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voize

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

Warsaw, Poland
Level
Senior
Work type
Hybrid · Warsaw

Not stated in the posting: salary, visa.

Open. First seen 20 October 2026.

Apply on the company's site →

About the role

voize's standard text

🎤 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.

voize's standard text

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.
voize's standard text

✨ 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!

What this role asks for

Particular to this role

ETL · Machine Learning · OAuth

Rare in voize's other 20 open postings.

Standard for full stack roles

CI/CD · React · TypeScript

Common in full stack postings at any company.

73% of this description is written for the role. The rest is voize's standard text, folded away below.

Compared with voize's other open jobs.

The team: Tech HIRES STEADILY

This role is one of 9 open in Tech. 5 were posted in the last 30 days and the oldest in July: a team that hires all year rather than one being built.

WHAT THE TEAM WORKS WITH, ACROSS ITS POSTINGS

Kotlin (8 of 9), CI/CD (6 of 9), Android (4 of 9), Git (4 of 9), Jetpack Compose (4 of 9), Machine Learning (2 of 9)

OTHER ROLES ON THIS TEAM

From the team and dates on voize's own job board.

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