.NET / C# Developer - Freelance

Our technical team is composed of more than 90 engineers from top-tier schools. Their mission: to design, develop, and evolve custom digital products: web/mobile applications, business platforms, and AI solutions.

In a context of strong growth (+50% per year since its creation), Galadrim is strengthening its freelance pool to support its clients on various projects.

We are preparing a mission for an international organization based in Paris. We are looking for two .NET developers to join the project team, alongside a Tech Lead, a Product Manager, and a designer.

The mission takes place from November 30 to December 24, 2026, full-time (20 days). One of the two developers will then be mobilized for a few days in January for the acceptance testing phase.

Beyond this mission, your profile will join our freelance pool and we will propose other missions to you as they arise.

The screens will have been scoped and validated by the client before your arrival. Your work consists of developing them in ASP.NET Core MVC, relying on the interfaces provided by the client.

Concretely, you will be required to:

• Develop screens from mockups: lists, detail sheets, filters, pagination, modals

• Implement the generation of Excel, Word, and PDF files in .NET

• Build accessible and bilingual French / English interfaces

• Work with the Tech Lead, who oversees the architecture and reviews the code

• Write automated tests and respect the best practices of the codebase

• Use AI on a daily basis (Claude Code, Cursor…) to go faster without lowering quality

Mission from November 30 to December 24, 2026, full-time, remote. Daily rate (TJM) according to profile.

• We have had the opportunity to work repeatedly with the CEA (Commissariat à l’Énergie Atomique), one of the main scientific research organizations in France. Our last project focused on improving an open-source data annotation tool, whose outputs are intended to train AI models. The project addressed multi-modal data visualization issues (2D, 3D, time series). Technically, the work covered UI architecture redesign, the integration of NLP models and 3D point clouds, a backend data pre-processing pipeline, as well as an agentic dimension to automate the annotation process.

• The FFTir (Fédération Française de Tir) called upon us to modernize and replace their internal administration tool: THOT, a platform centralizing the management of their organizational structure (federation, regions, leagues, departments, associations) as well as their sporting registries. As the application manages a significant volume of personal data (licensees, contact details, sporting history), security and compliance challenges were at the heart of the project. On the technical side, the project relies on a fullstack TypeScript monorepo architecture with a granular permission system by functionality and by entity, strict GDPR compliance, 2FA authentication, role-based access control, and traceability of sensitive actions; all scaled to absorb up to 200,000 simultaneous users during major events.

• Project X Paris is a French fashion brand. Since 2018, we have been supporting PXP in the development and evolution of a complete application ecosystem, structured to serve its business challenges. From web checkout to internal tools, including B2B flows and logistics, we have supported the product's growth by making sustainable technical and architectural choices. The project relied on structuring decisions to support its increasing complexity: centralization in a monorepo, rationalization of application components, migration to AWS, and strengthening quality via E2E test automation in continuous co-construction with the

• C#, ASP.NET Core MVC, Razor views and partial views

• htmx

• HTML, CSS, JavaScript, Bootstrap 5