Dan Avramescu, Developer in Paris, France
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Dan Avramescu

Verified Expert  in Engineering

Full-stack Developer

Paris, France
Toptal Member Since
October 20, 2020

Dan is a full-stack web developer with a passion for technology, and since 2008, he's been building web projects as a consultant and freelance. He's developed several projects while leading internationally remote technical teams and co-founded and ran an online startup for two years. Dan's expertise includes various languages (JavaScript, PHP, and HTML), libraries/APIs (React and Node.js), platforms (WordPress), site speed optimization, among others.


Toptal Clients
React, Node.js, MongoDB, PostgreSQL, CSS, HTML, Heroku, Git, Compass, Postman...
Freelance Work
Google SEO, Socket.IO, Site Speed Optimization, Git, JSON, Web Services, CSS...
PHP, SCSS, CSS, HTML, JavaScript, Node.js, Twilio, Telegram Bots, Discord...




Preferred Environment

Socket.IO, Visual Studio Code (VS Code), CSS, PHP, React Redux, Node.js, React, JavaScript, Postman, PhpStorm

The most amazing...

...thing I've built was my startup. I created all the code, grew the team (from two to eight people), and saw the revenue increase from 0 to $600,000 in 18 months.

Work Experience

Senior Full-stack Engineer

2020 - PRESENT
Toptal Clients
  • Refactored a supply chain application MVP into a scalable and maintainable project (reduced code duplication, moved the app logic from the front end into the back end, paginated huge data queries, defined and implemented coding standards).
  • Monitored and helped a team of five developers implement the new coding standards through code reviews and daily meetings.
  • Designed the architecture and created a second supply chain application meant to serve many users who need to perform complex operations from inventory management to managing orders internally and externally to their clients.
  • Participated in improving an app that offers an online theatrical experience with interactive participation of the viewers. My task was to ensure that certain visual and audio tracks synchronize for all users despite their location and show start time.
Technologies: React, Node.js, MongoDB, PostgreSQL, CSS, HTML, Heroku, Git, Compass, Postman, JavaScript

Senior Web Developer

2014 - PRESENT
Freelance Work
  • Developed and maintained a large number of websites and web applications while working extensively with publishers to create a great web experience for their readers and to give them a technical edge in acquiring SEO traffic.
  • Helped my clients to go from a few thousand to 400,000 visitors per month while their sites were under my technical supervision and maintenance.
  • Kept my clients' sites up to date with the new developments in web requirements (site speed, technical SEO, and visual design trends).
  • Developed and maintained more than 25 web projects.
  • Integrated various web services: content/product feeds, automatic SMS notification/authentication services, real-time communication between clients, and server using Socket.IO/polling.
Technologies: Google SEO, Socket.IO, Site Speed Optimization, Git, JSON, Web Services, CSS, HTML, WordPress, Drupal, Node.js, React, JavaScript, React Redux, REST APIs, PhpStorm, Postman, Operating Systems, XML Web Services, SCSS, jQuery


2017 - 2020
  • Created a startup together with a business partner in the financial products sphere.
  • Coordinated the team and grew it from two to eight people while having both technical and non-technical employees.
  • Created and maintained the code for our community website and integrated various services into it using the Telegram Bot API, Discord Bots API, Twilio, Zendesk, Mailchimp, and so on.
  • Wore all the hats in the company, from technical development, HR responsibilities, partner relationships to creating and coordinating the marketing campaigns, and managing our finances.
Technologies: PHP, SCSS, CSS, HTML, JavaScript, Node.js, Twilio, Telegram Bots, Discord, Google Tag Manager API, Google Analytics API, Tracking, Zendesk API, PhpStorm, Postman, XML Web Services, jQuery

Senior Web Development Consultant

2014 - 2017
  • Stepped up to working as a consultant within top tier French companies and French government institutes.
  • Integrated the front-end landing pages with high conversion rates for a Drupal 7 application. The client was Cellfish Media, a fast-paced mobile online marketing company.
  • Led a team of developers to create the front-end themes and the back end of two government websites in Drupal 7.
  • Served as the lead developer for a startup financed by Engie called Green Channel—integrating clients via Salesforce and creating the front-end theme in a Drupal 7 application.
Technologies: Gulp, Stylus, SCSS, CSS, HTML, JavaScript, PHP, Drupal, Affiliate Tracking, PhpStorm, Postman, XML Web Services, jQuery

Web Development Consultant

2013 - 2014
  • Trained my colleagues in Drupal 7 and taught them the differences between Drupal 6 and 7.
  • Worked as a consultant while being based in Paris.
  • Maintained 2 Drupal applications for clients in Paris.
Technologies: CSS, HTML, JavaScript, PHP, Full-stack, PhpStorm, XML Web Services, SCSS, jQuery

Web Developer

2012 - 2013
  • Maintained and evolved several client websites in Drupal 6/7 and Joomla.
  • Tracked and fixed bugs in Redmine and Jira and created workflows for client feedback and bug resolution.
  • Participated in client briefs, contract negotiation, requirements analysis, and offer creation.
Technologies: Joomla, Drupal 7, Drupal 6, CSS, HTML, JavaScript, PHP, Full-stack, XML Web Services, jQuery

Web Developer

2008 - 2010
  • Developed two websites in Drupal 6 for a steel company and a news outlet in Belgium.
  • Created the themes that adhered to Drupal 6 standards at that time.
  • Integrated a web service that sent and received XML data. This was 2008, so quite complex for its time.
Technologies: Drupal 6, HTML, CSS, JavaScript, PHP, Full-stack, XML Web Services, jQuery

Grapevine ERP App

A React/Node.js/MongoDB-based app that allows companies to manage their stocks across multiple warehouses, add and manage client contacts, and create internal and external orders with several payment types.

React Administration UI and JavaScript Show Runner for Online Theatrical Experiences

AnyOneThing creates online theatrical experiences that often get the viewer to participate in the play through his microphone and/or camera. I was tasked with creating an administrative UI with React, which interfaces the back-end API (written in Ruby on Rails) and facilitates administrators to edit the sequences of scenes and theatrical cues (videos, audios, images, and sounds).

Moreover, I created a box office application (also in React) and optimized and evolved the showrunner to work across browsers and offer a better overall experience.


I was part of a two-founder team of Tradunity: a bootstrapped startup. Our goal was to help beginner traders find success in the financial markets.

I was responsible for technical development and leading the technical team as we grew. I also created the original app and integrated it with all the vital services we needed to create a thriving community.

As our team grew to eight people, so did my responsibilities. We created and executed a very efficient product and promotion strategy, which led to great results. Tradunity has turned a profit from the first month up until the beginning of 2020. The project was closed at the beginning of 2020.

ClassRoomQ | Node.js and React App

ClassRoomQ is a Node.js and React app that allows students and teachers in virtual classrooms to interact with each other in a structured way. There were two authorization levels. The authentication had to be done through a middleware that could identify users who were already logged in to a WordPress application. The Node.js and React interaction was done through WebSockets rather than an API to facilitate the two-way interaction between authenticated and anonymous users.
2010 - 2012

Master's Degree in Computer Science

Technical University of Delft - Delft, The Netherlands

2006 - 2010

Bachelor's Degree in Computer Science

Politechnics University of Bucharest - Bucharest, Romania


React, Node.js, jQuery, REST APIs, React Redux, Telegram Messenger API, Socket.IO, Telegram Bot API, Twilio API, Antd, Google Tag Manager API, Google Analytics API, Zendesk API


Git, PhpStorm, JSX, Postman, Google Analytics, Stylus, Gulp, Subversion (SVN), Mailchimp, LearnDash


JavaScript, PHP, CSS, HTML, C, C++, SCSS


WordPress, Visual Studio Code (VS Code), Drupal 6, Drupal 7, Joomla, Drupal, Zendesk, Twilio, Heroku


JSON, MongoDB, MySQL, PostgreSQL


Waterfall Development


Redux, Express.js, Compass


Site Speed Optimization, Full-stack, Back-end, Front-end, Web Services, Google SEO, APIs, Axios, Operating Systems, XML Web Services, UML Diagrams, Wireless Sensor Networks, Discord Bots, Affiliate Tracking, Google Tag Manager, Computer Science, WebSockets, EMCAScript (ES), Telegram Bots, Discord, Tracking

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