Tech Lead .NET / C# (M/F)

Signe+GirondeEURESpublished 09/23/2026
Must-have:C#GitAWSAzureDockerKubernetesBackendDevOpsCI/CDSenior
Machine translation — original language: French.Show original

RESPONSIBILITIES:

Your missions:

  • Lead technical design and standards (architecture, conventions, quality).
  • Design and evolve APIs (REST) and batch/scheduled processing.
  • Implement / enforce DDD and CQRS approaches when relevant (modeling, decomposition, projections).
  • Drive performance topics (profiling, optimization, scalability, DB access, latency).
  • Define standards: project structure, error handling, security, validations, tests, API versioning, documentation.
  • Guarantee maintainability (clean architecture, modularity, controlled technical debt).
  • Co-pilot OPS topics (with a senior dev): CI/CD, Kubernetes deployment (Helm), scaling strategy (HPA/VPA), monitoring/alerting.
  • Drive technological watch (ASP.NET Core, .NET ecosystem, API design, observability).
  • Lead the team: code reviews, mentoring, technical support, sharing best practices.

REQUIRED PROFILE:

Your profile:

  • Significant experience in .NET backend on production products, with achievements from scratch.
  • Solid expertise in API design, integrations, resilience (timeouts/retry/circuit breaker).
  • Concrete experience with Kubernetes + monitoring in production.
  • Ability to arbitrate, document, communicate, and grow a team.
  • You are passionate, curious, invested in technological watch, and have a very good mindset.

You master:

  • C# 12/13, .NET 8/9/10, ASP.NET Core, background processing (Workers/Jobs)
  • SQL & NoSQL (depending on context), ORM (EF Core)
  • CI/CD (GitHub/GitLab/Azure DevOps), Docker, Kubernetes, Helm Azure or AWS
  • Observability: metrics/logs/traces (APM, OpenTelemetry), dashboards and alerting
  • English