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Andrzej – React, Node.js, Typescript, experts in Lemon.io

Andrzej

From Malaysia (GMT+8)

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Full-stack Web DeveloperSenior
Hire developer
8 years of commercial experience
Art and creativity
Banking
Communications
Construction
Credit and lending
E-learning
Edtech
Event management
Management
NFT
Public services
Social impact
Social media
Transportation
Travel
Communication tools
LMS
Platforms
Lemon.io stats
2
projects done
1158
hours worked
Open
to new offers

Andrzej – React, Node.js, Typescript

Andrzej is a confident Senior JavaScript Full-Stack Developer with extensive knowledge of networking, specializing in both React and Node. As an AWS expert with leadership experience, he excels at finding optimal code solutions for projects of varying complexity and ensuring smooth execution. Moreover, he is a great conversationalist and an easy-going person. Overall, Andrzej is an exceptional choice for any project.

Main technologies
React
4 years
Node.js
4 years
Typescript
4 years
JavaScript
4 years
Next.js
1 year
Additional skills
PostgreSQL
MongoDB
Docker
Express.js
Redux
AWS
Cassandra
GraphQL
Apache Solr
Microsoft SQL Server
Redux Saga
Reselect
Styled-components
React Query
WebSocket
Oracle
Golang
Tailwind CSS
Vercel
Prisma
Python
Rewards and achievements
June 2024: Karina Summary
Ready to start
preferably in a week after the offer/immediately if necessary
Direct hire
Potentially possible

Experience Highlights

Senior Full-stack Developer and Architect
Nov 2022 - Dec 20231 year 1 month
Project Overview

Content creators management platform.

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Responsibilities:
  • Designed and deployed background scraping jobs to AWS K8s cluster;
  • Conducted external API reverse engineering;
  • Implemented performance optimizations.
Project Tech stack:
Typescript
React
Next.js
tRPC
Prisma
Playwright
Vercel
AWS
Chrome extensions
Kubernetes
Amazon S3
React Hooks
HTML
CSS
Tailwind CSS
Docker
Containers
Web scraping
Puppeteer.js
Front-end Developer
Nov 2021 - Jan 20222 months
Project Overview

A global fine art platform that combines art trading, NFT, and data product components.

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Responsibilities:
  • Redesigned the registration and artwork sale forms, for which he needed to get up to speed with Shopify very quickly;
  • Contributed to redesigning the NFT artwork minting process (React code and Cypress.io tests).
Project Tech stack:
Typescript
Next.js
React
Full-stack Developer
Jan 2021 - Apr 20213 months
Project Overview

From the scratch development of a search tool for mortgage optimization leads.

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Responsibilities:
  • Delivered a fully functional MVP rapidly, with a focus on quality;
  • Configured and deployed the solution to the AWS cloud (Amplify, Beanstalk, Lambda).
Project Tech stack:
Typescript
AWS
Node.js
React
GraphQL
HTML
CSS
Front-end Developer
Nov 2020 - Mar 20214 months
Project Overview

It is an innovative construction plant management software.

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Responsibilities:
  • Developed the MVP as a sole Front-end Developer;
  • Managed to maintain the code quality despite the high pace of the project;
  • Did WebSocket API integration with the back-end.
Project Tech stack:
Typescript
React Query
AWS
React
REST API
Web Sockets
HTML
CSS
Styled-components
Lead Front-end Developer
Jul 2019 - Mar 20208 months
Project Overview

It is an innovative social platform for sharing and discovering news and media.

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Responsibilities:
  • Consistently reduced the technical debt by transitioning from Immutable.js to native JavaScript;
  • Carried out performance optimizations (resulting in the reduction of unnecessary React rerendering), refactorings improving code quality, and UX improvements.
Project Tech stack:
Redux
Redux Saga
Reselect
AWS
Styled-components
React
Full-stack Developer
May 2018 - Dec 20187 months
Project Overview

It is an obituary generator web app.

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Responsibilities:
  • Did front-end form performance optimizations and centralized form validation;
  • Optimized GraphQL queries which improved page load time as well as significantly lowered the amount of data stored in the DB;
  • Did various refactorings to improve code quality.
Project Tech stack:
Redux
GraphQL
Apache Solr
Microsoft SQL Server
Docker
React
Node.js
Full-stack Developer, Architect
Aug 2017 - Apr 20187 months
Project Overview

It is an educational measurement and evaluation system based on the QTI standard.

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Responsibilities:
  • Designed and built a zero-downtime system with the capability of handling over 500 hits/s with the minimum hardware setup, linearly scalable;
  • Used Cassandra as the data store, to meet the high availability and scalability requirements;
  • Сonfigured and deployed the entire solution to the AWS cloud (ECS, S3, CloudFront).
Project Tech stack:
Redux
Cassandra
AWS
React
Node.js
Koa.js
Amazon ECS
Amazon S3
Amazon CloudFront
Full-stack Developer, Architect
Feb 2017 - Jul 20175 months
Project Overview

It is an educational workshop platform.

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Responsibilities:
  • Designed, developed, and deployed the entire software solution;
  • Integrated the app with Google Maps API;
  • Was responsible for the deployment and configuration of the solution server-side.
Project Tech stack:
Redux
MongoDB
React
Node.js
Express.js
Google Maps API
Test Support and Integration Engineer
Sep 2015 - Jun 20169 months
Project Overview

Development and integration of Ericsson Order Care system for a public transport operator in the Netherlands.

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Responsibilities:

Conducted functional smoke testing and integration for Order Management System. Integrated the solution in production environment, managed test automation (using Selenium) and provided technical support.

Project Tech stack:
Oracle
Selenium
Selenium WebDriver
SoapUI
SOAP
Bash
Full-Stack Web Developer, Designer, Architect
Oct 2014 - Oct 20151 year
Project Overview

Social lending platform

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Responsibilities:

Designed and developed a social lending platform using Django framework

Project Tech stack:
Django
Django REST
Python
Bootstrap
JavaScript
jQuery
PostgreSQL
CentOS

Education

2012
Telecommunications & Computer Science
Master of Science

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