⚙️ BACK-END DEVELOPER (M/F)

The Back-end Developer designs and develops the server-side components of applications: APIs, business logic, databases, and integrations. He or she ensures the performance, security, and scalability of the systems that power digital products.

🎯 Tasks

• Design and develop APIs (REST, GraphQL, gRPC) and business services.
• Model and optimize databases (SQL and NoSQL).
• Ensure security (OWASP, authentication, secret management) and reliability.
• Write automated tests and participate in code reviews.
• Contribute to the architecture: microservices, event-driven, or modular monolith, depending on the context.

🛠️ Skills & Tech Stack 2026

• Programming Languages: TypeScript/Node.js (NestJS), Python (FastAPI, Django), Java (Spring Boot), C#/.NET 8+, Go, Ruby on Rails, PHP (Symfony, Laravel), Rust for demanding systems.
• Data: PostgreSQL (industry standard), MySQL, MongoDB, Redis.
• Messaging & Asynchronous Processing: Kafka, RabbitMQ, files, and workers.
• Infrastructure: Docker, Kubernetes, CI/CD, AWS/GCP/Azure cloud, observability (Datadog, Grafana).
• The concept of integrating AI APIs (LLMs) has become more common.

💰 2026 Salaries (as reported in France)

• Junior: 40–48 k€
• Confirmed: 48–65 k€
• Senior / Lead: 65–85 k€ and up
• Freelance: Average daily rate of 450–750 €.

🔍 Not to be confused with

DevOps (infrastructure and deployment), Data Engineer (data pipelines), and full-stack (front-end + back-end).

❓ Frequently Asked Questions

Which back-end language should you hire for in 2026? First and foremost, the one used in your existing stack; all else being equal, Node/TypeScript, Python, and Java dominate the job market in France.

Does a back-end developer need to know Kubernetes? They need to understand it, yes; but they don't need to administer it—that's the role of the DevOps/Platform teams.

📈 Trends

Back-end Lead, Software Architect, Staff Engineer, Engineering Manager, CTO.