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Grzegorz – JavaScript, React, Vue.js, experts in Lemon.io

Grzegorz

From Poland (GMT+2)

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Full-stack Web DeveloperSenior
Hire developer
14 years of commercial experience
Art and creativity
Computer science
Customer support
Entertainment
Gambling
Public relations
Public services
Renewable energy
Communication tools
CRM
Dev tools
Enterprise software
Lemon.io stats
4
projects done
358
hours worked
Open
to new offers

Grzegorz – JavaScript, React, Vue.js

Greg is a senior software engineer with 13 years of experience and a background in graphic design. He is passionate about mentoring and sharing his knowledge with others and is ready to cope with any React + Node project. Greg is also our tech interviewer, and he worked on some of Lemon's projects so that we can ensure his quality.

Main technologies
JavaScript
12 years
React
6 years
Vue.js
3 years
Svelte.js
2 years
Typescript
3 years
Node.js
5 years
Additional skills
Vanilla JS
Agile
Contentful
Bootstrap
Cloud Computing
Chai
Design system
GitLab
Express.js
Handlebars
DRY
Foundation
GitHub Actions
ESLint
Docker
Cypress
Enzyme
GitHub
Hapi.js
Heroku
Jasmine
JSON
Jest
jQuery
JWT
Kanban
Linux
MacOS
Microservices
Microsoft Azure
MVP
MVC
Mocha
OOP
Redux
Redux Thunk
Postman
REST API
OpenAPI
Socket.io
Tailwind CSS
UI/UX
Unit testing
Vuex
CI/CD
Webpack
Web Components
Require.js
AJAX
WebSocket
Storybook
Svelte-kit
Web Components
Polkadot
MongoDB
Serverless Computing
Vite
Directus
Polka.js
MySQL
Rewards and achievements
Tech interviewer
June 2024: Susanna Summary
Ready to start
ASAP
Direct hire
Potentially possible

Experience Highlights

One-man army
May 2023 - Nov 20236 months
Project Overview

Hosting Services website and CRM

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Responsibilities:
  • designed (UI + architecture), coded and deployed the whole solution
  • built CRM based Notion API
  • used Directus as at-build-time headless CMS
  • built PM2 managed microservices using Polka.js
  • configured continuous deployment via GitHub Actions to a FreeBSD VPS
  • built client/service status CRON jobs
  • implemented automations with invoicing system API
Project Tech stack:
API
CI
CD
CSS
Cron
Directus
FreeBSD
GitHub
GitHub Actions
Microservices
Monorepo
Node.js
Polka.js
Postman
Product design
Responsive Web Design
SCSS
Svelte-kit
Svelte.js
Typescript
Senior Back-End Developer
Apr 2022 - Sep 20225 months
Project Overview

A mobile application and a multi-usage API communicating with corporate's instance of SAP CRM/ERP, handling all in-field chores for contractors, their reporting, and documentation of work being done

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Responsibilities:
  • Maintained and fixed existing API functionalities;
  • Added various new API features;
  • Initiated and led a migration process to "API v2" (from VanillaJS to Typescript).
Project Tech stack:
Microsoft Azure
Azure Functions
Cosmos DB
Azure Blob Storage
Typescript
Node.js
Senior Full-Stack Developer
Jan 2021 - Mar 20221 year 2 months
Project Overview

A bespoke system to see and control the processes of wind farm installation for Vattenfall.

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Responsibilities:
  • Contributed to the analysis of client's needs and wire-framing of the UI;
  • Created bootstrap project and base front-end components;
  • Mentored junior developers.
Project Tech stack:
Vue.js
Vuex
Microsoft Azure
Hapi.js
Microsoft SQL Server
Senior Front-End Developer
Aug 2021 - Mar 20227 months
Project Overview

Art market Due Diligence platform that is helping organizations and private investors comply and succeed with challenging regulations through an elegant, easy-to-use set of forms and creators.

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Responsibilities:
  • Created the whole front-end architecture for the new version of the app from scratch;
  • Built an engine for easy creation of step-by-step React forms;
  • Built StoryBook documentation for the components library.
Project Tech stack:
React
Storybook
Main Front-End Developer/Scrum Master
Aug 2017 - Jul 20213 years 11 months
Project Overview

This is a main corporate website for Germany (they also have others).

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Responsibilities:
  • Was responsible for templating and migrating jQuery front-end to OOP VanillaJS and VueJS;
  • Touched almost all parts of the legacy JavaScript and moved it to Azure Cloud;
  • Added CI/CD and unit testing.
Project Tech stack:
HTML
CSS
CSS (LESS)
Vanilla JS
Vue.js
Web Components
Svelte.js
Handlebars
Node.js
jQuery
Webpack
Jest
CI
CD
Azure Cloud
Senior Full-Stack Developer
Jul 2016 - Aug 20171 year 1 month
Project Overview

This were bespoke two-touchscreen "vending" machines serving betting opportunities for the clients.

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Responsibilities:
  • Developed new betting categories;
  • Fixed a handful of bugs;
  • Increased test coverage and performance;
  • Decreased bundle size and build time;
  • Migrated unit tests from Karma to Jest.
Project Tech stack:
HTML
CSS
React
Webpack
Node.js
Jest
WebSocket
Docker
CI
CD
CSS
SASS

Education

2004
Computer Graphics, Librarianship / Traditional Taxonomy Languages, Information Science, Information Technology
Bachelor's

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