Slawomir K.

Lead Developer

485 dollar
Freelancer
11 ans
Białystok , POLOGNE

Mon expérience

SupersideApril 2019 - Présent

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JSFactoryDecember 2018 - March 2019

I was assigned to work together with partner team on their react-native application.

I was responsible for preparing the production-ready Android release of an existing, iOS-only React-Native application. The biggest challenge was the React-Native performance on Android. To accomplish my task, I profiled the application and improved its overall performance.
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JSFactoryMarch 2018 - October 2018

I was assigned to work together with partner's team on the fleet management software.

Working here I utilized my Golang and Node.js knowledge. My key responsibility was implementing GraphQL and gRPC endpoints that communicated with other microservices or client applications.
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X-TeamJanuary 2015 - March 2018

As one of X-Team's Senior Developers, I was assigned to work together with partners’ teams on their projects.

Working on these projects, I got to fully leverage my full-stack development skills along with my React, and Redux knowledge. Among other things, I was tasked with:
- Ensuring that our code is well tested
- Implementing internal tools used every day by other team members
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JSGeeksJune 2013 - January 2015

Working at JSGeeks allowed me to take full advantage of my JavaScript skills and improve them even more. Apart from technical skills, I was responsible for communicating with remote team and reporting progress to the project owners.
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Black LabelSeptember 2010 - June 2013

I was responsible for providing first-line support at Highcharts forum. After a few months I got promoted and my responsibilities had changed. I was dedicated to providing custom Highcharts implementations for Black Label partners, and contributing to the Highcharts source code.

Working at Black Label and Highcharts I gained perfect JavaScript and SVG knowledge.

Mes compétences

Technologies

AWS, Web development, React.js

Middleware

Jenkins

Languages

Ruby on Rails, HTML, Ruby, GraphQL, Python, JavaScript, HTML5, SQL, PHP

Mobile

Android, React Native

IT Infrastructure

Docker, iOS, Linux, Git

Frameworks

Redux, Highcharts, Node.js, Django

Protocols

gRPC

Databases

MySQL, Redis, PostGreSQL

Mes études et formations

Machine Learning - Coursera2017 - 2017

Bachelor's degree, Human Computer Interaction - Uniwersytet Jagielloński w Krakowie2008 - 2011