Freelancer profile translated to English.
Back to original languageAbout Alex
Backend Developer | C# | .NET | REST API (10 years of experience)
You are looking for asenior backend developer**, expert in **C#**, **.Net**, and **API**, capable of delivering **quicklywhile maintaining **code quality**?
For nearly 10 years, I have been supportingstartups**, **scale-ups**, and **large corporationsoncomplex backendprojects:
- Openfield
- Mangopay
- Stago
I can work onexisting codebases**, **modernizationsoflegacyprojects, or new projects **from scratch**. I rely on my past experiences and my desire to produce solutions ready **for production**:
- Observability
My role in your organization
Quicklyintegrate into the existing structure.Respect team standards/practices(Best practice, Clean code, Clean architecture) andintegrate into projectsto ensure each deliverable istestedandreadyfor production.
Contribute torobustandmaintainableC# | .Net backend development.
Technical Stack:backend development, C#, .Net, REST API, DDD (Domain-Driven Design), Clean Code, Clean architecture, CI/CD, SQL, noSQL, AWS, Azure, RabbitMQ, MSMQ, Microservice, F#
Need to launch a .Net project or strengthen your backend team?
I am available to discuss to best understandyour needs**, grasp the **technical challenges**, and propose a **clearapproach.
I respond quickly and can be available as needed.
French
Native or bilingual
English
Native or bilingual
Can work on-site
Paris (up to 40km)
Experience
- D-EDGE Hospitality SolutionsFreelance senior developer C#HOSPITALITYJune 2024 - Today (2 years)Paris, FranceScale-up HotelTech - 500+ employees**🎯Client Challenge**: Accelerate the time-to-market of a new strategic API to connect new hotels and reinforce teams to align with business ambitions.-> **Key Contributions**:
- Implementation of the new strategic API through the development of new services in .NET Core.
- Setup of Grafana monitoring boards for the new API to track new services.
- Implementation of a resilience strategy (Retry Policy, Error handling) ensuring 99% uptime and limiting overbooking.
- Creation of new CI/CD pipelines on Gitlab for automated deployment of new services.
- Maintenance and implementation of new features on F# services.
- Securing database access via a new API to centralize access for different services.
**-> Business Impact**:- Delivery of critical features on time to maintain a competitive advantage.
- Reduction in support tickets due to the migration of hotels to the new connected channel.
🔧 **Stack**: C# | F# | .Net6 | SQL Server | MSMQ | Grafana | REST API - MangopayAPI DeveloperBANKING AND INSURANCEFebruary 2021 - April 2024 (3 years and 2 months)Paris, FranceMangopay - FinTech Scale-up - European leader in payment solutions for marketplaces🎯 **Critical Challenge**: Enable company scalability, particularly in the area of outgoing funds from the platform. Recruit necessary resources to support growth ambitions. Maintain a high level of transaction security.**-> Key Contributions**:
- Automation of bank fund return processing, from estimation to realization and production deployment, to reduce manual tasks for support.
- Gathering requirements, specifying tickets for interbank format updates, through to development, code review, and delivery monitoring.
- Migration from a monolithic solution to a modular monolith, then to a microservice-oriented structure.
- Facilitating partner meetings to improve our consumption of their APIs and anticipate potential technical constraints.
- Participation in training and recruitment of developers for the Payout team.
-> **Business Impact**:- Maintained platform stability with a 320% growth in transaction volume.
- Saved 8 hours/week through automation of fund returns.
- Modernized the codebase, enabling the implementation of new features at a much lower cost.
- Achieved 99% API uptime despite a monolith to microservice migration.
🔧 Stack: C# | .Net6 | SQL Server | RabbitMQ| Grafana | REST API - Openfield LiveC# DeveloperSOFTWARE PUBLISHINGSeptember 2018 - February 2021 (2 years and 5 months)Malakoff, FranceOpenfield is a company that provides a data visualization portal for venues that host the public. It collects data from clients or their partners to aggregate and enrich it before presenting it as KPIs or graphs.• Development and deployment of web jobs for collecting client data from various sources, SFTP file uploads, REST APIs, WCF. (C#, .NET, Azure)• Evolution of Openfield's internal APIs to standardize partner information and inject it into a data lake. (C#, .NET, Azure, SQL, Cassandra (NoSQL))• Level 2 support, bug investigation, analysis of collected data to monitor production. (Python, Databricks)• Data injection into a Dynamics CRM to enable clients to perform marketing targeting. (C#, .NET, Azure, Dynamics)• Collection of marketing campaign feedback, performance analysis, code optimization. (Visual Studio & DB profiling)• Maintenance and evolution of CI/CD for all newly developed connectors. (Azure Pipeline) Participation and facilitation of team Agile ceremonies.
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Education
- Engineer's degree, Computer Science and Applications - 3D Engineering and Media TechnologyESIEE PARIS2018Engineer's degree, Informatique et applications - Ingénierie 3D et technologie des médias
- Associate Degree Computer scienceIUT Paris Descartes2015Associate's degree, Informatique