Freelancer profile translated to English.
Back to original languageAbout Ibrahima
Senior Fullstack Developer | Expert C#/.NET & Angular | Technical Lead & Software Architect
Available immediately – Freelance – Full Remote or IDF
Looking for a reliable, experienced, and immediately available developer to strengthen your teams or lead a complex project? I offer over 8 years of experience in developing high-performance, secure, and maintainable web applications, with a strong specialization in the Microsoft stack (C# / .NET / SQL Server) and Angular.
- Design of robust architectures (Clean Architecture, CQRS, TDD)
- Fullstack development: .NET 8, C#, Web API, Angular 18, RxJS, SignalStore
- Automated testing: xUnit, FluentAssertions, Jest
- Team coaching, sprint leadership (Azure DevOps, Git, CI/CD)
- Code optimization (SonarQube), API security, legacy application refactoring
- Greenfield projects,
- Technical refactoring,
- Or team reinforcements with integrated mentoring.
Contact me today for a quick initial discussion about your needs. Together, let's move your projects forward faster and more smoothly.
French
Native or bilingual
English
Fluent
Can work on-site
Paris (up to 50km)
Experience
- Capgemini Consulting - Capgemini InventCapgemini • Senior Backend Developer C# / .NETBANKING AND INSURANCESeptember 2025 - Today (11 months)Paris, FranceIntervention on critical backend applications in the financial sector, with a strong focus on performance, scalability, and real-time processing, in a context of modernization and optimization of existing systems.Assignments and achievements:
- In-depth technical audit of financial backend applications to identify performance, concurrency, and robustness bottlenecks
- Refactoring and optimization of existing code to take full advantage of asynchronous programming (.NET async/await) and multithreading,
allowing for better management of loads and real-time flows- Massive code factorization to reduce complexity, improve maintainability, and enhance the readability of business logic
- Optimization of Azure Functions triggering deferred batches, with
- improved execution reliability and reduced processing times
- Implementation and strengthening of 100% unit test coverage, ensuring non-regression and stability of changes
- Contribution to technical choices and backend best practices in a demanding environment
Team Lead Role – Applied Research Project:- Technical lead and Team Lead role on an innovative research project with a strong financial component
- Direct interface between development teams and a researcher, ensuring the accurate translation of theoretical concepts into concrete technical solutions
- Coaching and coordination of developers on aspects of:
- Backend architecture
- Code quality
- Structuring complex business logic
- Participation in the design of a decision support platform for investors, aiming to:
- Centralize ongoing actions and positions
- Facilitate analysis and decision-making on various financial products
- Strong involvement in backend robustness, performance, and scalability topics
- Guisend • IndépendantCEO & Software Architect – C# / .NET / AngularE-COMMERCEMay 2025 - Today (1 year and 3 months)Paris, FranceFounder and CEO of Guisend, an innovative platform that allowsto send phone top-ups and data to Africaand internationally in a simple, fast, and secure way.I fully designed and developed the application, taking charge of- The choice of technical architecture (Clean Architecture / DDD)- Fullstack development with C# / .NET 8 on the backend and Angular19 on the frontend- Securing flows and payment integration- Responsive design for mobile, tablet, and desktop- Deployment on Azure & domain management (DNS, security,performance)- User experience and product optimizationsMy goal: to create a fluid and reliable solution for the diaspora, whilebuilding a solid and scalable technical foundation.
- TF1Software Architect & Fullstack Developer C#/.NET & AngularPRESS AND MEDIAApril 2024 - May 2025 (1 year and 1 month)92100 Boulogne-Billancourt, France**Main mission**:Design and development of a secure web application forplanning employees and journalists for the TF1 group. The toolallows for smooth availability management, advanced document centralization,and an intuitive interface for non-technical users.**Responsibilities & Achievements**:
- Definition and implementation of the software architecture based on Clean Architecture principles and the CQRS pattern
- Backend development in .NET 8 (C#) with REST API security, modular business logic, and compliance with GDPR standards
- Frontend implementation with Angular 18, SignalStore, and RxJS for smooth and high-performance state management
- Implementation of automated tests (xUnit, FluentAssertions, Jest) in a TDD approach
- Use of SonarQube for quality monitoring, anomaly detection, and technical debt reduction
- Contribution to UI/UX design to make the tool simple, fast, and accessible to all internal profiles
- Cross-functional collaboration with product, security, and infrastructure teams in an Agile environment
- Tool adopted by several business units (journalism, HR, coordination)
- Reduction of manual planning time by 50%
- Significant improvement in traceability and document centralization
- Excellent user feedback thanks to the application's ergonomics and speed
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Education
- Master Web & IoTUniversity of Le Havre Normandie2016Master Web & IoT
- MI LicenceUniversity of Le Havre Normandie2014Licence MI