funtionalites, Gatsy - react framework was effectively used. Otherwise I helped backend team to build and run Node backend fully. I have deployed source to AWS and also built serverless architecture for considering the case of Node backend is no needed.
Node.js
React
Gatsby
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Node.js
React
Gatsby
Webpac
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