Senior Backend Engineer - Kotlin/API, Flexible Hours, Stock Options

voize-l; Województwo mazowieckie; Hybrid; PLN 180,000 - 260,000; Full time

Benefits offered by this job

Stock options

Hybrid work setup

Flexible hours

Team events in Germany

Job summary

voize is seeking a Backend Engineer to join our US/UK squad based in our Warsaw hub, ensuring seamless data flow between voize and partners' software. You will build and maintain integrations with care facilities and hospital software platforms.

As a fast-growing startup, you will design a scalable API, establish robust data models, and collaborate with clients to deliver reliable integrations in a flexible, hybrid work setup.

Qualifications

• 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

Responsibilities

• 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.

Skills

Backend development

API integration

Kotlin

Coroutines

REST

GraphQL

English (C1)

Travel to Germany

Job description

voize is seeking a Backend Engineer to join our US/UK squad based in our Warsaw hub, ensuring seamless data flow between voize and partners' software. You will build and maintain integrations with care facilities and hospital software platforms.

As a fast-growing startup, you will design a scalable API, establish robust data models, and collaborate with clients to deliver reliable integrations in a flexible, hybrid work setup.