Andrzej Fricze, Developer in Kraków, Poland
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Andrzej Fricze

Verified Expert  in Engineering

Web Developer

Kraków, Poland

Toptal member since November 17, 2022

Expertise
JavaScriptCSSReact.jsFull-stackGitReduxjQueryTypeScriptClojureGraphQL
Bio

Andrzej is a highly motivated web developer. His professional experience spans various industries and involves creating configuration panels for AI-driven chatbots, interactive maps for solar panel producers, and business intelligence tools for worldwide users. His clients include FANMAG companies. He is keen on mentoring other professionals to become better developers and tech speakers. Andrzej is committed to delivering high-quality software solutions that address his clients' problems.

Portfolio

Janea Systems
JavaScript, Testing, React, jQuery, TypeScript, User Interface (UI), Cypress...
Online Recruitment Platform
Webpack, CSS, Clojure, React, ClojureScript, E2E Testing, Git...
Freelance
React Native, iOS, Android, Firebase, Full-stack

Experience

  • JavaScript - 9 years
  • CSS - 9 years
  • Application State Management - 9 years
  • Redux - 6 years
  • React - 6 years
  • Functional Programming - 6 years
  • TypeScript - 4 years
  • RxJS - 4 years

Availability

Part-time

Preferred Environment

MacOS, Visual Studio Code (VS Code), React, JavaScript

The most amazing...

...client presentation I've been involved in required the implementation of live product changes in real time.

Work Experience

Senior React Developer

2021 - 2022
Janea Systems
  • Ported vital parts of a huge BI application from old, jQuery-based code into a new React/TypeScript codebase.
  • Measured application performance and implemented changes to make the React application faster and more reliable than the old one.
  • Created custom UI solutions to provide users with the best user experience.
Technologies: JavaScript, Testing, React, jQuery, TypeScript, User Interface (UI), Cypress, Jest, Git, Functional Programming, Application State Management, Redux, React Redux, HTML, Styled-components, JavaScript Testing

Clojure and ClojureScript Developer

2020 - 2021
Online Recruitment Platform
  • Improved the back-end code structure, introducing smaller, fine-grained modules. Made it easier to navigate the codebase and implement new features.
  • Recreated a front-end build process, introduced webpack, and wrote a missing plugin to handle CSS modules in ClojureScript.
  • Led the development of a new feed feature on the front page. This feature enables users to access all the latest job offers quickly.
Technologies: Webpack, CSS, Clojure, React, ClojureScript, E2E Testing, Git, Functional Programming, Application State Management, GraphQL, Figma, MongoDB, Full-stack, Amazon Web Services (AWS)

React Native Developer

2019 - 2020
Freelance
  • Created an application running on iOS and Android following Sketch designs.
  • Created a notification system with Firebase Cloud Messaging.
  • Supervised the process of publishing applications in the App Store and Google Play.
Technologies: React Native, iOS, Android, Firebase, Full-stack

Senior React Developer

2019 - 2019
Pragmatic Coders
  • Analyzed client requirements and created the first version of a customer management application, enabling the client to start collecting users' data.
  • Introduced tools and libraries that allowed a quick response to customer needs and implemented new features while keeping the existing ones intact.
  • Partnered with back-end developers to ensure time was used productively and the written code fulfilled the business needs.
Technologies: JavaScript, React, CSS, Git, Application State Management, RxJS, Redux, Functional Reactive Programming, React Redux, HTML, React Router, Material UI, JavaScript Testing

JavaScript Developer

2015 - 2016
Codete
  • Developed an app that allows customers to find their house on a map, place solar panels on the roof, and calculate all the parts required to mount the panels.
  • Introduced UX improvements while considering customers' opinions to increase customer satisfaction.
  • Mentored a junior front-end developer working on a time-bound project. Took care of his growth and ensured we delivered the project that fulfilled clients' needs.
  • Conducted application architecture evaluation for a client who had issues with an existing application. Identified main problems with code quality and architecture.
Technologies: JavaScript, Canvas, Google Maps API, Google Maps, Python, JavaScript Testing, Full-stack

Experience

Online Recruitment Platform Application

https://www.works-hub.com/
A Clojure, ClojureScript, and React-based application for recruiters and job seekers. I've contributed to the project as a full-stack developer, taking responsibility for keeping and improving code quality and implementing new features. We used third-party software and services, which allowed us to develop the application quickly with a small team of developers. The website is partially server-rendered and partially a SPA application. This division allowed us to serve public pages instantly while providing an elastic, interactive application for logged-in users. I developed vital, user-facing parts of the application and had an impact on making critical technical decisions.

Solar Panel Installation Designer

https://design.unirac.com/
A JavaScript application based on Google Maps and Canvas overlay. As a front-end developer, I created and optimized a customer-facing solution for designing solar panel installations. Working closely with the client and listening to customers' opinions allowed me to develop a performant and valuable product. It made the process of calculating and buying solar panel installation parts comfortable, easy, and accurate.

Skills

Libraries/APIs

React, React Redux, RxJS, jQuery, React Router, Google Maps API, Google Maps

Tools

Git, Figma, Sketch, JavaScript Testing, Webpack, Emacs, Spacemacs, Canvas

Languages

JavaScript, CSS, HTML, TypeScript, Clojure, GraphQL, Python

Frameworks

Redux, ClojureScript, Material UI, React Native, AngularJS, Cypress, Jest

Paradigms

Functional Programming, Functional Reactive Programming, Testing, E2E Testing

Platforms

MacOS, Visual Studio Code (VS Code), iOS, Android, Firebase, Amazon Web Services (AWS)

Storage

MongoDB

Other

Application State Management, Styled-components, Full-stack, User Interface (UI)

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