Freelancer profile translated to English.
Back to original languageAbout Xavier
Senior Software Engineer & Feature Lead | Node.js | TypeScript | Web scraping | Custom Automation
Senior software engineer with over 10 years of experience, I design and develop robust, maintainable, and scalable backend applications.
Currently Feature Lead, I manage end-to-end functional scopes: technical definition, architecture, development, code review, and team support.
I place particular importance on code quality, best practices (SOLID, clean architecture, tests), and knowledge sharing.
My core business:
→ Backend architecture and development
→ API design, data modeling, system integration
→ Technical leadership and team skill development
What sets me apart
I'm not just an executor: I challenge requirements, propose pragmatic solutions, and deliver code designed to last – whether it's to strengthen your team on a structuring project or, for example, for a one-off data extraction mission.
Complementary Expertise: Web Scraping & Automation
Are you wasting time on repetitive tasks or need to build a database from web sources? I develop custom bots, adapted to each site (authentication, complex navigation...).
Frequent use cases:
- Extraction of qualified leads from professional directories
- Multi-site price monitoring (e-commerce, real estate, automotive)
- Collection of customer reviews & data enrichment via APIs
My approach:
I develop custom bots, adapted to the structure of each site: handling authentication, complex navigation, pagination, infinite scroll, dynamic filters.
Deliverable in the format of your choice: JSON, CSV, or direct integration
Stack: Node.js · TypeScript · NestJS · GraphQL · MongoDB · ElasticSearch · Puppeteer · Playwright · React
French
Native or bilingual
English
Native or bilingual
Can work on-site
Paris (up to 50km), Paris (up to 100km), Nancy (up to 100km), Strasbourg (up to 100km)
Experience
- Cars & Go
On Malt
Automatic detection and addition to cart of new vehicles available on car brand websites.May 2021 - May 2021 (1 month)Nancy, FranceAs part of the online search for second-hand vehicles at attractive prices for a car dealership, I developed and implemented a desktop application via Electron, enabling the automation of the search/detection/add to cart of new vehicles available on the relevant sites, meeting the criteria defined by the user, with an email notification system to the user. - ShineAutomation of complex form entries on InfogreffeJune 2020 - June 2020Nancy, FranceDevelopment of a "headless browser" bot to automate the entry of several consecutive pages of forms, which are more or less complex.The particularity of the automation in this mission is the degree of complexity generated by the type of action to be automated on the forms in order to correctly trigger clicks and other HTML events.
- REGMReal estate agent dataApril 2021 - April 2021Paris, FranceAs part of a phone/mailing campaign, we identified about thirty real estate agent directory sites from which I automated the extraction of lead lists containing, among other things, phone numbers, email addresses, and contact names.Then, the data from the 20-30 sites were standardized, cleaned, and deduplicated, to provide the client with an Excel file of leads per targeted site. A total of 34K leads.
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Education
- Bac STI ElectronicsLycée Henry Loritz, Nancy2001* Etudes, conception et réalisation de circuits électroniques * Électrocinétique * Logique booléenne * Programmation micro-contrôleurs (assembleur)
- BTS Industrial ComputingLycée Henry Loritz, Nancy2003* Conception de logiciels d’automatisation des chaînes de production * Programmation de logiciels d’automatisation des tâches * Tests et simulations pour validation du bon fonctionnement du hardware * Installation des programmes et rédactions des modes d’emploi Languages: * C, C++ * Assembleur (DOC, MacOS) * Visual Basic * Visual C++
Certifications
- Cisco CCNAGlobal Knowledge Training2007