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

🎤 Why voize? Because we’re more than just a job!

At voize, **we believe the greatest gift to frontline workers is time - time to care, connect, and be present.** Today, that time is lost to **busywork and complex systems** that pull them away from what matters most: **people**.

**Our vision is to change that by building AI companions** that seamlessly take over digital workflows. We don’t replace humans with technology - **we amplify their impact.**

Our mission is backed with a **$50M Series A funding led by Balderton Capital, with support from HV Capital, Y Combinator and other leading VCs. Today, 2,000+ facilities trust voize, and over 200,000 users rely on our AI companion** to ease their daily workload.

As a dynamic team, we combine first-in-class technology with meaningful social impact. **And now, we’re looking for you to join us on this mission!**

💡 Your Mission

As a **Senior Fullstack Engineer** at voize, you will be a co-owner of voize's ML App - the in-house platform for annotation, data exploration, ML training orchestration, model evaluation, and the HIPAA-bearing data flows that move PHI from customer to model. Make in-house tooling good enough that revisiting Labelbox/Encord-style vendors is permanently off the table, and unblock HIPAA-compliant training on US customer data.

🚀 Your Daily Business - No two days are alike

• **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

🤝 Your Skillset - What you bring to the table

• 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)

🌱 Growing together - what you can expect at voize

• We are a fast-growing startup, that means you will tackle challenges, grow quickly, and make a real impact, giving frontline workers more time for people
• We foster an open, collaborative culture with regular team events, whether you work from our Berlin office or remotely
• Become a co-creator of our success with stock options
• You decide when you work best, that means flexible working hours and a good hybrid set-up.

✨ Ready to talk? Apply now! 🚀

We look forward to your application and can’t wait to meet you – no matter who you are or what background you have!