Backend Engineer

About Epiminds We’re building Lucy, an AI system that investigates marketing performance and carries approved changes through to execution. Behind that work is a backend coordinating model calls, external APIs, persistent state, and code running in sandboxes. We’re a small team in Stockholm building the infrastructure this product needs. The Problem Agent workloads are difficult to predict. One request can become several parallel investigations. A task can pause for approval and continue later. A worker can disappear after an external API accepts a change but before the result is saved. Retrying may duplicate the action. Giving up may leave the work unfinished. Keeping everything ready reduces latency but consumes idle compute. The system has to know what happened, who owns the next step, and what is safe to repeat—while keeping data isolated and costs under control. The Role You’ll own the execution infrastructure, data systems, and reliability behind Lucy. You’ll work across applicat…