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voize

Senior Fullstack Engineer – AI Health Tech

voize

. Co-own voize’s ML App, comprising a React/TypeScript SPA, Kotlin services, and Kotlin ETL on EKS .

Posted 11/12/2026contractBerlin • GermanySeniorWebsite

Core Competencies

Role fit
Core Competencies

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Demonstrates expertise in building production fullstack web applications using React and TypeScript, alongside strong backend development skills in Kotlin for ETL and data pipelines. Proficient in maintaining CI/CD processes and working with regulated data while exhibiting strong product and UX instincts.

Highest-signal resume keywords
React Application DevelopmentTypeScript ProficiencyKotlin Backend DevelopmentCI/CD MaintenanceRegulated Data Engineering

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills
ReactTypeScriptKotlinETLData PipelinesSchema DesignFullstack Web DevelopmentModel EvaluationData LabellingML Training Orchestration
Soft Skills
Product InstinctsUX Design
Tools & Technologies
EKSCI/CDLGTM-Stack Observability
Industry Keywords
HIPAAGDPRBAAPHI

Tech Stack

Tools & technologies
ETLJavaKotlinReactScalaTypeScript

About the role

Key responsibilities & impact
  • Co-own voize’s ML App, comprising a React/TypeScript SPA, Kotlin services, and 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, including UX, throughput, and task-type extensibility
  • Maintain CI/CD, EKS deployments, and LGTM-stack observability for the ML App
  • Triage and fix defects
  • Pair with the Platform team on prerequisites such as the FGA proxy and OIDC
  • Build AI companions that automate digital workflows and help frontline workers spend more time caring for people

Requirements

What you’ll need
  • 5+ years building production fullstack web apps with React + TypeScript
  • Excellent Kotlin (or JVM) backend experience, including services, ETL/data pipelines, and schema design
  • Demonstrated ownership of a complex, production-critical system
  • Comfortable engineering with regulated or sensitive data such as HIPAA, GDPR, BAA, or PHI
  • Strong product / UX instincts for annotation, labeling, data exploration, and operations UIs
  • Very good knowledge of TypeScript and frameworks such as React
  • Solid knowledge of Kotlin, or Java/Scala
  • English at B2 (advanced) level or higher
  • Legal right to work in the EU, EEA, Switzerland, or the UK; voize does not provide visa sponsorship
  • Must be living within or relocating to the EU/EEA, Switzerland, or the UK

Benefits

Comp & perks
  • Stock options
  • 30 vacation days plus your birthday off
  • Germany Transport Ticket
  • Urban Sports Club
  • Regular company off-sites
  • Access to learning platforms such as Blinkist and Audible
  • Free language courses
  • Flexible working hours
  • Good hybrid set-up
  • Travel expenses paid for visits to the Berlin HQ every 2–3 months