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Marko – React Native, React, Node.js, experts in Lemon.io

Marko

From Montenegro (GMT+2)

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Full-stack Web DeveloperSenior
Mobile DeveloperSenior
Hire developer
6 years of commercial experience
AI
Blockchain
Cryptocurrency
E-commerce
Tourism
Mobile apps
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Marko – React Native, React, Node.js

Marko would be an excellent choice if you are seeking a dedicated, proactive, and detail-oriented developer with expertise in React Native, React, and Node.js. He enjoys crafting well-organized code and continually honing his skills. If there's a new technology trending, he'll undoubtedly be among the first to explore it.

Main technologies
React Native
2.5 years
React
1 year
Node.js
3 years
Typescript
2 years
Next.js
1 year
Additional skills
Express.js
Android
Java
JavaScript
Blockchain
MongooseODM
ElasticSearch
Firebase
Android Studio
MySQL
Crypto
MongoDB
Tailwind CSS
PostgreSQL
REST API
Ready to start
ASAP
Direct hire
Potentially possible

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Experience Highlights

Blockchain / Backend / React Native developer
Aug 2020 - Ongoing4 years 5 months
Project Overview

It is a euro stablecoin.

Skeleton
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Responsibilities:

Backend:

  • Build from scratch
  • Using a custom framework around ExpressJS written in TypeScript
  • Using MongoDB database
  • Talking with Ravencoin nodes to confirm transactions with restricted assets
  • Implemented dynamic links and notifications with Firebase
  • Implemented Liveness check

React Native App:

  • Written in React Native with TypeScript
  • Implemented Liveness check
  • Logging in using Biometrics
  • Redux for state management
  • Building for both Android and iOS

Liveness Check:

  • Implemented in the App with expo-camera and expo-face-detector for getting the face data and custom process for confirming the user has done the necessary steps
  • Only send the confirmed face images to the backend for additional confirmation, to reduce the server load
  • Implemented on the backend with face-api and a similar process as in the App

AI:

  • Internal ChromaBD Vector Database
  • OpenAI's Chat GPT as the backing model
  • LangChain for communication between all the parts

Single-purpose Web Apps:

  • Done in NextJS, most with the T3 stack
  • Custom Auth SDK similar in structure to NextAuth
  • Working with the Blockchain using WalletConnect
  • Exchange Widget for Perper's utility token Perun
Project Tech stack:
React Native
Node.js
Typescript
Crypto
Blockchain
MongoDB
AI
Lead Developer
Jun 2024 - Sep 20243 months
Project Overview

A digital booklet that includes a map of the local city, with a list of detailed trails whether for walking or bike riding. It comes with an AI chatbot that helps tourists find different Points of Interests within the city.

Skeleton
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Responsibilities:
  • Created the backend from scratch in TypeScript
  • Created the App in React Native with Expo
  • Implemented local state using Jotai
  • Connect the Chatbot with the Perper's AI, with custom content stored in the ChromaDB
  • Created a custom translations API
Project Tech stack:
React Native
Expo
Typescript
Prisma
Developer
Aug 2023 - Aug 2023
Project Overview

A small library that translates the types from Rust to TypeScript for better integration for the invoke function from Tauri.

Skeleton
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Responsibilities:
  • Create the library implementation
  • Made the proc-macro
Project Tech stack:
Rust
Typescript
Back-End / Android Developer
May 2019 - Nov 20212 years 5 months
Project Overview

It is a platform for people to buy or sell anything they want.

Skeleton
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Responsibilities:
  • Worked on and improved the system architecture
  • Made the Node.JS backend release ready
  • Implemented new features
  • Implemented full-text search using Elastic Search
  • Implemented filtered search using Elastic Search
  • Implemented notifications using Firebase
  • Moved backend from using MySQL to using MySQL clusters
  • Made the Android App written in Java release ready
  • Implemented notifications and Dynamic Links using Firebase
  • Implemented new features
  • Worked on React Native app for iOS
Project Tech stack:
Android
Android Studio
Java
React Native
Node.js
MySQL

Languages

English
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