Freelancer profile translated to English.

Description

Hello 🖖

My name is Sylvain, I've been a developer for nearly 16 years. For the past eight years, I've been focusing on TypeScript, a language I love and which allowed me to write the book "TypeScript - Fundamental Notions". On the community side, I co-organize the TypeScript meetup in Paris with some friends and I am also a Microsoft MVP in the Developer Technologies category!

I've been passionate about web development since the beginning of my career, and especially on the backend. I enjoy creating web services using my favorite patterns: CQRS and Event Sourcing. I also like Agile methodology, the eXtreme Programming approach, and Behavior Driven Development. As for the cloud, I'm an AWS aficionado, especially Serverless services like Lambda, DynamoDB, Event Bridge, etc. I'm also a big fan of CloudFormation! I like using CDK for my Infra as Code and with GitHub Actions, it's my favorite combination 😎.

Industry field of expertise

Languages

French
Native or bilingual
English
Fluent

Workplace preferences

Remote only

Primarily works remotely

Fabrique numérique du ministère de la Transition Écologique et de la Cohésion des Territoires (MTE-MCT)
Senior Software Engineer
SOFTWARE PUBLISHING
February 2023 - Today (3 years and 4 months)
Paris, France
As part of the Potentiel project team (https://potentiel.beta.gouv.fr/), I set up the re-architecture of the application in order to move from an MVP to a project that could be transferred to the Ministry.

My scope is :
- Redesign of CQRS and Event Sourcing architecture, covered by tests and enabling improved maintainability and scalability.
- Implementing a couple of domain modules in TypeScript/Node.js, all with a craft-oriented approach (DDD/TDD/BDD, XP, Pair/Mob programming).
- Set up a new frontend by replacing a custom solution with Next.js
- Supporting and coaching the team around Domain Driven Design, Behavior Driven Development, Infrastructure and Architecture as well as certain development patterns (deep dive on CQRS, Mediator, Event Sourcing, ...).
- Defining a new integration flow with Github Actions by setting up ReleaseFlow.
- Assisting stackholders managing the backlog, writing user stories and their acceptance criteria.
Typescript Node.js Next.js PostgreSQL CQRS Event Sourcing Domain Driven Design Behavior Driven Development Scrum Github Actions AWS S3 Web architecture
Editions ENI
Author
SOFTWARE PUBLISHING
November 2019 - Today (6 years and 7 months)
Nantes, France
Writing of the book (french) "TypeScript Notions Fondamentales"

Release date:
- November 8, 2019 (version 1)
- August 21, 2023 (version 2)

Link: https://www.editions-eni.fr/livre/typescript-notions-fondamentales-2e-edition-9782409041266

This book on the TypeScript language is intended for developers, who already have programming experience in other languages, who wish to optimize and secure the production of JavaScript code in a development project. If the basic knowledge of JavaScript is a plus for reading this book, it is not essential to understand the different concepts studied.

In the first chapter, the authors first present the principles of language operation before setting up the development environment used for the examples, which is based on Visual Studio Code and Node.js. Then, in the following chapters, the reader discovers the different functionalities of the language (types, modules, decorators, genericity, asynchronism, advanced types...) as well as the possible programming paradigms (object-oriented programming and functional programming).

Finally, the last chapter proposes an implementation of the different concepts studied through the step-by-step development of a Node.js application with the Fastify library. It also allows you to discover how to enrich the operation of a library by using the functionalities of TypeScript and several design templates (MVC, Repository, dependency injection).
Typescript Node.js
LOXAM
Senior Cloud/Software Engineer (Freelance)
SOFTWARE PUBLISHING
October 2021 - December 2022 (1 year and 2 months)
Paris, France
Within the customer experience department, I've set up a new cloud infrastructure on AWS stack to improve contract management and billing.

My mission was to:
- Design the architecture (software and cloud)
- Implementing an event driven architecture with AWS Serverless services (Lambda, Event Bridge and DynamoDB).
- Defining the infrastructure with AWS CloudFormation (AWS CDK).
- Monitoring the whole project with AWS CloudWatch and Datadog.
- Developing the application in ATDD with TypeScript, Node.js and the AWS SDK.
Typescript Node.js AWS Lambda AWS DynamoDB AWS CDK AWS CloudWatch AWS EventBridge Datadog Test Driven Development Gitlab CI Event Driven Architecture Cloud Architecture Web architecture

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BAC+4, Software Design / Development
ENI Ecole Informatique
2011
BAC+4, Conception / Développement logiciel
Bac +2, Software Development
AFPA Rouen
2009
Bac +2, Développement Logiciel

Sylvain Pontoreau

Senior Software Engineer

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