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Andrei – React, GraphQL, React Native, experts in Lemon.io

Andrei

From Romania (GMT+3)

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Full-stack Web DeveloperMiddle-to-senior
Hire developer
6 years of commercial experience
Beauty
E-commerce
Edtech
Entertainment
Healthcare
Healthtech
Sports
AI software
Platforms
Lemon.io stats
2
projects done
1283
hours worked
Open
to new offers

Andrei – React, GraphQL, React Native

Andrei is a highly competent Middle Full-Stack Developer with a robust set of problem-solving skills. His practical approach to development is evident, as his expertise stems directly from hands-on experience in real-world projects. Andrei's portfolio includes a diverse range of projects such as a healthcare application, a sports equipment rental app, and a unique app that enabled kids to virtually meet Santa during the COVID-19 pandemic. His versatility and practical knowledge make him a valuable asset in various development environments.

Main technologies
React
1 years
GraphQL
1 years
React Native
1 years
Node.js
3 years
Next.js
2.5 years
Additional skills
JavaScript
Typescript
Redux
Lodash.js
WebSocket
AWS
Socket.io
MySQL
Nest.js
NoSQL
Amplify
Cognito
Expo
Firebase
PostgreSQL
OpenAI API
Ready to start
start of june
Direct hire
Potentially possible

Experience Highlights

Full-Stack Developer
Jul 2022 - Jan 20236 months
Project Overview

The product is designed to help children develop their cognitive skills with the aid of AI, prompting them to make up stories from scratch or based on a given storyline.

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Responsibilities:
  • Created the authentication process - frontend forms and logic, database structure, Cognito implementation;
  • Integrated OpenAI and Azure text-to-speech;
  • Developed the functionality and UI for the AI text to appear word-by-word as it's being spoken (by azure TTS) and connected the Viseme data to a talking avatar;
  • Refactored parts of the code that was too "clogged."
Project Tech stack:
React
Node.js
MySQL
AWS
OpenAI API
Front-End Developer / Tech Lead
Oct 2021 - Dec 20212 months
Project Overview

It is a web app used to search for beauty videos. Influencers post a video of themselves doing a make-up routine, and in the description, a link is added that takes them to this app, where they can buy all the products used in the video while watching it.

Main features:

  • See the list of products used in the video
  • Change the shade of the product to match your skin tone
  • Add products to the cart & checkout, and get all of the products in the same order
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Responsibilities:
  • Structured all the custom data we needed using what the backend solution of choice (Swell) had to offer;
  • Integrated with and sent data to Airtable so the back-office team could deal with the orders;
  • Created new features;
  • Handled direct communication with the client.
Project Tech stack:
Next.js
AWS
React
React Native Developer
Nov 2020 - Sep 20219 months
Project Overview

It is a platform for renting sports arenas that started in Canada and is now available in some cities in the US as well. Some of the main features are:

  • The main flow: select the area -> pick a sport -> pick an arena -> pick a time interval -> payment & confirmation
  • Pick up games - if someone else rents an arena but does not have enough players, you can pay part of the price and join them
  • Sports profile - users can add the level and their favorite position in each sport they are interested in
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Responsibilities:
  • Added scaling in the whole app;
  • Helped to refactor the app -> updated it to the latest React Native version, and rewrote all of the class components as functional components;
  • Added the multiple areas functionality when the app became available outside Toronto;
  • Mentored junior developers.
Project Tech stack:
React Native
Firebase
Full-Stack Developer
Aug 2020 - Nov 20202 months
Project Overview

It is a web app developed due to the COVID restrictions so that kids can meet with Santa Claus even during a pandemic.​

Main features:

  • Schedule a call with Santa Claus - you can add Mrs. Claus, set the number of kids that will join, etc.
  • Have Santa Claus send a personalized video for your kid.
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Responsibilities:
  • Created the backend part of the authentication process, using NestJS, Passport, and JWT;
  • Added new options to the scheduling form;
  • Refactored some of the older components.
Project Tech stack:
Node.js
PostgreSQL
Nest.js
React
Full-Stack Developer
Dec 2017 - Aug 20202 years 7 months
Project Overview

It is a patient decision support system that meets users where they are and motivates appropriate utilization of healthcare services.

Some of its main features are:

  • Medical journal: store, update and see the evolution of your allergies, symptoms, medicines taken, and more
  • Activity tracker: fitness & vitals, integrations with Fitbit, Withings, Garmin, Apple HealthKit, Google Fit, and iGlucose.
  • News: pick the categories you're most interested in and get the newest information in the app.
  • Food tracker: add the foods you eat in a day and get info about calories, nutrients, and more.
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Responsibilities:
  • Built most of the components of the mobile app;
  • Created integrations with third parties;
  • Developed the web admin panel;
  • Helped design the database architecture;
  • Interacted with and changed the AWS infrastructure;
  • Developed new features.
Project Tech stack:
Node.js
React Native
MySQL
AWS
React
GraphQL

Education

2024
Computer Science
Bachelor

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