Quentin Correa_

Fullstack Blockchain Developer

(+886) 988-840-398
[email protected]
Tainan, Taiwan


Hello world!
You need a full stack developer that gets things done? Read on!
I have been freelancing for over 3 years, with a focus on blockchain and IOT technologies.

Download CV


Quentin pursued a dual master degree in Aerospace Engineering, with a focus on Embedded Systems in which he first got in touch with the programming world.

After learning more about the business side of things through an IMBA, and increasing his developement skills through ventures and courses, Quentin started his freelance carreer in 2015.

He has since then been involved on many different projects, ranging from mobile applications to backend development, with a focus on dApps (decentralized blockchain apps) and IOT (Internet of Things).


National Cheng Kung University (Taiwan)

2015 - 2017

IMBA Degree

National Cheng Kung University (Taiwan)

2014 - 2015

MSc degree in Aeronautics and Astronautics
Specialized in Embedded Systems

IPSA (Polytechnical Institute of Advanced Sciences, France)

2008 - 2014

Astronautics and Aeronautics Engineering Degree (MSc equivalent) with mention
Major in Mechatronics Systems and Space Embedded Systems


Tico Messaging App

2018 - Now

Backend Developer

  • - Lead the backend developement
  • - Implement E2EE (End to end encryption)
  • - Devise an IOT Messaging system (phone to device)
  • - Train NLP model for messages categorization
  • - CI/CD with Git, Jenkins and CodeDeploy
  • - Build AWS infrastructure and migrate from Heroku (S3, EC2, CodeDeploy, VPC, Lambda)


2015 - Now

Full Stack Developer
Development of a wide range of projects:

  • - Backend development using Node.js, creation of REST APIs with Express framework.
  • - Frontend development using React.js + Redux.
  • - Chrome. Opera, Brave and Firefox extensions development for blockchain applications (see SteemPlus, Steem Keychain on the Chrome store).
  • - Native Android (Java) and React Native Development for private mobile applications.
  • - Development of private Android Apps using LORA Dongle to perform real-time tracing of work on huge plantations, using IOT networks.
  • - AWS deployments


2015 - 2017

Co-founder and Lead Developer

  • - Developed a native Android App and a Web APP aiming to let customers enjoy their waiting time outside of the waiting room.
  • - Managed a three person team in Taiwan.
  • - Ambassador "La French Tech" in Taiwan.
  • - First runner up of the GNSS Asia Challenge.

Dev skills

React.js 80%

Redux 70%

Node.js 90%

Express 80%

React Native 70%

Go 65%

NoSQL DB 80%

html5 90%

css3 70%

javascript 90%

Android (Native) 80%

AWS 65%

Relational DB 70%

Spoken Languages

English 100%

Chinese 60%

French 100%

Spanish 40%


Blockchain (dApps) 80%

Browser Extensions 85%

IOT 70%

Machine Learning 40%

My projects_



Tico is a messenger APP aiming at letting users focus on what matters by setting various filters.
Work on Tico encompassed the following:

  • - Leading the backend developement
  • - Implementing E2EE (End to end encryption) on messages (frontend).
  • - Devising an IOT Messaging system (phone to device)
  • - Training an NLP model for messages categorization
  • - Deploying to AWS


  • Node.js
  • Express
  • MongoDB
  • React Native
  • AWS
  • IOT


Splinterlands (aka Steem Monsters) is a digital collectible cards game built on the Steem blockchain.
Work on Splinterlands included the following :

  • - Work on front-end : total refactoring to implement localization.
  • - Creation of a backend routine job to create printable cards images programatically based on parameters (type of monster, lvl, statistics, type, rarity, etc.)


  • Angular
  • Node.js
  • Blockchain


SteemPlus is my own opensource browser extension (Chrome, Opera, Firefox) adding over 30 features to 3 different websites running on the Steem blockchain.
The APP changes UI elements on the 3 websites and allow users to perform additional interactions with the blockchain, originally not accessible from the said websites.
I have been developing the extension and making it available accross browsers to its 3k+ users for over almost 2 years and it has become an ubiquitous App on the blockchain.


  • Javascript ES6
  • HTML
  • CSS
  • Blockchain

SteemPlus Landing Page

SteemPlus landing page, created within a week for presenting SteemPlus at the SteemFest 3, this landing page introduces the extension features and gives key information about users statistics.


  • React.js
  • Redux
  • Blockchain

SteemPlus API

SteemPlus API is a Node.js project aiming to provide public APIs used by the extension and freely available to blockchain users.
These API parse information from the Steem blockchain, and also provide SteemPlus specific data.


  • Node.js
  • Express
  • Blockchain

Steem Keychain

Steem Keychain is a secure opensource wallet for storing private keys (using AES encryption) on the Steem and Avalon blockchains.
It is also an easy way to check one's value account, and perform transfers from the extension. Additionally, Keychain injects code on each new tab to let external websites make requests (for example a cryptocurrency transfer), that will be sent upon user's approval.
Although it is opensource, I was hired to develop this extension and am its main contributor.


  • Javascript ES6
  • HTML
  • CSS
  • Blockchain

Pacho Dashboard & Backend

Pacho is an IOT device mounted on a gas cylinder to track its usage and position.
This project was developed in the scope of the Sigfox HackingHouse IOT continent-wide (Asia) competition and was awarded the first price.
I was in charge of the deveolpment of a backend interfacing our Web App with Sigfox (IOT Operator) backend. On top of that, I developed the dashboard using React.js and Redux.


  • React.js
  • Redux
  • Node.js
  • Sigfox
  • IOT


Oasis is a multi-account management Web App for the Whaleshares blockchain.
I was hired to build the App for the ground up, including the following :
- Node.js backend handling ACLs, a RESTful API, and parsing of the blockchain for transactions.
- A WebApp allowing users to create rooms in which several users can enter their keys to curate content as part of a group.


  • React.js
  • Node.js
  • MongoDB
  • Blockchain


HappyQ was a set of native Android Apps and a Web App aiming to let customers enjoy their waiting time outside of the waiting room, by giving them an estimation of their waiting time, and an alarm to come back based on their location.
I developed this App natively for Android (Java) and the backend in PHP.
Due to financial reasons, the App never left Beta, but it is a pretty complex application that taught me a lot about mobile development.


  • Android
  • Java
  • PHP
  • RDB


I developed a set of three native Android Apps for Tanalys.
These applications are to be used by workers in plantations to collect real time data, even in the absence of 4G network.
Data inputed is concatenated in a few bytes and broadcasted to a private LORA network via a dongle plugged to the worker's tablet.
Because tablets are protected by a casing, the design had to be minimalistic with bigger buttons than normal. The challenging part was the interaction with the dongles and the LORA network, as well as the switch between the different connectivities upon availability (LORA / WiFi).
The applications were deployed privately so I don't have links to share for it.


  • Android
  • IOT


Get in touch_

Or just write me a letter here_