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Dariusz – Node.js, React, PostgreSQL, experts in Lemon.io

Dariusz

From Poland (GMT+2)

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Full-Stack Web DeveloperSenior
Hire developer
5 years of commercial experience
Business intelligence
Computer science
Data analytics
E-commerce
Event management
Food and beverages
Gambling
Hospitality
Human resources
Sports
Enterprise software
GIS software
Mobile apps
Platforms
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Dariusz – Node.js, React, PostgreSQL

Dariusz is a skilled full-stack developer with a strong focus on Node.js and React.js. He approaches his work with confidence and a results-oriented mindset, constantly striving for skill development and improvement. With his dedication and expertise, Dariusz is well-equipped to be a valuable asset to your team, contributing to the achievement of your project goals.

Main technologies
Node.js
2 years
React
3.5 years
PostgreSQL
3 years
Typescript
3.5 years
Additional skills
Nest.js
TypeORM
JavaScript
Next.js
Jest
Microservices
Kafka
Redux
Prettier
Styled-components
HTML
Redis
Stripe API
Socket.io
Material UI
Enzyme
Firebase
Google Maps API
Docker
Nginx
ElasticSearch
Ready to start
ASAP
Direct hire
Potentially possible

Experience Highlights

Senior Back-End Developer
Mar 2022 - Sep 20225 months
Project Overview

Application for managing service locations such as hotels, restaurants, etc. Allows you to onboard employees, store documents, assign tasks, create reports, run courses, and much more.

Skeleton
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Responsibilities:
  • Created back-end architecture
  • Built front-end components library
  • Wrote unit tests
  • Made integration and e2e tests
  • Integrated with payments providers
Project Tech stack:
Next.js
Nest.js
PostgreSQL
TypeORM
Typescript
Jest
React
Socket.io
Stripe API
Senior Full-Stack Developer
Nov 2020 - Sep 20221 year 10 months
Project Overview

An application that integrates all food delivery channels available on the market. Allows you to operate services such as Uber Eats, Volt, Bolt Food, Takeaway, Glovo from a single tablet. In addition, it allows users to manage restaurant menus, product availability, and order statuses. It also has integration with bill printers.

Skeleton
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Responsibilities:
  • Created front-end and back-end architecture
  • Debugged and resolved the application issues
  • Integrated with food delivery channels providers
  • Resolved scale problems
  • Handled order queue
  • Was responsible for designing complex menu architecture
  • Handled menu parsers
  • Was in charge of maintaining order status, synchronization and more
Project Tech stack:
Microservices
Nest.js
PostgreSQL
Redis
Kafka
TypeORM
Typescript
React
Socket.io
Stripe API
Front-End Developer
Jul 2021 - Mar 20228 months
Project Overview

An application that allows betting on sports events.

Skeleton
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Responsibilities:
  • Created front-end architecture
  • Redesigned the existing front-end
  • Integrated with betting suppliers
  • Developed a way to continuously refresh the results
  • Made the app compatible with mobile views
  • Added all the restrictions required by law (because it's gambling) - such as verifying the age of the player
Project Tech stack:
Typescript
React
CSS
HTML
Material UI
Prettier
Front-end Developer
Apr 2021 - Aug 20214 months
Project Overview

A platform that improves the analysis of geographic data combined with population data in a selected area, allowing better business operations planning. Allows customers to get information about people's behavior in the selected area.

Skeleton
Skeleton
Skeleton
Responsibilities:
  • Created the front-end of the application from scratch
  • Planned the structure of the front-end
  • Integrated with the back-end
  • Developed a way to provide translations
  • Developed a way to display maps with overlaid layers
  • Built a library of reusable components
  • Was responsible for parsing data into a form that is convenient for the front-end
Project Tech stack:
Typescript
React
Styled-components
CSS
HTML
Prettier
Front-End Developer
May 2020 - Apr 202111 months
Project Overview

A large corporation, a direct competitor of Salesforce. They decided to do a big refactoring of the entire system, which was outdated, and move it to React.

Skeleton
Skeleton
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Responsibilities:
  • Built front-end components library
  • Wrote unit tests
  • Made integration and e2e tests
  • Built components to allow flexible use
  • Adapted components to work with people with disabilities
Project Tech stack:
Typescript
React
Enzyme
CSS
HTML
Prettier
Front-End Developer
Nov 2020 - Apr 20215 months
Project Overview

A platform to improve the functioning of funeral homes.

Skeleton
Skeleton
Skeleton
Responsibilities:
  • Created front-end architecture
  • Redesigned the existing front-end
  • Debugged and resolved the application issues
  • Built front-end components library
Project Tech stack:
Typescript
React
Redux
CSS
HTML
Styled-components
Prettier

Education

2019
Electrical Engineering
Engineer
2020
Computer Science
Master

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