Senior Backend Engineer, Poland (m/f/d)

voize GmbH; Warszawa; Hybrid; PLN 150,000 - 210,000; Full time

Benefits offered by this job

Stock options

Flexible hours

Hybrid setup

Job summary

voize GmbH in Warsaw, Poland is seeking a Backend Engineer to ensure data flows between voize and partner healthcare software. You will build and maintain integrations that connect our products with hospital systems.

The role emphasizes Kotlin and Coroutines, REST/GraphQL API design, and end-to-end ownership of integrations. Occasional travel to Germany every two months is required. We offer flexible hours and a hybrid setup.

Qualifications

• Several years of backend development and API integration experience.
• Proficiency in Kotlin and Coroutines.
• API design and development with REST or GraphQL.
• Business fluent in English (C1).

Responsibilities

• Shape the future of integrations between voize and care/hospital software.
• Build scalable API solutions and set industry standards.
• Own end-to-end delivery from idea to deployment.
• Design thoughtful data models for complex systems.
• Improve documentation and save care providers time.

Skills

Backend development

API integration

Kotlin

Coroutines

REST API

GraphQL

English (C1)

Travel to Germany

Job description

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 admin work that pulls nurses away from what matters most: people.

We're changing that by building the AI companion that frees nurses from admin, giving them back up to 30% of time. We don't replace humans - we support and amplify their impact. Today, 2,000+ care facilities trust voize, and over 200,000 nurses rely on our AI companion to ease their daily workload.

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.

As a fast-growing 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 Backend Engineer part of our US/UK squad based in our Warsaw, Poland HUB, you'll ensure that data flows smoothly between our products and our partners' software solutions. You'll build and maintain the integrations that connect the voize with senior care and hospital software platforms.

Your Daily Business - No two days are alike

• Shape the future of our integrations - Develop interfaces that seamlessly connect voize with systems in the care and medical sector

• Build future-proof solutions - Develop a scalable API, set industry standards, and work closely with partners and clients

• Take end-to-end ownership - From the idea and implementation to the ongoing development of our integrations

• Architecture with foresight - Design thoughtful data models and sustainable solutions for complex systems

• Work with impact - Your work saves caregivers time, improves documentation, and supports people who do amazing work every day.

Your Skillset - What you bring to the table

• Several years of experience in backend development and API integration

• Proficiency with Kotlin and Coroutines is essential

• API design and development with REST or GraphQL

• Business fluent in English (C1) to communicate effectively with customers

• Open to travel to Germany every 2 months

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 healthcare professionals more time for real patient care

• We foster an open, collaborative culture with regular team events in Germany

• 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?