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# Fullstack Engineer

- **Company:** voize GmbH
- **Location:** Berlin, Germany
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Data Analysis, Continuous Integration, Extract Transform Load (ETL), Java Virtual Machine (JVM), Machine Learning, OpenID, TypeScript, ReactJS, Model Validation, Backend, Kotlin, Data Pipelines
- **Published:** September 5, 2026
- **Apply:** https://startup.jobs/senior-fullstack-engineer-m-f-d-ai-health-tech-voize-8125659

## About the Role

* 5+ years building production fullstack web apps with React + TypeScript
 * Excellent Kotlin (or JVM) backend experience - services, ETL/data pipelines, schema design
 * Demonstrated ownership of a complex, production-critical system
 * Comfortable engineering with regulated / sensitive data (HIPAA, GDPR, BAA, PHI, or similar)
 * Strong product / UX instincts (annotation, labeling, data exploration, ops UI)

## Description

* Co-own the ML App codebase (React/TS SPA + Kotlin services + Kotlin ETL on EKS)
 * Design and ship features for data labelling, data exploration, ML training orchestration, model evaluation, model playgrounds, and ML-issue triage
 * Drive the next iteration of in-house annotation tooling - UX, throughput, task-type extensibility - to the bar where vendor revisits are unnecessary
 * Maintain CI/CD, EKS deploys, and LGTM-stack observability for ML App; triage and fix defects
 * Pair with the Platform team on platform-side prerequisites (FGA proxy, OIDC) that the new training flows depend on


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