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Bartosz – React, Next.js, Typescript, experts in Lemon.io

Bartosz

From Poland (GMT+2)

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Front-end Web DeveloperSenior
Hire developer
6 years of commercial experience
Administration
Analytics
Cybersecurity
Data analytics
E-commerce
Gambling
Gamedev
Manufacturing
Marketing
Retail
Sales
Travel
B2B2C
Enterprise software
Geospatial software
Mapping software
Platforms
Gaming software
Lemon.io stats
1
projects done
825
hours worked
Open
to new offers

Bartosz – React, Next.js, Typescript

Bartosz is a motivated Senior Developer skilled in React/Next.js and TypeScript. With some prior experience at major tech companies, he can contribute to projects of any scale. Bartosz's cheerful personality, Bachelor's degree in Engineering, and familiarity with retention marketing, e-commerce, and gambling domains make him a valuable asset to diverse projects.

Main technologies
React
5 years
Next.js
3 years
Typescript
3 years
Additional skills
Gatsby.js
JavaScript
HTML
Angular JS
Karma
Angular
SASS
Enzyme
SCSS
Cypress
CSS
Tailwind CSS
Material UI
Zustand
Svelte.js
Prompt engineering
OpenAI
OpenAI API
Material Design
Rewards and achievements
Big tech veteran
Ready to start
17th of June
Direct hire
Potentially possible

Experience Highlights

Senior Front-End Developer
Jun 2023 - Ongoing1 year
Project Overview

Complex CRUD application for managing different packages of digital assets.

Skeleton
Skeleton
Skeleton
Responsibilities:

He was responsible for implementing new complex features, which needed to be specifically aligned with the visual aspects.

Project Tech stack:
SASS
React
Jest
Cypress
Typescript
Senior Front-End Developer
Jun 2022 - Jan 20241 year 7 months
Project Overview

This is a retention marketing that helps you sell more.

Skeleton
Skeleton
Skeleton
Responsibilities:
  • created Data Tables and their features (searching, sorting, deleting, adding, editing, reading, copying, expanding, moving, etc.);
  • connected structured and complex data structures coming from the Backend in the most efficient way to the front-end;
  • created and mixed different types of data and presenting them on various of different charts;
  • adjusted tools for managing communication through the whole globe and approximately 20 different timezones
Project Tech stack:
React
Typescript
JavaScript
HTML
CSS
SCSS
Material UI
Moment.js
Redux
Redux Thunk
Redux Toolkit
Algorithms and Data Structures
Senior Front-End Developer
May 2022 - Jul 20231 year 2 months
Project Overview

While working in this company, Bartosz built a highly advanced MVP. It was a piece of software that was supposed to fill all of the mandatory rules expected from the vessel's software but still look simple, fresh, modern, and automated.

Skeleton
Skeleton
Skeleton
Responsibilities:
  • used React to create an SPA application and present maps, docs, routes, etc.;
  • was responsible for delivering and managing the Design System needed for the entire company, creating them with web components using Svetle;
  • implemented complex ideas;
  • improved the performance.
Project Tech stack:
React
MapBox
Zustand
Typescript
SCSS
Apollo GraphQL
Node.js
Svelte.js
Web Components
Senior Front-End Developer
May 2020 - Feb 20221 year 9 months
Project Overview

This is a gambling platform where users can play various different gambling games provided by tons of 3rd party providers. The thing that distinguishes it from other platforms is its security. We developed various different tools for helping users feel safe and secured (e.g limiting the time of the user's play, limiting and monitoring his "hype" for the play, predicting his addiction to gambling, etc.). The project is exposed to 15 markets and was also obligated to keep our platform compliant with all of the different laws in different countries, so we also needed to discuss tons of things with people from different countries to properly align our platform to their requirements.

Skeleton
Skeleton
Skeleton
Responsibilities:
  • implemented new features (e.g., tools for limiting the time of the user's play);
  • maintained application (e.g., fixing bugs, improving some parts of the app, etc.);
  • created POCs (Bartosz was one of the people who were responsible for preparing and executing a plan for the migration to the newer technology);
  • mentored two junior developers (he was discussing with them their weaknesses and strengths and properly helping them to overcome some problems they encountered and, at the same time, helping them grow)
Project Tech stack:
Angular JS
React
Next.js
Typescript
Node.js
Cypress
Karma
Enzyme
react-testing-library
Front-End Developer
May 2020 - Aug 20203 months
Project Overview

The project was a huge back-office-like platform where clients could easily accommodate their e-commerce online shops. Platform shared tons of features e.g:

  • managing various social media platforms and chats in one place,
  • managing prices of all products (discounts, history of changes, etc.),
  • position of certain products on the B2C page, and many others.
Skeleton
Skeleton
Skeleton
Responsibilities:
  • developed and provided expanded and original CMS/ERP products attached to the e-commerce industry;
  • discussed problems clients and management faced during development;
  • implemented prepared layouts with expected mechanisms;
  • proposed fixes and replacements for the solutions the client wasn't happy about;
  • managed the work of other members of the team.
Project Tech stack:
React
Typescript
SCSS

Education

2020
Information Technology with the expertise of Web Technologies
Bachelor of Engineering

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