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

voize; Warszawa; Hybrid; PLN 180,000 - 240,000; Full time

Benefits offered by this job

Stock options

Flexible hours & hybrid setup

Job summary

voize, a fast-growing Warsaw-based tech startup, is hiring a Backend Engineer to join the US/UK squad. You will ensure smooth data flows between voize and partner software, building integrations with care and scale.

Target candidates bring Kotlin mastery, API integration experience, and strong English communication skills. The role offers flexible hours and a hybrid setup with regular team events in Germany.

Qualifications

• Several years of backend development and API integration experience.
• Proficiency with Kotlin and Coroutines.
• API design using REST or GraphQL.
• Fluent English (C1) for communications with customers.
• Willingness to travel to Germany every 2 months.

Responsibilities

• Shape the future of integrations connecting voize with systems in care and medical sectors.
• Build a scalable API, set industry standards, and work with partners/clients.
• Take end-to-end ownership from idea to ongoing development of integrations.
• Design thoughtful data models and sustainable solutions for complex systems.
• Work with impact by saving caregivers time and improving documentation.

Skills

Backend development

API integration

Kotlin & Coroutines

REST/GraphQL

English (C1)

Travel 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.

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