Senior Backend Engineer (.NET and Python)

Avenga is an international engineering firm helping businesses operate with AI at the core. With 6,000+ experts worldwide, we combine engineering expertise with AI-native thinking to turn ambitious ideas into real-world impact across industries, technologies, and markets. At the core of the role We’re looking for a hands-on engineer to help shape an enterprise platform from an early stage, building and maintaining the backend services, APIs, and cloud infrastructure that power AI-driven solutions.

You’ll focus on security, access control, policy enforcement, observability, and reliability at enterprise scale, while leveraging automation and modern DevOps practices to streamline delivery. Your work will have a visible impact from the first weeks, with opportunities to contribute to the platform itself and later support its deployment with enterprise clients. Core skills you’ll bring 6+ years of professional backend engineering, with production experience in both C#/.NET and Python, and strong in at least one of them.

API and distributed-systems design: REST and gRPC, asynchronous processing and queues, idempotency, relational and NoSQL data stores. Production experience on at least one major cloud (Azure, AWS or GCP) and working experience with a second, including Terraform or equivalent, containers and Kubernetes. Security fundamentals: O

Auth 2.0 and OpenID Connect, secrets, least privilege, network isolation, data protection. Observability experience: OpenTelemetry, Promethe