Freelancer profile translated to English.

Description

Senior Fullstack .NET / React, I help companies modernize their platforms, structure their technical approach, and upskill their teams.

I work in demanding environments: redesigns, cloud migrations, microservices, CI/CD pipelines, technical debt reduction, performance optimization, and industrializing practices.

My approach is **pragmatic, value-oriented**, and always aligned with business objectives.

🔧 Technical Expertise

Cloud : strong experience in AWS (ECS, Lambda, SNS/SQS, CloudWatch, IAM, S3…), operational knowledge of Azure
Infrastructure as Code : Terraform (cloud environments)
Observability & Search : very good command of OpenSearch/Elasticsearch (indexing, complex queries) and Datadog (APM, logs, dashboards, alerting)
Architecture & Modernization : microservices, scalability, performance, redesigns, cost optimization
Delivery & Quality : CI/CD, testing, pipelines, tooling, documentation

Fullstack Development : .NET Core, C#, React, TypeScript

🤝 Support & Leadership

I help teams clarify technical choices, structure delivery, improve practices, and upskill.

My role:secure decisions, streamline deliveries, and create an environment where we produce quickly, well, and sustainably.

🤖 AI & Developer Productivity

I work on the pragmatic integration of AI into development workflows:

advanced use of GitHub Copilot (VSCode, assisted generation, configuration on GitHub projects)
writing internal guidelines (skills and agents, best practices)

Objective: improve productivity and quality without overpromising.

👉 Available for

Architecture, modernization, senior technical reinforcement, redesign, cloud optimization, observability, team coaching, technical audit.

Languages

French
Native or bilingual
English
Fluent

Workplace preferences

Can work on-site

Paris (up to 50km)

Aviv - SeLoger
Senior Fullstack Developer .Net React
REAL ESTATE
January 2021 - Today (5 years and 7 months)
Paris, France
Following the European reorganization initiated by the AVIV restructuring, I joined as a Senior Developer the team responsible for implementing theSavedSearch & Alertingwhitelabel for the group's websites: Immowelt / Immonet / Logic Immo / SeLoger / SeLoger Neuf...

Mission
Collaboration on the architecture and development of the new matching (OpenSearch) and alerting (SNS/SQS/Lambda/ECS) pipeline, responsible for sending millions of email and push notifications daily to users when a new listing is published on one of the sites.
Work on system performance to ensure correct processing times for high volumes (over 18 million active SavedSearches and over 30 million notifications sent daily).
Design, development, and execution of user data migrations from legacy systems to the new WL system.
Support, collaboration, and leadership in the development of the team's front-end components (React) within the micro-frontend ecosystem established during the WhiteLabel project.
Technical environment
AWS / Lambda / ECS / SNS / SQS / Athena / OpenSearch

C# / .NET 6/8 / xUnit / Specflow
React / Storybook / TypeScript
Circle CI / Terraform
Datadog
Amazon Web Services Elasticsearch C# Terraform Datadog
SeLoger
Senior Fullstack Developer .Net React / Lead Developer
REAL ESTATE
January 2021 - December 2023 (2 years and 11 months)
Paris, France
Project: SeLoger Bureaux & Commerces

Initially as a Senior Developer, then progressively as Lead Developer, responsible for maintenance, new feature development, and technical migrations for the public-facing SeLoger Bureaux & Commerces website. Finally, providing technical leadership for the team's developers.

Mission
Analyze and understand business needs.
Maintain existing applications.
Develop new features.
Technical migrations and modernization of development processes.
Challenges
Development of major functional redesigns (e.g., redesign of the search engine on the listing page by market).
Understanding product requirements and advising on implementation methods.
Defining the architecture, based on microservice APIs.
Lift and shift of various services maintained by the team from EC2 to AWS / EKS.
Cleaning up synchronization batches to migrate them from custom layers to standard libraries (Dapper, etc.) and migrating to .Net Core / EKS.
Cleaning up and simplifying the API back-end architecture.
Cleaning up and reducing technical debt on the front-end project: migrating from VueJS to React.
Migration to ArgoCD in collaboration with operations.
Migration of CI/CD from TeamCity/Octopus to Circle-CI.
As Lead Dev:
Migration to NextJS.
Reduction of AWS costs.
Refactoring and simplification of projects to reduce technical debt and complexity within the team's scope.
Documentation and creation of diagrams explaining the architecture of projects maintained by the team.
Organizing and facilitating technical meetings to foster synergy and exchange among developers.
Mentoring junior developers in the team.
Technical environment
AWS

C# / ASP .Net Framework 4.7 / ASP .Net Core
React / NextJS / Styled-components
Circle CI / TeamCity / Octopus
C# React.js Next.js CircleCI Amazon Web Services
L'Oréal SA - L'Oréal France
Backend .NET Developer Consultant
FASHION AND COSMETICS
July 2020 - December 2020 (5 months)
Clichy, France
Project: Beauty Hub – Skin Genius

Development of backend APIs supporting, among other things, the consumer mobile application Skin Dr.

Mission
Analyze and understand business needs.
Advise on development best practices.
Challenges
Development of fully serverless backend APIs based on Azure Functions.
Implementation of development best practices (pull requests, unit tests, git branching strategy).
Technical environment
Azure Functions - C# .NET Core

Docker Containers - Kubernetes
C# Microsoft Azure Docker