Julien Brancher, Developer in Paris, France
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Julien Brancher

Verified Expert  in Engineering

Full-stack Developer

Paris, France
Toptal Member Since
September 14, 2022

Julien is a full-stack developer specializing in web technologies with experience designing, implementing, testing, refactoring, and maintaining advanced web applications. Passionate about designing complex systems to answer business needs in the most effective, reliable, and secure way, he is attentive to standards compliance, cleanliness of the source code, ergonomics, semantics, accessibility, and scalability. Julien is eager to take on new challenges and work on cutting-edge technologies.


Vue, PHP, PostgreSQL, APIs, NGINX, Ubuntu, Payment Gateways...
Bash, Git, Debian Packaging, Common Lisp (CL), NGINX, PostgreSQL, DevOps...
PHP, Vue, MySQL, Bootstrap, Linux, D3.js, SVG, HTML5, CSS3, RequireJS, Git...




Preferred Environment

Common Lisp (CL), Vue, PHP, Ubuntu, Linux, PostgreSQL, NGINX, Sass, Software Architecture, Progressive Web Applications (PWA)

The most amazing...

...app I've developed is Ferryroute, a website and mobile application selling ferry tickets from 42 European companies.

Work Experience

Software Architect | System Administrator | Full-stack Developer

2021 - PRESENT
  • Built the Ferryroute web application for an online travel agency selling ferry tickets across Europe.
  • Implemented a framework with a resource system as its foundation.
  • Developed a Google Maps interface for users to select their trip destinations.
Technologies: Vue, PHP, PostgreSQL, APIs, NGINX, Ubuntu, Payment Gateways, Search Engine Optimization (SEO), Google Maps, Google Tag Manager, Linux, Vuetify, Quasar, FFmpeg, ImageMagick, CSS3, HTML5, Webpack, Git, Composer, Bash, SSL Certificates, REST, DevOps, JavaScript, CSS, Hybrid Apps, Software Architecture, Architecture, PWA, HTML, Full-stack, REST APIs, eCommerce, Front-end, Back-end, User Interface (UI), User Experience (UX), Maps, CTO, Solution Architecture


2020 - PRESENT
  • Worked on a web development framework based on the Common Lisp language and PostgreSQL database.
  • Built a custom shell based on Bash with autocomplete ability, documentation generation, and an important set of functions.
  • Automated the creation of Debian packages, targeting the development environment and online servers.
Technologies: Bash, Git, Debian Packaging, Common Lisp (CL), NGINX, PostgreSQL, DevOps, Software Architecture, Architecture, Full-stack, REST APIs, Functional Programming, CEO, Docker, Solution Architecture, Technical Writing

Lead Full-stack Developer

2017 - 2020
  • Provided support to the web development team on key system components like payment gateways, code and query optimization, security compliance, and Linux server administration.
  • Developed a framework on top of Vue to be one day used as the foundation of the new system supporting the client applications.
  • Implemented a custom WebQL-like SQL language to support the report application, allowing it to perform complex filtering across multiple database tables.
  • Implemented a comprehensive email system to send messages via multiple APIs.
Technologies: PHP, Vue, MySQL, Bootstrap, Linux, D3.js, SVG, HTML5, CSS3, RequireJS, Git, Composer, JavaScript, CSS, Software Architecture, Architecture, Frameworks, HTML, Full-stack, REST APIs, Front-end, Back-end, User Interface (UI), User Experience (UX), AWS Lambda, Solution Architecture

Senior Full-stack Developer

2014 - 2015
  • Improved the embedded authentication system found on most Peugeot and Citroën cars.
  • Developed a hardware monitoring system to maintain custom computers used by official shops.
  • Participated in the customization of a Linux kernel and the operating system.
Technologies: PHP, OAuth 2, Zend Engine, HTML5, CSS3, Zabbix, GLPI, Subversion (SVN), JavaScript, CSS, HTML


2012 - 2013
  • Conceived an innovative XML/XSL data format used by manufacturers to publish their products in our B2B marketplace.
  • Developed a custom PHP framework inspired by Symfony and Laravel.
  • Participated in the elaboration of the business plan.
Technologies: PHP, MySQL, JavaScript, Front-end, Back-end, Memcached, FTP, HTML, CSS, jQuery, Subversion (SVN), Bash, Laravel, Symfony, Technical Writing, API Design

Senior Full-stack Developer

2010 - 2012
Bright Network
  • Designed and developed a system to match job offers with candidates.
  • Developed a database visualization tool displaying data across graphs.
  • Managed the database migration from MySQL to PostgreSQL using different table structures.
Technologies: PHP, SVG, Bash, PostgreSQL, HTML5, CSS3, Amazon Web Services (AWS), JavaScript, CSS, HTML, Full-stack, Front-end, Back-end

Full-stack Developer

2009 - 2010
  • Improved the existing process management system dealing with importing data coming from resellers.
  • Implemented a Google Maps interface to help clients find the best garage to install their tires.
  • Worked on different interface components to improve sales conversion rate.
Technologies: PHP, JavaScript, MySQL, Subversion (SVN), Memcached, CSS, Google Maps, HTML, Full-stack, eCommerce, Front-end, Back-end


2008 - 2009
  • Developed a PHP framework inspired by Doctrine, Symfony, and Zend Framework.
  • Developed several websites for a communication agency.
  • Provided consulting services around web technologies.
Technologies: PHP, MySQL, JavaScript, jQuery, Front-end, Back-end, Doctrine, Zend Framework, Full-stack, Symfony


Ferryroute is a website and mobile application selling ferry tickets from 42 European companies. The application is already available on the Google Play Store and will eventually be released on the iOS App Store.

I designed, implemented, and deployed the whole system. On the back end, I implemented a custom framework, a resource system inspired by data-driven development, sourcing the data from different APIs. On the front end, I built a framework on top of Vue, allowing fast implementation of new functionalities and pages.

Foxbee Shell

A tool I designed after years of experience in server maintenance. A custom shell built on top of Bash and a framework to build amazing scripts for servers. Includes automatic Pandoc documentation, command line auto-completion, text formatting (colors, style, icons, and tables), and a Debian package builder.

Foxbee Compiler

What I feel should be the right way to write code, a modern language I implemented built on top of Common Lisp and its associated interface, dedicated to website development in a serverless infrastructure. An attempt to bring a new programming paradigm to the market!

Report Application

Developed the entire application, including the back end in PHP/MySQL and the front end in Vue.js. A data-driven reporting application with dynamic forms and graphs, including a timeline, a histogram, a pie chart, and a data table, all with interactive, highlight, grouping, ordering, and filtering capabilities and the ability to display records on a map too.
Implemented a custom WebQL-like SQL language to support the report application using prepared statements to avoid any SQL injections.

Project Management Application

Developed the entire application: the back end in PHP/MySQL and the front end in Vue.js. The main screen is a Gantt chart where we can add and edit tasks with simple drag and drop. The system recognizes managers and people assigned to tasks across multiple projects and avoids time overlaps. It also takes into account weekends and bank holidays, so the duration of a task is known on both business days and regular days.

Order Monitor Application

The Order Monitor is a Vue.js application for restaurants to track their online orders, from pending to delivered. It takes into account client specificities and includes grouping, ordering, and filtering functionalities.


PHP, Bash, JavaScript, HTML5, CSS3, CSS, HTML, Bash Script, Common Lisp (CL), Sass, C++, C, Java, MathML, SCSS


Vue, Google Maps, Vue 2, ImageMagick, D3.js, REST APIs, FFmpeg, RequireJS, jQuery, Doctrine, Node.js, Vuex, JSON API


REST, Search Engine Optimization (SEO), DevOps, Functional Programming, Serverless Architecture


Software Architecture, Frameworks, PWA, Full-stack, Web & Mobile Applications, Mobile App Development, Architecture, Maps, Progressive Web Applications (PWA), APIs, SVG, Payment Gateways, SSL Certificates, Debian Packaging, English, Hybrid Apps, SSH, SSL, Terminal Servers, eCommerce, Front-end, Back-end, IT Project Management, Google Tag Manager, Chemistry, Physics, Mathematics, Doxygen, Serverless, User Interface (UI), User Experience (UX), Symphony, FTP, Vue-router, Mobile First, Mobile-first Design, Back-office System Development, CTO, CEO, JSON REST APIs, Solution Architecture, API Design, Technical Writing, Pandoc


Vuetify, OAuth 2, Zend Engine, Quasar, Bootstrap, Serverless Framework, Laravel, Zend Framework, Symfony


NGINX, Webpack, Zabbix, GLPI, Subversion (SVN), Git, Composer, Adobe Experience Design (XD), Zeplin, Vue CLI, NPM, GeoNames


Ubuntu, Linux, Amazon Web Services (AWS), Docker, Android, iOS, AWS Lambda


PostgreSQL, MySQL, Memcached, JSON

2005 - 2010

Master of Science Degree in Software Engineering

Graduate School of Computer Engineering (ESGI) - Paris, France

2003 - 2005

Diploma in Mathematics and Computer Science

High School Sainte-Thérèse - Rambouillet, France


Test of English for International Communication (TOEIC)

ETS Global