I am a freelance software engineer (Paris, working remotely for clients across Europe) who takes a project from idea to production and keeps it running. What I build - Any type of website or web app: marketing sites, webshops, headless front ends, SaaS platforms, dashboards and back offices (React, TypeScript, Next.js, Node.js, Python, C#, Go). - Mobile apps with React Native / Expo, plus the APIs and integrations behind them. - Fast, secure and SEO-friendly sites: static prerendering, performance tuning, OAuth2 / OpenID Connect, GDPR. DevOps and continuous delivery - Docker, Kubernetes, Helm, CI/CD with Concourse CI, GitHub Actions and GitLab CI, infrastructure as code and automated releases. - At Criteo I build and run the continuous deployment platform used by 1,500+ engineers every day, so I know what a delivery pipeline needs to stay reliable at scale. Observability - OpenTelemetry, OpenSearch, Prometheus, Grafana, Jaeger and Zipkin: tracing, metrics, structured logs and alerts that reach your Slack before your customers notice. - I have designed observability for microservices and I run my own product, SignalAtlas, in production with dashboards and alerting. If you cannot see what your system is doing, I make it visible. How I work - 5 years of experience, an engineering degree (Master's level), fluent English, native French. - Direct communication, small deliverables shipped often, documentation and handover included. - Available within 30 to 45 days. Rate: 80 EUR per hour. Portfolio: https://lerouxadrien.github.io/portfolio/