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NEXTON

Builds digital projects for large French firms

Full Stack Developer .NET & Flutter

Full-Stack EngineeringConfirmed live in the last 24 hours
Full-timeÎle-de-France, FranceNo salary listedIn-person

About the Job

Requirements

  • At least 8 years of software development experience, with strong expertise in either backend .NET or mobile Flutter and at least 1 to 2 years of production experience in the other area.
  • Strong command of Clean Architecture, Clean Code, automated testing, and code reviews.
  • Strong skills in C#, REST APIs, microservices architectures, business modeling, and databases such as MongoDB and PostgreSQL, and/or in Flutter, Dart, state management, and modular mobile architectures.
  • Understanding of CI/CD, observability, and monitoring for backend services and mobile applications.
  • Power-user proficiency with application AI tools and development agents.
  • Professional fluency in English to work in an international environment.

Responsibilities

  • Design, develop, test, and maintain robust, secure, and high-performing .NET backend APIs and services.
  • Develop and evolve Flutter mobile features integrated into user journeys.
  • Own complex features end to end, from design through production deployment.
  • Ensure consistency between APIs, data models, and the user experience in the mobile application.
  • Propose, advocate for, and implement technical architecture, business modeling, and product design choices in a Scrum environment.
  • Ensure high code quality by applying Clean Code and Clean Architecture principles, pair programming, and automated testing.
  • Address performance, scalability, security, and data protection across backend and mobile areas.
  • Operate, maintain the stability of, and monitor the performance of developed components using a you-build-it-you-run-it approach.
  • Integrate AI development agents into daily workflows to automate tasks while retaining responsibility for final quality.

About the Company

NEXTON

Builds digital projects for large French firms

NEXTON plans and builds digital projects for large French companies and online businesses, combining digital strategy with software development and marketing. Its teams cover product management, user-experience design, agile delivery and data work, and build websites, mobile applications and customer communications. Clients pay for specialist consultants assigned to their teams or for projects delivered by NEXTON's own agency. The agency combines designers, developers and marketing specialists to handle projects from planning and interface design through development and delivery. Founded in Paris in 2011, NEXTON is headquartered there at 5-7 rue Saint-Fiacre and operates across France.

Company size
Not listed
Company stage
Not listed
Total funding
Not listed
Headquarters
Paris, France
Founded
2011

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