Guillaume Faas
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Guillaume Faas Email & Phone Number

Senior .Net Developer Advocate | Speaker | Coach | Mentor at Vonage
Location: Algrange, Grand Est, France 19 work roles 3 schools
1 work email found @vonage.com 1 phone found area 360 LinkedIn matched
✓ Verified July 2026 4 data sources Profile completeness 100%

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Work email g****@vonage.com
Direct phone (360) ***-****
LinkedIn Profile matched
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Current company
Role
Senior .Net Developer Advocate | Speaker | Coach | Mentor
Location
Algrange, Grand Est, France
Company size

Who is Guillaume Faas? Overview

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Quick answer

Guillaume Faas is listed as Senior .Net Developer Advocate | Speaker | Coach | Mentor at Vonage, a with 2730 employees, based in Algrange, Grand Est, France. AeroLeads shows a work email signal at vonage.com, phone signal with area code 360, and a matched LinkedIn profile for Guillaume Faas.

Guillaume Faas previously worked as Senior .Net Developer Advocate at Vonage and Mentor at Codementor. Guillaume Faas holds Supinfo Expert, Information Technology from Supinfo.

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{first}.{last}@vonage.com
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Profile bio

About Guillaume Faas

Building software has always been a passion of mine. This is still true after almost 15 years of experience in various environments and business sectors. I've never really considered it work but "problems to solve". Yes, I love puzzles or anything that requires you to turn your head around.Passion also means curiosity and hunger for knowledge. I regularly read blogs, articles, and books and practice katas by myself. Some of my favourite authors are Mark Seemann, Kent Beck, and Saleem Siddiqui. Continuous improvement is a mindset I consider essential.If I had to pick one priority when building a product, I would choose quality. This has always been what I put first. I'm not satisfied when "It Works", it must also be done well. I always tried to improve the team I joined wherever I've been. Whether by providing experience, a fresh eye, ideas, or mentoring younger peers. About mentoring, sharing knowledge represents a key aspect of my participation in a team. I do believe that knowledge is useless if you keep it to yourself. We need to use our knowledge to teach and inspire others, the same way others have inspired us.Putting this all together, it’s quite clear I advocate Software Craftsmanship. Hearing about this ideology for the first time has been one of the biggest milestones in my career. It is the perfect match for what I consider important in terms of mindset. Since then, I’ve continuously tried to spread the ideology by sharing ideas and methodologies.Feel free to take a look at my GitHub account: https://github.com/Tr00dYou'll find katas I do for fun or coaching purposes, but you'll mostly see how I code.Finally, with my friend Yoan Thirion, we are presenting our new workshop "Xtrem TDD" at a few conferences in 2022:- June 30th and July 1st: Agi'Lille Conference (France)- July 6th: Tech Excellence Meetup (Online)- September 8th & 9th: XP Days Benelux (Luxembourg)

Listed skills include .Net, C#, Vb.Net, Windows Phone, and 36 others.

Current workplace

Guillaume Faas's current company

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Vonage
Vonage
Senior .Net Developer Advocate | Speaker | Coach | Mentor
Algrange, FR
Website
Employees
2730
AeroLeads page
19 roles · 19 years

Guillaume Faas work experience

A career timeline built from the work history available for this profile.

Role listed

Algrange, Fr

Senior .Net Developer Advocate

Current

Holmdel, New Jersey, Us

Sep 2022 - Present

Mentor

Current

Palo Alto, California, Us

https://www.codementor.io/@tr00d

Oct 2023 - Present

Content Creator / Official Trainer & Speaker

Current

* XtremTDD is a collection of resources (content, workshops, katas) to help developers improve their craft and learn new practices and tools. We want to spread XP / Craftsmanship values and make people realize how important it is to be proud of their work. TDD is our baseline, but we use it to bring other topics to the table, such as Mutation Testing, Property-Based Testing, Functional Programming (Immutability, Monads, Transparency, Railway Programming), Example Mapping, Clean Architecture, etc.Implementing our XtremTDD workshop on various languages (C#, Java, Scala), along with its step-by-step guide. The content is open-source and available on GitHub: https://github.com/les-tontons-crafters/xtrem-tdd-money-kata.Writing articles on various topics for our Craft Companion (or knowledge base). The website is available here: https://xtrem-tdd.netlify.app/. The content is also open-source and available on GitHub: https://github.com/les-tontons-crafters/xtrem-tdd.Coaching participants on various setups (online summer camp, onsite workshop, user groups).Spreading our ideas and values at conferences.

Mar 2022 - Present

Technical Coach (For Squaremiled)

Luxembourg-Hamm, Lu

* Mission as Technical Coach for SquaremiledTailored technical coaching to upskill a team on various topics such as domain-centric architectures and Continuous Integration.Technical environment: C#, .NET 6, Hexagonal / Onion / Clean Architecture, DDD / CQRS, ATDD / TDD, Git, Continuous Integration (Trunk-based Development, Feature Flags, Automated Pipelines), Specflow

Aug 2022 - Sep 2022

Technical Coach (For Squaremiled)

Chiyoda-Ku, Tokyo, Jp

* Mission as Technical Coach for SquaremiledTailored technical coaching to help a team improve the sustainability and delivery of their products.Technical environment: C#, .NET 6, ATDD / TDD, Specflow

May 2022 - Sep 2022

Software Craftsmanship Leader / Technical Coach / .Net Expert

Peppange, Luxembourg, Lu

Bringing awareness to our clients about the importance of our Craft and our values.Coaching internal teams.Organizing a series of workshops in Luxembourg with international speakers to help participants learn, improve and share knowledge.

Jan 2022 - Sep 2022

.Net Expert / Software Craftsman

Peppange, Luxembourg, Lu

Providing a set of internal workshops and training about Software Craftsmanship.

Oct 2020 - Jan 2022

Lead Developer / Technical Coach (For Squaremiled)

Luxembourg, Luxembourg, Lu

* Mission as Lead Developer for SquaremiledLead developer on SkillsExpander, a worldwide cloud-native upskilling portal, for a team of up to 13 developers.Assuring quality and stability on each delivery through a common adoption of coding practices.Training of team members on various topics such as TDD, clean code, and other best practices and patterns. Implementation of a blueprint solution helping developers to transition to the .Net ecosystem, as well as providing individual training and coaching.Participation in the evolution of a global collaboration platform.Technical environment: C#, .NET 3.1 / .NET 6, Clean Architecture, DDD / CQRS / ES, ATDD / TDD, Identity Server 4, Azure AD/B2C, Azure API Management, React, Redis, Azure Service Bus, Azure CosmoDB, MongoDb, Azure SQL Server, Azure DevOps, Azure Platform, Git / Trunk-based Development, Powershell, YAML, SonarQube

Nov 2020 - Sep 2022

Software Development Engineer

Bertrange, Lu

Technical Lead and Scrum Master for the Calculation Engine team.Evolution and maintenance of the product on key features (transaction costs, ongoing charges, and composite benchmarks).Defining technical guidelines and strategies which led to a great improvement in our code metrics (code smells, duplication, unit testing and coverage).Creating and driving an internal .Net Backend Community for providing help across teams and resolving common problematics.Technical environment: .Net/.Net Core, C#, ASP.Net Api, Micro-services, Entity Framework, Oracle Database, Agile (Scrum), Git/GitLab, Atlassian (Jira, Confluence), Sonarqube

Dec 2018 - Oct 2020

Software Architect - Technical Lead

Bertrange, Lu

Providing technical leadership to the team and defining a technical roadmap for short/middle-term vision.Involved in the company's strategy for new business opportunities and internal growth.Defining technical guidelines (Branching strategy, coding guidelines, OOP principles, design patterns), and providing team weekly training on these key topics.Implementation of an Azure Infrastructure in order to add up cloud services (externalized data, cognitive services) to our solutions.Implementation of continuous integration/deployment pipelines (whenever possible) using TFS.Migration of all internal environments (TFS, SQL, VS, NuGet).Responsible for defining technical profiles and technical interviews.Technical environment : .Net Framework, C#, WPF/MVVM, ASP.Net MVC/Api, Entity Framework, Javascript/JQuery, Bootstrap, TFS, Azure (Administration, Api, Cognitive Services), Telerik (ASP.Net), Infragisticts (Desktop), SQL Server

Mar 2018 - Nov 2018

Analyst Developer

Windhof, Lu

Mar 2017 - Feb 2018

Senior .Net Consultant (For Ainos)

Luxembourg, Lu

* Mission as Senior .Net Consultant for Ainos.Supporting the Dev department on the day-to-day business regarding the development and maintenance of internal applications.Implementation of the new Regulatory Library application, composed of Sites/Apis.Implementation of the new Build/Release Management process on TFS using the WinRM protocol.Technical environment: .Net Framework, C#, ASP.Net MVC, Entity Framework, Bootstrap, Team Foundation Server, Telerik (ASP.Net), SQL Server, WebServices, SSIS, WPF, Agile (SCRUM).

Mar 2017 - Feb 2018

Software Engineer

Bertrange, Lu

Implementation of .Net solutions for various business sectors (HealthCare, Finance, Mobility, etc.). I was involved in every step of the process (specifications/estimations, architecture, development, testing, deployment and training).Drafting a Programming Convention in order to standardize our coding process, and initiating a code-review process.Responsible for technical tests proposed to candidates.Technical environment: .Net Framework, C#, VB.Net, ADO.Net, Winforms, WPF/MVVM, Infragistics (WinForms, WPF), Team Foundation Server, SQL Server.

Apr 2014 - Feb 2017

Analyst Developer

Bertrange, Lu

Implementation of .Net solutions for various business sectors (HealthCare, Finance, Mobility, etc.). I was involved in every step of the process (specifications/estimations, architecture, development, testing, deployment, and training).Technical environment: .Net Framework, C#, VB.Net, ADO.Net, Winforms, Infragistics (WinForms), Team Foundation Server, SQL Server.

Apr 2012 - Mar 2014

Junior Analyst Developer

Luxembourg, Luxembourg, Lu

* This experience was my Master's final internship, followed by a 6 months hire.Supporting the Dev team for daily tasks, mainly including maintenance and evolution of the broadcasting product composed of three applications.Implementation of a reporting solution for a foreign client, including reports, grids, and planning.Technical environment: .Net Framework, C#, WinForms, DevExpress (WinForms), NHibernate, Oracle Database, Visual Source Safe

Apr 2011 - Apr 2012

Junior System Administrator

Luxembourg, Lu

* This experience was a part-time/full-time internship for my Master degree.Supporting the System Team for day-to-day work.Study case on IAM (Identity and Access Management), and implementation with Microsoft Forefront Identity Manager 2010. Analysis and development of an Active Directorw rights-delegation solution through Microsoft Sharepoint Server. The goal was to delegate low-risks actions (Reset password, unlock account, etc.) to the Helpdesk team.Technical environment: Windows Server, Microsoft Active Directory and Exchange, Microsoft Forefront Identity Manager, C#

Jul 2009 - Mar 2011

Ancien Élève

Supinfo
2008 - 2011 ~3 yrs
Team & coworkers

Colleagues at Vonage

Other employees you can reach at vonage.com. View company contacts for 2730 employees →

3 education records

Guillaume Faas education

Supinfo Expert, Information Technology

Supinfo

Bts, Information Technology

Lycée Jean Zay

Baccalauréat Sti, Génie Electrotechnique

Lycée Louis Vincent
FAQ

Frequently asked questions about Guillaume Faas

Quick answers generated from the profile data available on this page.

What company does Guillaume Faas work for?

Guillaume Faas works for Vonage.

What is Guillaume Faas's role at Vonage?

Guillaume Faas is listed as Senior .Net Developer Advocate | Speaker | Coach | Mentor at Vonage.

What is Guillaume Faas's email address?

AeroLeads has found 1 work email signal at @vonage.com for Guillaume Faas at Vonage.

What is Guillaume Faas's phone number?

AeroLeads has found 1 phone signal(s) with area code 360 for Guillaume Faas at Vonage.

Where is Guillaume Faas based?

Guillaume Faas is based in Algrange, Grand Est, France while working with Vonage.

What companies has Guillaume Faas worked for?

Guillaume Faas has worked for Vonage, Codementor, Software Craft Luxembourg, Xtrem T.D.D, and Telkea Group.

Who are Guillaume Faas's colleagues at Vonage?

Guillaume Faas's colleagues at Vonage include Donna Berger, Gurpreet Kaur, Cory Clarke, Konstancja Wróblewska, and Ingrid Dillon, Cpa, Cgma,Cisa.

How can I contact Guillaume Faas?

You can use AeroLeads to view verified contact signals for Guillaume Faas at Vonage, including work email, phone, and LinkedIn data when available.

What schools did Guillaume Faas attend?

Guillaume Faas holds Supinfo Expert, Information Technology from Supinfo.

What skills is Guillaume Faas known for?

Guillaume Faas is listed with skills including .Net, C#, Vb.Net, Windows Phone, Wpf, Wcf Services, Silverlight, and Linq.

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