10+
years of software development
Fullstack .NET freelancer · Nice · Remote, hybrid, on-site
Valentin Passe
Freelance Fullstack .NET developer in Nice — I design reliable web products that stay readable and easy to evolve.
Fullstack
Back-end, APIs, Blazor web and MAUI mobile on the .NET stack
.NET
core stack, from legacy to .NET 10
About
As a freelance Fullstack .NET engineer, I help companies turn business needs into robust, readable and long-lasting web products.
A freelance Fullstack .NET developer based in Nice, France, I bring over ten years of software delivery, as both an employee and an independent contractor, in demanding operational environments. I work across the whole value chain - scoping, application architecture, implementation, quality, and production delivery - with a simple objective: ship quickly and cleanly, without sacrificing maintainability.
My technical core covers .NET (Core, MVC, Blazor, MAUI), Clean / DDD / CQRS architecture, the Azure cloud, and databases such as PostgreSQL. Self-taught by training and temperament, I combine autonomy, rigor, and collaborative work. My active watch on AI pushes me to continuously integrate the tools that bring real value to teams, when they genuinely simplify a workflow rather than adding complexity.
DesignShipStabilizeEvolve
Why work with me
End-to-end execution
From early scoping to production release, I keep a result-oriented mindset and a clear product overview.
Strong fullstack .NET focus
Back-end, APIs, Blazor front-end, MAUI mobile, and application architecture to avoid dead zones between layers.
Pragmatic AI integration
I use AI when it genuinely simplifies a workflow, not as a decorative layer that adds complexity.
Services
Three intervention modes to structure a roadmap, strengthen an existing product, or unlock practical AI-driven gains.
Scoping and technical direction
Client problem
The business need is clear, but the solution still lacks the technical structure required to start with confidence.
Business outcome
You get clear architecture decisions, a deliverable rollout plan, and a realistic delivery path.
- Scoping workshops
- .NET / Clean architecture
- Prioritized roadmap
Fullstack .NET delivery
Client problem
Your product must evolve quickly without hurting code clarity, performance, or long-term maintainability.
Business outcome
You speed up production delivery with an implementation that is robust, readable, and aligned with real usage.
- .NET APIs and back-end
- Blazor / MAUI interfaces
- Quality and performance
Useful automation and AI
Client problem
Teams lose time on repetitive operations and need practical gains without launching an oversized transformation program.
Business outcome
You identify high-value automations with restrained AI integration adapted to the business context.
- Workflow audit
- Targeted automation
- Adoption support
Skills
Fullstack .NET expertise supported by front-end, cloud, data, and delivery capabilities for concrete projects.
Fullstack .NET
The core stack used to design, ship, and evolve reliable applications.
- C#
- .NET
- ASP.NET Core
- Blazor
- MAUI
- Entity Framework
- Azure
- Automated testing
Front-end & Architecture
Web interfaces, technical structure, and architecture choices driven by actual usage.
- Web fundamentals
- JavaScript
- Architectures
- Project delivery / Team collaboration
Data & Cloud
Persistence, cloud services, and tooling to support production-ready solutions.
- SQL Server
- PostgreSQL
- MongoDB
- Redis
- Firebase
Delivery & Tooling
Production environment, team collaboration, and delivery execution tooling.
- Visual Studio
- Azure DevOps / GitHub
- Docker
- RabbitMQ
- Qlik Sense
- SSMS / Report Builder
Environments & Human qualities
Ability to contribute across varied environments with autonomy and strong collaboration.
- Self-taught
- Windows
- Autonomous
- Mac OS
- Linux
- Team spirit
- Methodical
- Driven
Experience
Over 10 years of delivery, from initial internship to current freelance engagements - alternating employee and freelance positions in demanding operational environments.
Nov. 2023 - Present
Full-Stack .NET Developer
SMEG · Monaco · Freelance
Context
On-call, emergency and intervention management platform (desktop and mobile). Architecture mission: analysis and rebuild of the existing foundation, definition of a modular target architecture and a reusable project template. Mobile POC in MAUI to validate the foundation and formalize the field constraints. Design of the Nexio customer portal (individuals and businesses).
Value delivered
Modular technical foundation delivered, mobile POC validated, customer portal in production. Higher field responsiveness in critical situations.
- .NET 8/9/10
- C#
- Clean Architecture
- DDD
- MAUI
- AWS
- Docker
- Azure DevOps
- PostgreSQL
Jun. 2023 - Oct. 2023
Back-end .NET Developer
TidyUp Technologies · Valbonne · Freelance
Context
Design and development of an innovative content organization, classification, and search solution with an AI component (back-end).
Value delivered
Durable back-end foundation structured to support product evolution and processing reliability at scale.
- .NET 7
- C#
- ABP Framework
- DDD
- Azure
- Docker
- RabbitMQ
- Redis
- MongoDB
- PostgreSQL
Apr. 2021 - Jun. 2023
Back-end .NET Developer
Ubaldi · Carros · Full-time
Context
Design and development of multiple internal back-end projects. Active contributor to the migration of several applications to Azure Cloud, and to the introduction of a DDD approach to support company growth.
Value delivered
Strengthened back-end delivery, raised the architecture maturity (DDD), and guaranteed quality through code reviews in an Agile team.
- .NET 6 and earlier
- C#
- Blazor
- Entity Framework
- Azure Cloud
- Vue.js
- Bootstrap
- Azure DevOps
- SQL Server
Sep. 2015 - Apr. 2021
Fullstack .NET Developer
Régie Eau d'Azur · Nice · Full-time
Context
Development of multiple internal .NET applications, handled end-to-end: requirements, technical documentation, estimation, database and application development, technical and business testing, demos. Development of a lightweight JavaScript library to improve application ergonomics.
Value delivered
Progressive industrialization of the application portfolio, higher service quality for end users, and capitalization via a reusable internal JS library.
- .NET MVC 4.7
- .NET Core 3.1/5
- C#
- Blazor
- Xamarin Forms
- Entity Framework
- SCSS
- jQuery
- SSIS
- SQL Server
- TFS
Sep. 2014 - Sep. 2015
Fullstack .NET Developer
Beyond IT (B-Network) · Cannes · Apprenticeship
Context
Design of several .NET WebForm web applications: requirements analysis, scope definition, development, testing, deployment, and demo.
Value delivered
First long-form professional experience - full ownership of the lifecycle of small WebForm applications in a real-world environment.
- ASP.NET WebForm
- C#
- Entity Framework
- HTML/CSS
- JavaScript
- jQuery
- Ajax
- Bootstrap
Jan. 2014 - Mar. 2014
Back-end PHP Developer
Pascal Coste (headquarters) · Nice · Internship
Context
Design of a statistics file-sharing back-end. Drafting of functional requirements for an ERP solution. Participation in several audits.
Value delivered
First hands-on exposure to a full web project lifecycle and to functional analysis on the editor side.
- PHP
- HTML/CSS
- JavaScript
- jQuery
- Ajax
- Bootstrap
- MVC
Education
An academic foundation built via apprenticeship, complemented by continuous learning and skill growth shaped by real delivery work.
2014 - 2015
Professional Bachelor's Degree - SIL / IDSE (Apprenticeship)
IUT Nice Sophia Antipolis
Software and Computing Systems, specializing in Distributed Computing and Enterprise Information Systems. Year completed in apprenticeship at Beyond IT.
2012 - 2014
BTS SIO - SLAM
Lycée Honoré d'Estienne d'Orves, Nice
IT Services for Organizations, Software Solutions and Business Applications track - a structured foundation in development, databases, and project culture.
2008 - 2011
French High School Diploma (Baccalauréat)
Lycée Jules Ferry, Cannes
Secondary school degree, starting point of a continuous self-taught journey in software development.
Projects
A selection of concrete delivery contexts showing how I turn business or technical constraints into usable outcomes.
Real-time on-call - desktop and mobile
For SMEG (Monaco), a business solution that digitizes on-call operations, emergencies, and interventions across desktop and MAUI mobile, in a high-availability operational environment.
Context
Demanding operational environment at SMEG Monaco with high expectations around availability, continuity of service, and mobile constraints (network, updates, data sync).
Contribution
Modular target architecture, reusable project template, MAUI mobile POC to validate the foundation, and formalization of the field constraints.
Outcome
On-call processes digitized end to end (desktop and MAUI mobile) and put into service, with higher team responsiveness on critical interventions.
Nexio - customer portal for individuals and businesses
Nexio, SMEG's web portal for customer request management and follow-up, unified across individual and business profiles, designed and built fullstack through to production.
Context
Redesign of a multi-target customer journey requiring a consistent experience across individuals and businesses.
Contribution
Fullstack design and development of the portal, functional analysis, technical documentation, and coordination of incremental releases.
Outcome
Unified customer portal delivered to production for both individuals and businesses, giving them self-service tracking of their requests.
AI platform - digital content management
The back-end foundation of an innovative platform for organizing, classifying, and searching digital content with an AI component, built on .NET 7 / ABP to absorb growing volumes reliably.
Context
Need for a strong back-end foundation to support long-term product evolution and AI processing on growing data volumes.
Contribution
Back-end development on .NET 7 with the ABP framework, structuring technical flows (RabbitMQ, Redis, MongoDB) and persistence.
Outcome
Durable, well-structured back-end foundation in production (RabbitMQ, Redis, MongoDB) that secures product scale-up and the reliability of AI processing.
Contact
Tell me what you want to ship. I will get back to you quickly with a concrete view of the need, the constraints, and the most relevant delivery path.
Fast reply, direct conversation, no unnecessary funnel.
- New or redesigned .NET web application
- Fullstack reinforcement on an existing product
- Technical review, scoping, or delivery acceleration
Direct email: passe.valentin@gmail.com