Senior Backend Engineer (m/f/d)

Actimi is a medtech company, we build and deploy a digital health platform for realtime and on-demand data from wearables and medical devices. We're scaling our digital healthcare infrastructure, extend it with AI and are looking for a senior backend or fullstack engineer to help us with it. Tasks Design and scale NestJS services that handle real-time device telemetryOwn reliability under load, multi-tenancy, caching, queues, and PostgreSQL / Redis performanceIncorporate AI on all levels. Keep the system correct as it grows. Requirements Production experience with TypeScript, Node.js, and NestJS (Express under the hood)Solid problem-solving in distributed systems, and the instinct for debugging under loadExperience building backend services that stay correct and available as they scale Benefits Real ownership of critical backend systems, end to endDirect access to the founders and technical leadershipMeaningful work and systems that support real patient careStuttgart office with flexible/hybrid arrangementsCompetitive compensation and room to grow with the company Nice to have Exposure to FHIR or other healthcare data standardsIoT / MQTT ingestionLoad testing (e.g. k6)React/React Native experience How We Hire Our process is two stages: A coding assessment (data structures and algorithms), held virtuallyAn on-site session working through problems in pseudocode and discussion, whiteboard style, no compiler We want to see how you reason through problems, not just the final answer. How To Apply Send us your application along with a link to a profile that shows your work — LeetCodeHackerRankCodeforcesOr similar (a GitHub profile with relevant projects works too).