Nicolas Zozol, Developer in Toulouse, France
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Nicolas Zozol

Verified Expert  in Engineering

Software Design Developer

Toulouse, France
Toptal Member Since
July 19, 2019

Nicolas is a software designer and coder. He's worked with small startups and big companies where he likes to understand needs, uses his knowledge to simplify technical hassles, and designs the software that will help your business. Nicolas codes mainly with Java and JavaScript, but he is very versatile with other languages. Nicolas coded a few trading bots for cryptocurrencies, and he is learning Solidity to become a CTO or team leader in this industry.


Robusta Code
SQL, PostgreSQL, Domain-driven Design (DDD), Microservices, Stripe API...
Boston Consulting Group
Java, E2E Testing, Software Design, Amazon Web Services (AWS), Agile, CSS
Groupe Renault
SQL, PostgreSQL, Domain-driven Design (DDD), CQRS, React, IT Projects...




Preferred Environment

React, JavaScript, Java, IntelliJ IDEA, Linux, Blockchain

The most amazing...

...thing I've made was the open source project Masala Parser. I had clients early with it, but it took us 3 years to deliver the best quality for the community.

Work Experience


2013 - PRESENT
Robusta Code
  • Developed a web platform connecting great products to influencers having an ethic in a Lean Canvas startup process.
  • Connected the web platform with Stripe for basic eCommerce features.
  • Created the website, using Next.js and styled components, having 100% on Lighthouse.
  • Created an eCommerce site for the dental industry using Thelia, a very customizable eCommerce platform based on Symfony.
  • Built a crypto trading bot using CCXT with arbitrage across multiple exchanges and order book depth strategies.
Technologies: SQL, PostgreSQL, Domain-driven Design (DDD), Microservices, Stripe API, eCommerce, Stripe, Symfony, Java, React Native, Blockchain, Next.js, Scrum Master, Solidity

Senior Full-stack Developer

2019 - 2020
Boston Consulting Group
  • Contributed to the development of a very large and customizable Java CMS for the BCG public site.
  • Provided data extraction support for the machine learning team.
  • Added a good coverage of E2E automated testing with WebdriverIO.
  • Designed a REST API restructuring data from CMS internals consumed by AWS services.
  • Worked on the scalability of the CMS using cache strategies with Elasticsearch.
Technologies: Java, E2E Testing, Software Design, Amazon Web Services (AWS), Agile, CSS

Software Designer and Coder

2019 - 2020
Groupe Renault
  • Designed the architectural system that fits the client's needs.
  • Created a CQRS/event sourcing processor with Node.js.
  • Created a full React interface using light dependencies.
  • Helped the team learn how to use a test-driven design approach.
  • Trained and managed junior staff providing confidence and implementing good practices with an agile practice.
Technologies: SQL, PostgreSQL, Domain-driven Design (DDD), CQRS, React, IT Projects, Architecture, E2E Testing, Software Design, Amazon Web Services (AWS), Agile, MySQL, Test-driven Development (TDD), Redux, Node.js, TypeScript

Python Developer

2019 - 2019
IOT Valley
  • Created a React UI displaying device alerts on a dashboard.
  • Designed UX for construction workers on-site, with strong constraints on the ergonomy.
  • Worked on the Django/Python back end to scale correctly a system listening to IoT events sent by thousands of devices.
  • Had great productivity with Django framework, using views and serializers.
Technologies: Agile, MySQL, Django, Python


2018 - 2019
Neo Funeraire
  • Defined the client's needs for this small startup.
  • Created a dedicated microservice for invoice printing with Spring Boot.
  • Deployed microservices to AWS inside a Docker container.
  • Created a graveyard customizer with Angular and canvas with Fabric.js.
  • Deployed a RESTful API in PHP and created an Angular client application.
Technologies: Microservices, JavaScript, Java, IT Projects, Architecture, Software Design, Amazon Web Services (AWS), HTML5, PHP, Docker


2015 - 2019
Masala Parser
  • Created a parser combinator generator, inspired by Haskell's Parsec library.
  • Maintained from the start of the project a 100% line coverage with automated unit tests.
  • Started to grow a community for this open-source project, explaining the goals and benefits of the library.
  • Worked with enterprise clients and open source contributors interested by either replacing complex regex or creating customized parsers.
  • Designed an API that is understandable by most developers, optionally typed with TypeScript.
Technologies: JavaScript, IT Projects, Software Design, Test-driven Development (TDD)

Solidity Developer

2018 - 2018
Vuca Strategy
  • Prepared definition of needs in the agriculture market, describing how tracking with a blockchain could limit the use of pesticides.
  • Created a basic but working proof of concept (POC) with IBM Hyperledger despite very limited documentation. The code was written with Solidity.
  • Wrote a report about the relevance of the solution.
Technologies: Blockchain, Hyperledger, Solidity

React Native Developer

2018 - 2018
Robusta Code
  • Created a mobile app with React Native. The application was able to take quick notes on-site then the user could edit them more clearly on their desktop back at the office.
  • Used suitable architecture for both mobile and web apps connected to Firebase.
  • Tracked the app's launching on Android and iOS, with a similar design.
Technologies: Redux, Firebase, React Native

Trainer and Curriculum Designer

2015 - 2018
  • Designed a software curriculum for young scientists whose specialty was not in employment market preferences.
  • Screened candidates with the good qualities for intensive training.
  • Gave Java and JavaScript training for each three-month sessions.
  • Helped more than 100 trainees to find their jobs in IT market.
  • Grew up the talent factory to parallelize up to three sessions.
Technologies: JavaScript, Java, Spring Boot, Symfony, HTML5, PHP, UML

Front-end Developer

2014 - 2014
  • Led the front-end team of a modular dashboard customizer written in AngularJS with TypeScript.
  • Used Highcharts and basic D3.js intensively for data visualization inside the dashboard.
  • Pushed an AngularJS API to the limit, with some performance optimizations on different web platforms.
  • Created a drag-and-drop text and image editor integrated into the dashboard.
  • Simplified the UX of this huge dashboard, by adding clever behavior to some buttons/dropdown.
Technologies: Microservices, D3.js, Java, Agile, Spring Boot, HTML5, AngularJS, Scrum Master

Lead Developer

2011 - 2012
  • Led a team of five people in a fast-growing company.
  • Worked with Titanium, Android, and iOS to create a mobile application for clients including Airbus.
  • Designed back-end APIs for mobile applications using mainly Java EE, but also Symfony and Node.js.
  • Trained people across France with UML, design patterns, Java, and Backbone.js.
  • Brought some (at the time) modern tools to the team such as WebRTC, Three.js, Git, and JavaScript modules.
Technologies: JavaScript, Java, Architecture, Software Design, Symfony, MySQL, HTML5, Test-driven Development (TDD), PHP, iOS


2009 - 2011
Akka Technologies
  • Migrated an old Struts application to GWT with Ajax benefits.
  • Designed applications with Airbus or EDF client using UML or Balsamiq mockups.
  • Used JavaScript modern frameworks (at that time) such as Ext JS.
  • Trained teams to GWT.
Technologies: JavaScript, Java, MySQL, GWT

Boston Consulting Group
The website contains 10,000 publications and 50 different content types. We used the Brightspot CMS framework which is totally customizable and Java.
I contributed as a full-stack developer to the CMS of Boston Consulting Group and some of my main responsibilities included API creation, data extraction support for the machine learning team, and E2E automated testing with WebdriverIO.

Masala Project
Masala Parser is a framework for creating your own dedicated parser. You can parse a date, an airplane ticket, anything special in your business.
It's a JavaScript implementation of the Haskell Parsec. It is plain JavaScript that works in the browser, tested with more than 450 unit tests, covering 100% of code lines.

Neo Funeraire
I was the CTO for this small startup—decided part of the used technologies and followed the project for almost two years.
The CEO had low technical skills, therefore I had to translate his thoughts in technology while defining a possible schedule and fitting a low budget.

A social network for travelers. I used Masala Parser to retrieve travel information inside emails and worked in the Angular application.

Dockdoku PLM
Dockdoku PLM is an open-source PLM project bringing product information in web or even iPad inside the production sites, adding speed for some processes.

This offline mobile app enables construction architects to manage building issues and communicate with different teams of craftsmen on these issues.

Thelia eCommerce Platform
The Thelia eCommerce site was designed for the dental industry, following each step of a dental quote process.
Designed for a startup, the product, unfortunately, didn't survive in the market. I worked with CQFdev, a strong eCommerce agency in Toulouse.


An IoT startup tracking constructor business to prevent theft of tools.
The back end was built on Django with PostgreSQL and Elasticsearch. Communication was made to Sigfox or Lora network. The tools were authorized to work during some periods and inside an area, sending alerts if they were vibrating outside of these rules.
2000 - 2002

French National Education Contest in Physics and Chemistry

IUFM de Marseille - Marseille, France

2000 - 2002

Bachelor's Degree in Computer Sciences

Université de Marseille - Marseille, France

1995 - 1998

Bachelor's Degree in Physics and Chemistry

Université de Paris VI - Paris, France


Oracle Certified Master, Java SE6 Developer



Sun Certified Java Programmer



React, Node.js, Stripe, Vue, D3.js, Stripe API


JHipster, IntelliJ IDEA


Symfony 4, Angular, Redux, Symfony, Spring Boot, GWT, AngularJS, Ionic, React Native, Thelia, Django, Next.js


Test-driven Development (TDD), Agile, E2E Testing, Microservices, CQRS


Java, JavaScript, PHP, HTML5, Sass, TypeScript, Python, UML, CSS, HTML, SQL, Python 3, Solidity


Linux, iOS, Firebase, Amazon Web Services (AWS), Docker, Blockchain, Hyperledger


PostgreSQL, MySQL, MongoDB


Web Development, APIs, Software Design, Architecture, Gatsby, IT Projects, CTO, Parsers, eCommerce, Internet of Things (IoT), Domain-driven Design (DDD), Science, Scrum Master

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