Full Stack Developer

Full Stack Developer – 12 Months Contract – Paris, France Hybrid – 3 days on site, 2 days remote Must be able to speak fluent French and a good command of English Required: - 6 Years in Software Development. .NET 10 / C#. Entity Framework. Full-stack experience with a modern frontend framework. React highly appreciated; Angular acceptable if the level is solid.  An experience limited to Razor Pages or Blazor only doesn't fit the expected need. REST APIs. PostgreSQL. MongoDB. Hexagonal architecture / Clean architecture. Unit testing & integration testing. Git. CI/CD. Familiarity with AWS & cloud application environments. Sensitivity to software quality, maintainability, security, & operability. AI Nice to have: - Experience with .NET & modern frontend technologies—ideally React or Angular at a proficient level. AWS cloud or microservices. Hands-on experience with AWS serverless or containerized services. Experience in production or application maintenance. Experience with critical, financial, accounting, data, or reconciliation workflows. Testing practices. Potential use of AI tools in a professional context. Goals & deliverables Looking for two .NET Full Stack Developer services, from Medior+ level to Senior. The expected skills files must be autonomous, rigorous, capable of covering subjects from start to finish & at ease in a product context as well as in a production context. Significant experience on a modern frontend framework is expected: React is highly appreciated, but a very good Angular level can also be suitable. The service provider will contribute to the development & maintenance of functionalities related to accounting flows & associated processing. He will also have to participate in the analysis of anomalies, the reliability of processing, the reduction of technical debt & the continuous improvement of software quality. The main contributions expected are as follows: Develop & maintain .NET/C# & frontend backend features on a modern web framework; Design & develop REST APIs & reliable application processing; Contribute to the reliability of accounting flows, the quality of data & the consistency of processing; Improve traceability, reconciliation capacity & gap analysis; Correct anomalies, reduce manual rework, & prevent regressions. Reduce technical debt when it contributes to product reliability, maintainability, or operability. Produce & maintain necessary unit tests, integration tests, & non-regression tests. Document the technical choices, sensitive treatments & operating procedures useful for the operation. With over 90 years' combined experience, NES Fircroft (NES) is proud to be the world's leading engineering staffing provider spanning the Oil & Gas, Power & Renewables, Chemicals, Construction & Infrastructure, Life Sciences, Mining and Manufacturing sectors worldwide. With more than 80 offices in 45 countries, we are able to provide our clients with the engineering and technical expertise they need, wherever and whenever it is needed. We offer contractors far more than a traditional recruitment service, supporting with everything from securing visas and work permits, to providing market-leading benefits packages and accommodation, ensuring they are safely and compliantly able to support our clients.