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Senior Fullstack Engineer (m/f/d) - AI Health tech

Salary not listed • Warsaw, Poland • Full-time

Posted 10d ago

Job Location

Warsaw, Poland

Tech Stack

Remote Work Policy

On-site

Employment Type

Full-time

Categories

LLM Engineer

About the job

voize is building AI companions to seamlessly take over digital workflows for frontline workers, amplifying their impact rather than replacing them. With significant Series A funding and a growing user base, the company is seeking a Senior Fullstack Engineer to co-own its in-house ML App. This platform is crucial for annotation, data exploration, ML training orchestration, model evaluation, and managing sensitive data flows, aiming to make external vendor solutions unnecessary.

Responsibilities

  • Co-own the ML App codebase, including React/TypeScript SPA, Kotlin services, and Kotlin ETL on EKS.
  • Design and implement features for data labeling, data exploration, ML training orchestration, model evaluation, model playgrounds, and ML issue triage.
  • Lead the next iteration of in-house annotation tooling, focusing on UX, throughput, and task-type extensibility.
  • Maintain CI/CD, EKS deployments, and observability for the ML App, including triaging and fixing defects.
  • Collaborate with the Platform team on prerequisites like FGA proxy and OIDC for new training flows.

Requirements

  • 5+ years of experience building production fullstack web applications with React and TypeScript.
  • Excellent backend experience with Kotlin (or JVM), including services, ETL/data pipelines, and schema design.
  • Demonstrated ownership of a complex, production-critical system.
  • Experience engineering with regulated or sensitive data (HIPAA, GDPR, BAA, PHI, or similar).
  • Strong product and UX instincts, particularly in annotation, labeling, data exploration, and operational UIs.

Benefits

  • Stock options
  • Flexible working hours
  • Hybrid work setup