Senior Back-end Developer (C# .NET)

This position is posted by Jobgether on behalf of a partner company. We are currently looking for a Senior Back-end Developer C# .NET in France.

You will join a fast-evolving digital content environment where back-end engineering plays a central role in delivering scalable, high-performance services to millions of users worldwide. As part of a senior technical team, you will contribute to the design, development, and optimization of robust APIs and core back-end systems that power a personalized reading experience across multiple platforms. The role offers a strong focus on architecture, performance, and reliability in a product-driven organization. You will collaborate closely with engineers, product teams, and cross-functional stakeholders in an agile and innovation-oriented setup. This is an opportunity to work on impactful systems that support large-scale content distribution while continuously improving technical quality. The environment values autonomy, technical excellence, and continuous learning.

Accountabilities

• Design, develop, and maintain scalable back-end services and APIs using C# and .NET Core.
• Ensure the performance, reliability, and security of existing systems while contributing to their continuous evolution.
• Participate in system architecture design and technical decision-making for back-end solutions.
• Implement unit tests, follow coding standards, and ensure high-quality code through regular code reviews.
• Work within an agile development environment, collaborating with cross-functional teams to deliver features efficiently.
• Contribute to CI/CD pipelines, version control practices, and development tool improvements.
• Optimize system performance and ensure adherence to best practices in software engineering.
• Conduct ongoing technological monitoring to identify new tools, frameworks, and solutions that can enhance the technical ecosystem.
  
  

Requirements

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• Strong expertise in C# and .NET Core development.
• Solid experience with SQL databases and data modeling.
• Good knowledge of REST APIs and/or gRPC architecture.
• Experience with CI/CD pipelines, source control systems, and modern development workflows.
• Strong background in performance optimization, unit testing, and software engineering best practices.
• Product-oriented mindset with the ability to align technical decisions with business needs.
• Strong collaboration skills and ability to work effectively within cross-functional teams.
• Fluency in both French and English.
• Ability to work independently in a fast-paced, agile, and evolving environment.
  
  

Benefits

• Freelance contract opportunity until end of December 2026.

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• Fully remote working arrangement within France.
• Opportunity to work on high-traffic, large-scale digital platforms.
• Exposure to modern back-end architectures and cloud-ready systems.
• Agile and collaborative international working environment.
• Strong technical culture focused on quality, innovation, and continuous improvement.
• Opportunity to contribute to impactful product experiences used by millions of users.
  
  

How Jobgether Works

We use an AI-powered matching process to ensure your application is reviewed quickly, objectively, and fairly against the role's core requirements. Our system identifies the top-fitting candidates, and this shortlist is then shared directly with the hiring company. The final decision and next steps (interviews, assessments) are managed by their internal team.

We appreciate your interest and wish you the best!

Why Apply Through Jobgether?

Data Privacy Notice: By submitting your application, you acknowledge that Jobgether will process your personal data to evaluate your candidacy and share relevant information with the hiring employer. This processing is based on legitimate interest and pre-contractual measures under applicable data protection laws (including GDPR). You may exercise your rights (access, rectification, erasure, objection) at any time.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.