Senior AI Platform Engineer — Kubernetes & Agentic Systems

castaigroupinc; Spain; On-site; EUR 90,000 - 130,000; Full time

Job summary

CAST AI is seeking a platform engineer to design and build the systems behind our AI assistant that reasons over thousands of production Kubernetes clusters. You will work on agent flows, context retrieval, and the data connections that let it reason about live infrastructure.

You’ll develop and maintain a public, permission-aware MCP server, with curated tools, identity, audit, and strict safety gates so customers can use CAST AI via their own AI clients.

Qualifications

• Strong software engineering fundamentals with clean abstractions and maintainable code.

Responsibilities

• Design and build the systems behind our AI assistant, including agent flows and context retrieval.
• Build and evolve our public, permission-aware MCP server with curated tools, identity, audit, and safety gates.
• Develop and maintain cloud connectivity across AWS, GCP, and Azure, and support data foundations for agents.
• Write production Go services that interact with cloud provider APIs, Kubernetes, and LLM APIs in real time.
• Own features end-to-end from design through production rollout (typically 1–4 weeks).
• Debug novel problems such as wrong answers or cross-cloud permission edge cases.

Skills

Go programming

Distributed systems

Kubernetes

Auth flow design

CI/CD

Observability

English proficiency

Startup mindset

Multi-tenant SaaS

Agentic development workflows

Tools

AWS

GCP

Azure

OAuth 2.0 / OIDC

EKS/GKE/AKS

Job description

CAST AI is seeking a platform engineer to design and build the systems behind our AI assistant that reasons over thousands of production Kubernetes clusters. You will work on agent flows, context retrieval, and the data connections that let it reason about live infrastructure.

You’ll develop and maintain a public, permission-aware MCP server, with curated tools, identity, audit, and strict safety gates so customers can use CAST AI via their own AI clients.